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// Student_list.cpp // // this version 2015-06-23 //// A simple example of processing Student records ...// using a C++ STL list container to hold each 'Student' object// See MENU below to see what this program does ...// Note:// * this program allows only unique student id's for each record// * this program is set to update its file, (if there were any changes),// before quitting#include <iostream>#include <iomanip> // re. setw(widthValue) stream manipulator#include <fstream> // re. ostream, ofstream, ifstream objects#include <sstream> // re. ostringstream object#include <string>#include <list>#include <cctype> // re. tolower/toupper for case insensitive comparison// Globals ...const char* THIS_TERM = "fall.txt"; // file name for this term's recordsconst std::string MENU= "\n" " 1. V iew all records in memory at present\n" " 2. A dd a new student name and id\n" " 3. S ort student records\n" " 4. E dit/E rase a student record\n" " 5. L oad in student records from file\n" " 6. U pdate file with records currently in memory\n" " 7. e X it program\n\n" "Your choice (1..7) : ";class Student{public: // constructors ... Student() {} // default ctor ... Student( const std::string& nam, const std::string& num ) : name( nam ), id( num ) {} // setters ... void set_name( const std::string& nam ){ name = nam; } void set_id( const std::string& num ) { id = num; } // getters ... std::string get_name() const { return name; } std::string get_id() const { return id; }private: std::string name, // add any needed info here, just like in a C/C++ 'struct' id; // Note: this name comparison is case insensitive ... friend bool compare_nocaseName( const Student&, const Student& ); friend bool compare_id( const Student& a, const Student& b ); friend std::ostream& operator << ( std::ostream& os, const Student& s ) { return os << s.name << ", " << s.id; }} ;// friends defined here ... //bool compare_id( const Student& a, const Student& b ){ return a.id < b.id; }// this name comparison (friend function) is NOT case sensitive ...bool compare_nocaseName( const Student& a, const Student& b ){ size_t i = 0, lenNameA = a.name.length(), lenNameB = b.name.length(); while( i < lenNameA && i < lenNameB && tolower(a.name[i]) == tolower(b.name[i]) ) ++i ; // ok ... now check end conditions ... if( i < lenNameA ) { if( i < lenNameB ) return tolower(a.name[i]) < tolower(b.name[i]) ; else return false; // since i == lenNameB } // if reach here ... i == lenNameA ... so check ... if( i < lenNameB ) return true; // since i == lenNameA // else we have i == lenNameA && i == lenNameB ... so names equal return a.id < b.id;}// functions used by main to process a list of Student recordsint takeInStr( const std::string& msg );void pauseForEnter();// returns a valid iterator if ID is used already ... otherwise returns 'end()'std::list< Student >::iterator existID( std::list< Student >& term, const std::string& ID );// adds Student records to end of list of Student records ... 'term'// gets input from keyboard ...int newStud( std::list< Student >& term );// shows (to console screen) all student records in list container ... 