Telephone

Telephone #include<stdio.h> #include<string.h> main() { FILE *t,*p; char another,choice; struct telephone { char name[30]; long int code; long int number; }; struct telephone data; char custname[30]; long int n; long int recsize; t=fopen("TELEPHONE.DAT","rb+"); if(t==NULL) { t=fopen("TELEPHONE.DAT","wb+"); if(t==NULL) { printf("The File can't open\n"); exit(); } } printf(" TELEPHONE DIRECTORY \n"); printf(" ******************* \n"); recsize=sizeof(data); while(1) { printf("\n\n"); printf("1.Add Records\n"); printf("2.List Records\n"); printf("3.Modify Records\n"); printf("4.Finding Number\n"); printf("5.Finding Name\n"); printf("6.Delete Records\n"); printf("0.Exit\n"); printf("Your Choice:"); fflush(stdin); choice=getche(); switch(choice) { case '1': fseek(t,0,SEEK_END); another='y'; while(another=='y') { printf("\nEnter Customer name,Code number and Telephone number\n"); scanf("%s %ld %ld",data.name,&data.code,&data.number); fwrite(&data,recsize,1,t); printf("Add another data(y/n):"); fflush(stdin); another=getche(); printf("\n"); } break; case '2': rewind(t); printf("\n"); printf("---------------------------------------------\n"); printf("| CUSTOMER | CODE | TELEPHONE |\n"); printf("---------------------------------------------\n"); rewind(t); while(fread(&data,recsize,1,t)==1) printf("| %-18s %-2ld %12ld |\n\n",data.name,data.code,data.number); printf("--------------------------------------------\n"); getch(); printf("\n"); break; case '3': another='y'; while(another=='y') { printf("\nEnter name of customer to modify:"); scanf("%s",custname); rewind(t); while(fread(&data,recsize,1,t)==1) { if(strcmp(data.name,custname)==0) { printf("\nEnter new name,code and telephone number\n"); scanf("%s %ld &ld",data.name,&data.code,&data.number); fseek(t,-recsize,SEEK_CUR); fwrite(&data,recsize,1,t); break; } } printf("Modify another record(y/n):"); fflush(stdin); another=getche(); printf("\n"); } break; case '4': another='y'; while(another=='y') { printf("\nEnter name of customer:"); scanf("%s",custname); rewind(t); while(fread(&data,recsize,1,t)==1) { if(strcmp(data.name,custname)==0) { printf("Telephone Number=%ld %ld\n",data.code,data.number); getch(); } } printf("Find another number(y/n)? "); fflush(stdin); another=getche(); printf("\n"); } break; case '5': another='y'; while(another=='y') { printf("\nEnter number of customer:"); scanf("%ld",&n); rewind(t); while(fread(&data,recsize,1,t)==1) { if(data.number==n) { printf("The Name is %s\n",data.name); getch(); } } printf("Find another name(y/n)? "); fflush(stdin); another=getche(); printf("\n"); } break; case '6': another='y'; while(another=='y') { printf("\nEnter name of customer to delete:"); scanf("%s",custname); p=fopen("TEMP.DAT","wb"); rewind(t); while(fread(&data,recsize,1,t)==1) { if(strcmp(data.name,custname)!=0) fwrite(&data,recsize,1,p); } fclose(t); fclose(p); remove("TELEPHONE.DAT"); rename("TEMP.DAT","TELEPHONE.DAT"); t=fopen("TELEPHONE","rb+"); printf("Delete another record(y/n):"); fflush(stdin); another=getche(); } break; case '0': printf("\n"); fclose(t); exit(); } } }