Write a C program to reverse the first n characters in a file, where n is given by the user.

Write a C program to reverse the first n characters in a file, where n is given by the user.

Program Code:

#include <stdio.h>

#include<string.h>

int main()

{

FILE *fp;

char a[50];

int i,n,count=0;

fp=fopen("program.txt","r");

if(fp==NULL)

{

printf("\n file opening problem");

return;

}

printf("\n enter the no of charcters to reverse: ");

scanf("%d",&n);

while(count<n)

{

a[count]=fgetc(fp);

count++;

}

a[count]='\0';

fputs(strrev(a),stdout);

fclose(fp);

getch();

}