'term'void viewStuds( const std::list< Student >& term );// file all records in memory ... create/overwrite file with name 'THIS_TERM'int fileStuds( const std::list< Student >& term );// reads in all Student records from file 'THIS_TERM' ... if it exists// returns -1 if no file exists; else returns the number of records readint readStuds( std::list< Student >& term );// returns 'true' if a record was edited or erased; otherwise returns falsebool editStud( std::list< Student > &term );int main() ////////////////////////// BEGIN MAIN ///////////////////////////////{ using namespace std; // create a 'fall list' to hold student names and ids for the 'Fall Term' // also holds number of records, via 'fall.size()' list < Student > fall; // now get all records from file ... if it exists ? int count = readStuds( fall ); if( count >= 0 ) cout << count << " student record(s) read into memory ..." << endl; else cout <<"(The file will be created when some student records exist.)" <<endl; bool changes = false; // set file 'update flag' to initial value ... for( ;; ) // loop forever ... until break ... { int reply = takeInStr( MENU ); if( reply == '1' || reply == 'V' ) // View ... viewStuds( fall ); else if( reply == '2' || reply == 'A' ) // Add ... from keyboard { int numStuds = newStud( fall ); cout << endl << numStuds << " student record(s) added ..." << " The total number of student records now is " << fall.size() << endl; if( numStuds ) // if >0 added ... update bool variable changes changes = true; } else if( reply == '3' || reply == 'S' ) // Sort ... but DON'T update // 'changes' unless 'data filed' { reply = takeInStr( "\nSort by id or name (i/n) ? " ); if( reply == 'I' ) { fall.sort(compare_id); // using case sensitive id's to sort ... cout << "Now sorted in memory by id. "; } else if( reply == 'N' ) { fall.sort(compare_nocaseName); // using case insensitive names cout << "Now sorted in memory by name. "; } else { cout << "Ok ... no new sort done here ...\n"; continue; } reply = takeInStr( "Update file (y/n) ? " ); if( reply == 'Y' ) { fileStuds( fall ); changes = false; cout << "File updated ...\n"; } else cout << "File NOT updated ...\n"; } else if( reply == '4' || reply == 'E' ) { if( editStud( fall ) ) changes = true; } else if( reply == '5' || reply == 'L' ) // Load/Read file into memory ... { int condition = readStuds( fall ); if( condition >= 0 ) { cout << "\nThere were " << condition << " student records read into memory from file." << endl; changes = false; } } else if( reply == '6' || reply == 'U' ) // Update file from memory ... { if( !changes ) cout << "\nNo changes to file ..." << endl; else { reply = takeInStr( "Are you sure you want to update" " the file (y/n) ? " ); if( reply == 'Y' ) { if( fileStuds( fall ) != (int)fall.size() ) cout << "\nUNEXPECTED ERROR! NOT all records were filed!" << "\nTry again ... If Error persits call IT." << endl; else { changes = false;// update file flag ... cout << "File write operation confirmed." << endl; } } } } else if( reply == '7' || reply == 'X' ) // eXit main show MENU/loop ... { // and ... if( changes ) // then ... { reply = takeInStr( "Are you sure you want to update" " the file (y/n) ? " ); if( reply == 'Y' ) { static int trys = 0; if( fileStuds( fall ) != (int)fall.size() ) { cout << "\nUNEXPECTED ERROR! NOT all records were filed!" << "\nTry again ... If Error persits call IT." << endl; ++trys; if( trys < 2 ) continue; } else { changes = false;// update file flag ... cout << "File write operation confirmed." << endl; } } } break; // and do exit program routine ... } else { cout << "\nChoice NOT implemented yet ...\n"; } // end of if( reply == ? ) 'switch' structure ... } // end of main 'forever loop' ... // debug exit routine ... ifstream ftest( THIS_TERM ); // recall 'THIS_TERM' is a Global variable if( !ftest ) { cout << "\nError attempting to open file " << THIS_TERM << " ...