C program to Copy the contents of one file into another using fputc

#include<stdio.h>
#include<process.h>

void main()
{
FILE *fp1,*fp2;
char a;
clrscr();

fp1=fopen("test.txt","r");
if(fp1==NULL)
    {
    puts("cannot open this file");
    exit(1);
    }

fp2=fopen("test1.txt","w");
if(fp2==NULL)
    {
    puts("Not able to open this file");
    fclose(fp1);
    exit(1);
    }

   do
    {
    a=fgetc(fp1);
    fputc(a,fp2);
    }while(a!=EOF);

fcloseall();
getch();
}

Output :

Content will be written successfully to file

Explanation of Program :

We have to files with us , we are opening one file in read mode and another file in write mode.

fp1=fopen("test.txt","r");

and

fp2=fopen("test1.txt","w");

It is better practice to check whether file is opened successfully or not using NULL check.

if(fp2==NULL)
     {
     //File is Not opened Successfully  
     }

If everything goes right then we are reading file character by character and writing on file character by character.

a=fgetc(fp1); //Reading Single Character

End of File is specified by EOF character, thus if we get EOF character then process of writing on the file will be terminated.

do {
  a=fgetc(fp1);
  fputc(a,fp2);
}while(a!=EOF);