EOF

[vgoel38]

#include<stdio.h>
int main()
{
    char ch;
    scanf("%c",&ch);
    while(ch!=EOF)
    {
        printf("%c",ch);
        scanf("%c",&ch);
    }
}

This program gives runtime error. But if i replace scanf statement by getchar(), it runs successfully. Why?

[Catfish2]

You are misusing scanf(). You are discarding its return value (which is an int by the way). Therefore the program will not stop when the user gives it a Control-D.

#include <stdio.h>

int main()
{
    char ch;

    while(scanf("%c",&ch) != EOF)
        printf("%c",ch);
}

Edit: hmm.