\n"; pauseForEnter(); } else // if reach here ... { ftest.close(); // first close file found ok above ... // then ... proceed ... to open the file in a system text editor ... // if you have a Win OS ... show structure of file if( 'Y' == takeInStr( "Show in notepad {y/n) ? " ) ) { string tmpSee = "notepad "; tmpSee += THIS_TERM; system( tmpSee.c_str() ); } }} ///////////////////////////////// END MAIN ///////////////////////////////////int takeInStr( const std::string& msg ){ std::cout << msg << std::flush; int reply = toupper( std::cin.get() ); std::cin.sync(); return reply;}void pauseForEnter(){ takeInStr( "\nPress 'Enter' to continue ... " );}// returns a valid iterator if ID is used already ... otherwise returns 'end()'std::list< Student >::iterator existID( std::list< Student >& term, const std::string& ID ){ std::list < Student > :: iterator it; for( it = term.begin(); it != term.end(); ++it ) if( it->get_id() == ID ) return it; // else ... return it; // returns term.end() ...}// adds Student records to end of list of Student records ... 'term'// gets input from keyboard ...int newStud( std::list< Student >& term ){ std::cout << "\nEnter an empty record to exit this 'Input Loop' ..." << std::endl; int count = 0; std::string nam, num; for( ;; ) // loop forever until break ... { std::cout << "\nID : "; getline( std::cin, num ); if( existID( term, num ) != term.end() ) { std::cout << "\nThat 'id' " << num << " already exits ... " << std::endl; continue; // from the top of the forever loop right now } std::cout << "Name : "; getline( std::cin, nam ); if( nam == "" || num == "") break; int reply = takeInStr( "Add or Redo (a/r) ? " ); if( reply != 'A' ) { std::cout << "Aborted ..." << std::endl; continue; } // ok ... create and add this record to the end of the list ... term.push_back( Student( nam, num )); ++count; std::cout << "Added " << count << " ..." << std::endl; } return count; // i.e. the count of added new students ...}// shows (to console screen) all student records in list container ... 'term'void viewStuds( const std::list< Student >& term ){ std::list < Student > :: const_iterator it; int i = 0; std::cout << std::endl; // leading blank line ... for( it = term.begin(); it != term.end(); ++it ) { std::ostringstream oss; oss << "list(" << std::setw(3) << std::setfill('0') << ++i << "): " << *it; std::cout << std::left << std::setw(39) /*<< setfill(' ')*/ << oss.str(); if( i % 2 == 0 ) std::cout << std::endl; // print 2 per line ... } if( i % 2 == 1 ) std::cout << std::endl; // if only a half line ... go to a new line}// file all records in memory ... create/overwrite file with name 'THIS_TERM'int fileStuds( const std::list< Student >& term ){ std::ofstream fout( THIS_TERM ); // recall 'THIS_TERM' is a Global variable if( !fout ) { std::cout << "\nError attempting to open file " << THIS_TERM << std::endl; return -1; // report error condition ... } // else ... std::list < Student > :: const_iterator it; int i = 0; for( it = term.begin(); it != term.end(); ++it, ++i ) fout << it->get_name() << "," << it->get_id() << std::endl; fout.close(); if( i == (int)term.size() ) std::cout << "\nAll " << i << " records filed ok." << std::endl; else std::cout << "\nOnly " << i << " of " << term.size() << " records were written ..." << std::endl; return i; // report success ... i.e. report count of records filed}// reads in all Student records from file 'THIS_TERM' ... if it exists// returns -1 if no file exists; else returns the number of records readint readStuds( std::list< Student >& term ){ std::ifstream fin( THIS_TERM ); // recall THIS_TERM is a Global variable if ( !fin ) { std::cout << "Error attempting to open file " << THIS_TERM << " ... Perhaps it dosen't exist yet?" << std::endl; return -1; // report error condition ... } // else ... check existing term.size() first before re-setting? if( term.size() ) // i.e. if not == 0 ... { std::cout << "\nDo you want over-write the " << term.size(); int reply = takeInStr( " records in memory (y/n) ? " ); if( reply != 'Y' ) { std::cout << "Aborted ... " << std::flush; return 0; } // if reach here ... std::cout << "Ok ... will over-write the " << term.size() << " records in memory ... " << std::flush; } // if reach here ... term.clear(); // set to empty list std::string nam, num; int i; for( i = 0; getline( fin, nam, ',' ); ++i ) // get 1st string (up to ',') { getline( fin, num, '\n' ); // then get rest of line (up to '\n') term.push_back( Student(nam, num) ); // construct and add new Student } fin.close(); return i; // report success? ... i.e. return the record count ...