简单的电信计费系统C源代码.zip

#include<stdio.h> #include<conio.h> #include<ctype.h> #include<windows.h> #include<stdlib.h> struct subscriber { char phonenumber[20]; char name[50]; float amount; }s; void addrecords(); void listrecords(); void modifyrecords(); void deleterecords(); void searchrecords(); void payment(); char get; int main() { int password; int phonenumber; char choice; system("cls"); printf("\n\n\n\n\n\n\n\n\n***********************************************************"); printf("\n\t\t------WELCOME TO THE TELECOM BILLING SYSTEM---"); printf("\n\t\t***************************************************************"); Sleep(2000); getch(); system("cls"); while (1) { system("cls"); printf("\n Enter\n A : for adding new records.\n L : for list of records"); printf("\n M : for modifying records.\n P : for payment"); printf("\n S : for searching records."); printf("\n D : for deleting records.\n E : for exit\n"); choice=getche(); choice=toupper(choice); switch(choice) { case 'P': payment();break; case 'A': addrecords();break; case 'L': listrecords();break; case 'M': modifyrecords();break; case 'S': searchrecords();break; case 'D': deleterecords();break; case 'E': system("cls"); printf("\n\n\t\t\t\tTHANK YOU"); printf("\n\n\n\n\n:\n\tFOR USING OUR SERVICE"); Sleep(2000); exit(0); break; default: system("cls"); printf("Incorrect Input"); printf("\nAny key to continue"); getch(); } } } void addrecords() { FILE *f; char test; f=fopen("file.ojs","ab+"); if(f==0) { f=fopen("file.ojs","wb+"); system("cls"); printf("please wait while we configure your computer"); printf("/npress any key to continue"); getch(); } while(1) { system("cls"); printf("\n Enter phone number:"); scanf("%s",&s.phonenumber); printf("\n Enter name:"); fflush(stdin); scanf("%[^\n]",&s.name); printf("\n Enter amount:"); scanf("%f",&s.amount); fwrite(&s,sizeof(s),1,f); fflush(stdin); system("cls"); printf("1 record successfully added"); printf("\n Press esc key to exit, any other key to add other record:"); test=getche(); if(test==27) break; } fclose(f); } void listrecords() { FILE *f; int i; if((f=fopen("file.ojs","rb"))==NULL) exit(0); system("cls"); printf("Phone Number\t\tUser Name\t\t\tAmount\n"); for(i=0;i<79;i++) printf("-"); while(fread(&s,sizeof(s),1,f)==1) { printf("\n%-10s\t\t%-20s\t\t$ %.2f /-",s.phonenumber,s.name,s.amount); } printf("\n"); for(i=0;i<79;i++) printf("-"); fclose(f); getch(); } void deleterecords() { FILE *f,*t; int i=1; char phonenumber[20]; if((t=fopen("temp.ojs","w+"))==NULL) exit(0); if((f=fopen("file.ojs","rb"))==NULL) exit(0); system("cls"); printf("Enter the phone number to be deleted from the Database"); fflush(stdin); scanf("%[^\n]",phonenumber); while(fread(&s,sizeof(s),1,f)==1) { if(strcmp(s.phonenumber,phonenumber)==0) { i=0; continue; } else fwrite(&s,sizeof(s),1,t); } if(i==1) { system("cls"); printf("Phone number \"%s\" not found",phonenumber); remove("file.ojs"); rename("temp.ojs","file.ojs"); getch(); fclose(f); fclose(t); main(); } remove("file.ojs"); rename("temp.ojs","file.ojs"); system("cls"); printf("The Number %s Successfully Deleted!!!!",phonenumber); fclose(f); fclose(t); getch(); } void searchrecords() { FILE *f; char phonenumber[20]; int flag=1; f=fopen("file.ojs","rb+"); if(f==0) exit(0); fflush(stdin); system("cls"); printf("Enter Phone Number to search in our database"); scanf("%s", phonenumber); while(fread(&s,sizeof(s),1,f)==1) { if(strcmp(s.phonenumber,phonenumber)==0) { system("cls"); printf(" Record Found "); printf("\n\nPhonenumber: %s\nName: %s\nAmount: $%0.2f\n",s.phonenumber,s.name,s.amount); flag=0; break; } else if(flag==1) { system("cls"); printf("Requested Phone Number Not found in our database"); } } getch(); fclose(f); } void modifyrecords() { FILE *f; char phonenumber[20]; long int size=sizeof(s); if((f=fopen("file.ojs","rb+"))==NULL) exit(0); system("cls"); printf("Enter phone number of the subscriber to modify:"); scanf("%[^\n]",phonenumber); fflush(stdin); while(fread(&s,sizeof(s),1,f)==1) { if(strcmp(s.phonenumber,phonenumber)==0) { system("cls"); printf("\n Enter phone number:"); scanf("%s",&s.phonenumber); printf("\n Enter name: "); fflush(stdin); scanf("%[^\n]",&s.name); printf("\n Enter amount: "); scanf("%f",&s.amount); fseek(f,-size,SEEK_CUR); fwrite(&s,sizeof(s),1,f); break; } } fclose(f); } void payment() { FILE *f; char phonenumber[20]; long int size=sizeof(s); float amt; int i; if((f=fopen("file.ojs","rb+"))==NULL) exit(0); system("cls"); printf("Enter phone number of the subscriber for payment"); scanf("%[^\n]",phonenumber); fflush(stdin); while(fread(&s,sizeof(s),1,f)==1) { if(strcmp(s.phonenumber,phonenumber)==0) { system("cls"); printf("\n Phone No.: %s",s.phonenumber); printf("\n Name: %s",s.name); printf("\n Current amount: %f",s.amount); printf("\n"); for(i=0;i<79;i++) printf("-"); printf("\n\nEnter amount of payment :"); fflush(stdin); scanf(" %f",&amt); s.amount=s.amount-amt; fseek(f,-size,SEEK_CUR); fwrite(&s,sizeof(s),1,f); break; } } system("cls"); printf("THANK YOU %s FOR YOUR PAYMENTS",s.name); getch(); fclose(f); }