Today's C File Program

File Program

#include<stdio.h>

#include<conio.h>

void main()

{

FILE *fp1, *fp2, *fp3;

fp1 = fopen("1.txt", "w");

fp2 = fopen("2.ppp", "w");

fp3 = fopen("3.xyz", "w");

fprintf(fp1, "Welcome to BCA");

fprintf(fp2, "Gujarat");

fprintf(fp3, "University");

fcloseall();

}

Header File Program

#include<stdio.h>

#include<conio.h>

#include"reverse.c"

void main()

{

long int no;

clrscr();

printf("\nEnter number: ");

scanf("%ld", &no);

printf("\n\nReverse number = %ld", reverse(no)) ;

getch();

}

Header File Name. reverse.c

long reverse(long int no)

{

long revno=0;

int rem;

while(no > 0)

{

rem = no % 10;

revno = revno * 10 + rem;

no = no / 10;

}

return revno;

}