}// returns 'true' if a record was edited or erased; otherwise returns falsebool editStud( std::list< Student > &term ){ std::cout << "\nNote: just enter an empty record to exit this 'Edit/Erase Function'" << "\nOk ... now enter the ID of the student record to edit : " << std::flush; std::string idStr, nam; getline( std::cin, idStr ); std::list< Student >::iterator i, index; i = existID( term, idStr ); if( i == term.end() ) { std::cout << "This '" << idStr << "' does not exist." << std::endl; return false; } // else ... show ... and ask if ok to edit ... std::cout << "Name : " << i->get_name() << std::endl << "ID : " << i->get_id() << std::endl; int reply = takeInStr( "Abort or Edit/Erase (a/e) ? " ); if( reply != 'E' ) { std::cout << "Aborted ... " << std::endl; return false; } reply = takeInStr( "\nDo you want to erase this record (y/n) ? " ); if( reply == 'Y' ) { term.erase( i ); std::cout << "Erased ...\n"; return true; } // else ... ok ... so will edit id ... then name std::cout << "\nOk ... will edit ... Recall ...\n" << "Just enter an 'empty string' to abort/exit this edit ... " << "\nEnter NEW ID : "; getline( std::cin, idStr ); index = existID( term, idStr ); if( index != term.end() && index != i ) // exclude 'i' so can edit 'i' { std::cout << "\nThe ID '" << idStr << "' already exits ... " << std::endl; return false; // exit to menu now ... } // ok ... get new name ... std::cout << "Enter NEW Name : "; getline( std::cin, nam ); if( nam == "" || idStr == "" ) { std::cout << "Aborted ..." << std::endl; return false; } reply = takeInStr( "Ok or Redo (o/r) ? " ); if( reply != 'O' ) // cap 'O' ... as in Ok { std::cout << "Aborted ..." << std::endl; return false; } // ok ... so ... go ahead and edit i->set_name( nam ); i->set_id( idStr ); std::cout << "Edited ..." << std::endl; return true;}
Bob Jones,1Suzy McQueen,2Tim Horton,3Bob Jones,4Suzy McQueen,5Jane Thomas,10Jane Thomas,6
/* Student_Clist.c */ /* this version 2015-06-20 *//* A simple example of processing Student records ... using my Clist ... an emulation of the C++ library list container ... to hold each 'Student' object/record/Clist_member See MENU below to see what this program does ... Note: * this program allows only unique student id's for each record * this program is set to update its file, (if there were any changes), before quitting*/#include "readWord.h" /* includes stdio.h, stdlib.h, string.h, etc... *//* Globals ... */#define THIS_TERM "fall.txt" /* file name for this term's records */#define MENU "\n" \ " 1. V iew all records in memory at present\n" \ " 2. A dd a new student name and id\n" \ " 3. S ort student records\n" \ " 4. E dit/E rase a student record\n" \ " 5. L oad in student records from file\n" \ " 6. U pdate file with records currently in memory\n" \ " 7. e X it program\n\n" \ "Your choice (1..7) : "typedef struct myStudent{ char* name; char* id; struct myStudent* next;} Student ;#define List Student /* equate */typedef List* pList;#define pStudent pList /* equate */#define clearStudent clearLrec /* equate */void clearStudent( pStudent p ){ free( p->id ); free( p->name );}/* Ok ... now can ... */#include "Clist.h"/* ... and then can ... */#include "Clist_func's.h"/* Note: this name comparison is NOT case sensitive ... Also note: