/*Creating a file to store Students Data*/ /*Please use Dev C++ IDE while compiling this program*/ #include iostream #include fstream #include conio.h using namespace std; class student { private: char name[60], add[40]; int cl,rn,id; public: void getdata() { cout<<"Enter Your ID: "; cin>>id; cout<<"Name: "; cin>>name; cout<<"Address: "; cin>>add; cout<<"Class: "; cin>>cl; cout<<"Roll No: "; cin>>rn; } void display() { cout<<"ID: "<>d; while(!fio.eof()) { pos=fio.tellg(); fio.read((char*)&st,sizeof(st)); if(st.getid()==d) { cout<<"\n\n\t\tEnter New Details: \n\n"; st.getdata(); } fio.seekg(pos); fio.write((char*)&st,sizeof(st)); flag2=1; break; } if(flag2==0) { cout<<"\nRecord Not Found !!!"; } cout<<"\n\nRecord Modified\n\n"; fio.close(); cout<<"\n\nPress a Key: "; getch(); } void display_all() { student st; ifstream inFile; inFile.open("Stu.dat",ios::binary); if(!inFile) { cout<<"File could not be open !! Press any Key..."; getch(); return; } system("cls"); cout<<"\n\t\t\t* ** **************************** ** *\n"; cout<<"\t\t\t* ** * DISPLAY ALL RECORDS * ** *\n"; cout<<"\t\t\t* ** **************************** ** *\n\n\n\n"; while(inFile.read((char *) &st, sizeof(student))) { st.display(); cout<<"\n\n====================================\n"; } inFile.close(); cout<<"\n\nPress a Key: "; getch(); } int del_file() { ifstream f; f.open("Stu.dat",ios::binary); if(!f) { cout<<"File Not Found !!! Press any Key..."; getch(); f.close(); } else { f.close(); remove("Stu.dat"); return 1; } } void del_recd() { int rec; student st; ifstream f1("Stu.dat",ios::binary); ofstream f2("temp.dat",ios::out | ios::binary ); if(!f1) { cout<<"File could not be open !! Press any Key..."; getch(); return; } cout<<"\n\nEnter The ID To Delete The Record: "; cin>>rec; cout<>ch; switch(ch) { // Start switch case 1: { system("cls"); cout<<"\n\t\t\t* ** **************************** ** *\n"; cout<<"\t\t\t* ** **** ENTER RECORDS **** ** *\n"; cout<<"\t\t\t* ** **************************** ** *\n\n\n\n"; s1.getdata(); f1.open("Stu.dat",ios::app); f1.write((char*)&s1,sizeof(student)); f1.close(); cout<<"\n\n\t\t\tRecord Added With ID: "<>n; inFile.open("Stu.dat",ios::binary); if(!inFile) { cout<<"File could not be open !! Press any Key..."; getch(); return (1); } int flag=0; while(inFile.read((char *) &st, sizeof(student))) { if(st.getid()==n) { st.display(); flag=1; } } inFile.close(); if(flag==0) { cout<<"\n\n Record doesnot exist"; } cout<<"\n\nPress a Key: "; getch(); break; } case 4: { system("cls"); cout<<"\n\t\t\t* ** **************************** ** *\n"; cout<<"\t\t\t* ** * RECORD MODIFICATION * ** *\n"; cout<<"\t\t\t* ** **************************** ** *\n\n\n\n"; modify(); //Call To Function modify(); break; } case 5: { system("cls"); cout<<"\n\t\t\t* ** **************************** ** *\n"; cout<<"\t\t\t* ** *** DELETE RECORD *** ** *\n"; cout<<"\t\t\t* ** **************************** ** *\n\n\n\n"; del_recd(); //Call To Function del_recd(); cout<<"\n\nPress a Key: "; getch(); break; } case 6: { int p; p=del_file(); //Call To Function del_file(); if(p==1) { cout<<"\n\n\t\tThe File Stu.dat is Deleted"; cout<<"\n\n\tPress a Key: "; getch(); } break; } case 7: { system("cls"); cout<<"\n\n\n\t\t\tThank You !!!"; exit(1); } default: system("cls"); cout<<"Enter a valid choice!"; cout<<"\n\nPress a Key To Go Back To The Main Menu: "; getch(); } // End of switch } // End of while return 0; }