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Program to Copy Contents of One File to Another 

 
#include <stdio.h>
void main()
{
FILE *fp1, *fp2;
char ch;
fp1 = fopen("abc.txt", "r");
fp2 = fopen("xyz.txt", "w");
while((ch = getc(fp1)) != EOF)
putc(ch, fp2);
fclose(fp1);
fclose(fp2);
getch();
}

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