if names are 'same' the sorts by id */int cmpNamesIgnoreCase( const pStudent x, const pStudent y ){ const char *a = x->name, *b = y->name; int test; while( *a && *b && tolower(*a) == tolower(*b) ) ++a, ++b ; /* ok ... now check end conditions ... */ test = tolower(*a) - tolower(*b) ; if( test ) return test; /* else ... names equal since test == 0 above ... so ... */ return strcmp(x->id, y->id);}/* to permit sorting by id */int cmpIDs( const pStudent a, const pStudent b ){ return strcmp(a->id, b->id );}/* functions used by main to process a list of Student records */int takeInChr( const char* msg );char* takeInStr( const char* msg, const char* delimits );void pauseForEnter();pStudent existID( Clist* term, const char* ID );int newStud( Clist* term );void viewStuds( const Clist* term );int fileStuds( const Clist* term );int readStuds( Clist* term );int editStud( Clist* term );int sortAndFile( Clist* term );int update( Clist* term );int doExit( Clist* term );char* toCapsOnFirstLets( char* str ){ char* p = str; char prev = ' '; while( *p ) { if( prev == ' ' ) *p = toupper( *p ); prev = *p; ++p; } return str;}int main() /* //////////// BEGIN MAIN /////////////////// */{ FILE* ftest; int count, changes = 0, /* set file 'changes' flag to initial value */ done = 0; /* create a 'fall list' to hold student names and ids for the 'Fall Term' also holds number of records, via 'fall.size' */ Clist fall; initClist( &fall ); /* now get all records from file ... if it exists ? */ count = readStuds( &fall ); if( count >= 0 ) printf( "%d student record(s) read into memory ...\n", count ); else puts( "(The file will be created when some student records exist.)" ); while( !done ) { switch( toupper( takeInChr( MENU ) ) ) { case '1' : case 'V' : /* View ... */ viewStuds( &fall ); break; case '2' : case 'A' : /* Add ... from keyboard */ { int numNewStuds = newStud( &fall ); printf( "\n%d student record(s) added ... " "The total number of student records now is %d\n", numNewStuds, fall.size ); if( numNewStuds ) /* if >0 added ... update bool variable changes */ changes = 1; } break; case '3' : case 'S' : /* Sort ... but DON'T update changes' unless 'data filed' */ { int val = sortAndFile( &fall ); if( val == 2 ) changes = 0; else if( val == 1 ) changes = 1; } break; case '4' : case 'E' : if( editStud( &fall ) ) changes = 1; break; case '5' : case 'L' : /* Load/Read file into memory */ { int num = readStuds( &fall ); if( num >= 0 ) { printf( "\nThere were %d student records read into memory " "from file.\n", num ); changes = 0; /* reset so will match present file ... */ } } break; case '6' : case 'U' : /* Update file from memory */ if( !changes ) puts( "\nNO changes ... so file NOT updated ..." ); else if( update( &fall ) ) changes = 0; break; case '7' : case 'X' : /* eXit main show MENU/loop */ if( toupper( takeInChr( "DO YOU REALLY WANT TO EXIT (y/n) ? " ) ) == 'Y' ) { done = 1; if( changes ) /* and then ... */ if( !doExit( &fall ) ) done = 0; /* so will NOT exit for loop ... */ } break; default : puts( "\nChoice NOT implemented yet ..." ); } /* end of if( reply == ? ) 'switch' structure ... */ } /* end of main 'forever loop' ... */ /* debug exit routine ... */ ftest = fopen(THIS_TERM, "r"); /* recall 'THIS_TERM' is a Global variable */ if( !ftest ) { printf( "\nError attempting to open file %s ...", THIS_TERM ); pauseForEnter(); } else /* if reach here ... */ { fclose( ftest ); /* first close file found ok above ... */ /* then ... proceed ... to open the file in a system text editor ... if you have a Win OS ... show structure of file */ if( 'Y' == toupper( takeInChr("Show in notepad (y/n) ? ") ) ) system( "notepad " THIS_TERM ); /* compiler concat's strings */ } return 0;} /* ///////////////////// END