Program To COpy File Cryptography Lab

#include<stdio.h> #include<conio.h> #include<stdlib.h> void main() {     FILE *fs,*ft;     char ch;     clrscr();     fs = fopen("vk.txt","r");     if(fs==NULL)     {     printf("Cannot open source file ! Press key to exit.");     getch();     exit(0);     }     ft = fopen("ck.txt","w");     if(ft==NULL)     {     printf("Cannot copy file ! Press key to exit.");     fclose(fs);     getch();     exit(0);     }     while(1)     {     ch = getc(fs);     if(ch==EOF)     {     break;     }     else     putc(ch,ft);     }     printf("File copied succesfully!");     fclose(fs);     fclose(ft); }