MAIN ///////////////////// */int takeInChr( const char* msg ){ int chr; fputs( msg, stdout ); fflush( stdout ); chr = getchar(); if( chr != '\n' ) while( getchar() != '\n' ) ; /* flush stdin ... */ return chr;}void pauseForEnter(){ takeInChr( "\nPress 'Enter' to continue ... " );}char* takeInStr( const char* msg, const char* delimits ){ char c; fputs( msg, stdout ); fflush( stdout ); return readWord( stdin, 32, delimits, &c );}/* returns a valid iterator if ID is used already ... otherwise returns 'end()' */pStudent existID( Clist* term, const char* ID ){ pStudent it; for( it = term->start; it != NULL; it = it->next ) if( strcmp(it->id, ID) == 0 ) return it; /* else ... */ return it; /* returns NULL ... */}/* adds Student records to end of list of Student records ... 'term' gets input from keyboard ... */int newStud( Clist* term ){ int count = 0; Student rec; puts( "\nNote: Enter quit (for ID) to exit this 'Input Loop' ..." ); for( ; ; ) /* loop forever until break ... */ { rec.id = takeInStr( "\nID (a string) : ", "\n" ); if( strcmp(rec.id, "quit") == 0 ) { free(rec.id); return count; } if( existID( term, rec.id ) != NULL ) { printf( "\nThat 'id' %s already exits ...\n", rec.id ); free( rec.id ); continue; /* from the top of the forever loop right now */ } rec.name = takeInStr( "Name : ", "\n" ); toCapsOnFirstLets( rec.name ); if( toupper( takeInChr( "Add or Redo (a/r) ? " ) ) != 'A' ) { puts( "Aborted ..." ); clearStudent( &rec ); continue; } /* ok ... create and add this record to the end of the list ... */ push_backClist( term, &rec ); ++count; printf( "Added %d ...\n", count ); } return count; /* i.e. the count of added new students ... */}/* shows (to console screen) all student records in list container ... 'term' */void viewStuds( const Clist* term ){ pStudent it; int i = 0; putchar( '\n' ); /* leading blank line ... */ for( it = term->start; it != NULL; it = it->next ) { char buf[256]; sprintf( buf, "(%03d): %s, %s", ++i, it->name, it->id ); printf( "%-30s", buf ); if( i % 2 == 0 ) putchar( '\n' ); /* print 2 per line ... */ } if( i % 2 == 1 ) putchar( '\n' ); /* if only a half line, go to a new line */ fflush( stdout );}/* file all records in memory ... create/overwrite file with name 'THIS_TERM' */int fileStuds( const Clist* term ){ FILE* fout = fopen( THIS_TERM, "w" ); /* recall 'THIS_TERM' is a Global variable */ if( !fout ) { printf( "\nError attempting to open file %s\n", THIS_TERM ); return -1; /* report error condition ... */ } else { pList it; int i = 0; for( it = term->start; it != NULL; it = it->next, ++i ) fprintf( fout, "%s,%s\n", it->name, it->id ); fclose( fout ); if( i == term->size ) printf( "\nAll %d records filed ok.\n", i ); else printf( "\nOnly %d of %d records were written ...\n", i, term->size ); return i; /* report success ... i.e. report count of records filed */ }}/* reads in all Student records from file 'THIS_TERM' ... if it exists returns -1 if no file exists; else returns the number of records read */int readStuds( Clist* term ){ int i; char c; Student rec; FILE* fin = fopen( THIS_TERM, "r" ); /* recall THIS_TERM is a Global variable */ if( !fin ) { printf( "Error attempting to open file %s" " ... Perhaps it dosen't exist yet?\n\n", THIS_TERM ); return -1; /* report error condition ... */ } /* else ... check existing term size first before re-setting? */ if( term->size ) /* i.e. if not == 0 ... */ { printf( "\nDo you want over-write the %d", term->size ); if( toupper( takeInChr(" records in memory (y/n) ? ") ) != 'Y' ) { fputs( "Aborted ... ", stdout ); fflush( stdout );; return 0; } /* if reach here ... */ printf( "Ok ... will over-write the %d records in memory ... ", term->size ); fflush( stdout ); } /* if reach here ... */ clearClist( term ); /* set to empty list */ for( i = 0; (rec.name = readWord( fin, 32, ",", &c )); ++i ) /* get 1st string (up to ',') */ { rec.id = readWord(fin, 8, "\n", &c); /* then get rest of line (up to '\n') */ push_backClist( term, &rec ); } fclose( fin ); return i; /* report success? ... i.e. return the record count ... */}/* returns 1 if a record was edited or erased ... otherwise returns 0 */int editStud( Clist* term ){ pStudent i, index; char *idStr, *nam; const char* prompt = "\nOk ... will edit ... Recall ... " "just enter quit to abort/exit this edit." "\nEnter NEW ID : "; const char* prompt2 = "\nNote: just enter quit to exit this 'Edit/Erase Function'" "\nOk ... now enter the ID of the student record to edit/erase : " ; idStr = takeInStr( prompt2, "\n" ); if( strcmp(idStr, "quit") == 0 ) { free(idStr); return 0; } i = existID( term, idStr ); if( i == NULL ) { printf( "This '%s' does not exist.\n", idStr ); free( idStr ); return 0; } /* else ... show ... and ask if ok to edit ... */ printf( "Name : %s\n" "ID : %s\n", i->name, i->id ); if( toupper( takeInChr("Abort or Edit/Erase (a/e) ? ") ) != 'E' ) { puts( "Aborted ... " ); free( idStr ); return 0; } if( toupper( takeInChr("Do you want to erase this record (y/n) ? ") ) == 'Y' ) { eraseClist( term, i ); puts( "Erased ..." ); free( idStr ); return 1; } /* else ... ok ... so will edit id ... then name */ free( idStr ); /* now get new id string ... */ idStr = takeInStr( prompt, "\n" ); if( strcmp(idStr, "quit") == 0 ) { free(idStr); return 0; } index = existID( term, idStr ); if( index != NULL && index != i ) /* exclude 'i' so can edit 'i' */ { printf( "\nThe ID '%s' already exits ...\n", idStr ); free( idStr ); return 0; /* exit to menu now ... */ } /* ok ... get new name ... */ nam = takeInStr("Enter NEW Name : ", "\n" ); if( nam[0] == 0 || idStr[0] == 0 ) { puts( "Aborted ..." ); free( nam ); free( idStr ); return 0; } if( toupper(takeInChr("Ok or Redo (o/r) ? ")) != 'O' ) /* upper case 'O' ... as in Ok */ { puts( "Aborted ..." ); free( nam ); free( idStr ); return 0; } /* ok ... so ... go ahead and edit, but first ... */ clearStudent( i ); i->name = nam; i->id = idStr; puts( "Edited ..." ); return 1;}int sortAndFile( Clist* term ){ int changes = 1; switch( toupper( takeInChr( "\nSort by id or name (i/n) ? " ))) { case 'I' : msortClist( term, cmpIDs ); /* case sensitive id's in sort */ fputs( "Now sorted in memory by id. ", stdout ); break; case 'N' : msortClist( term, cmpNamesIgnoreCase ); /* case insensitive */ fputs( "Now sorted in memory by name. ", stdout ); break; default: puts( "Ok ... no new sort done here ..." ); changes = 0; /* were NO changes, file NOT updated */ } if( changes ) { if( toupper(takeInChr( "Update file NOW (y/n) ? " ) ) == 'Y' ) { fileStuds( term ); puts( "File was updated ..." ); changes = 2; /* were changes BUT file was updated */ } else puts( "File was NOT updated ..." ); } return changes;}int update( Clist* term ){ if( toupper( takeInChr( "Are you sure you want to update" " the file (y/n) ? " ) ) == 'Y' ) { if( fileStuds( term ) != term->size ) { puts( "\nUNEXPECTED ERROR! NOT all records were filed!" "\nTry again ... If Error persits call IT." ); return 0; } /* else ... */ puts( "File write operation confirmed." ); return 1; } /* else ... */ return 0;}int doExit( Clist* term ){ int exitValue = 0; if( toupper( takeInChr( "Update file before exiting (y/n) ? " ) ) == 'Y' ) { static int trys = 0; if( fileStuds( term ) != term->size ) { puts( "\nUNEXPECTED ERROR! NOT all records were filed!" "\nTry again ... If Error persists call 'IT department'." ); ++trys; if( trys == 2 ) exitValue = -1; } else { puts( "File write operation confirmed." ); exitValue = 1; } } return exitValue;}
