CODEWITHSUNDEEP
cexceptionstdin
VoidStar
VoidStar

Reputation: 984

How to "revive" stdin after input of wrong type

The code below works like expected if the user enters only integers.

#include <stdio.h>

int main()
{
    int input1, input2;
    int error;

    error = scanf("%d", &input1);
    if( !error)
        printf("Error: Your input was wrong\n");
    else
        printf("Your input was: %d\n", input1);

    error = scanf("%d", &input2);
    if( !error)
        printf("Error: Your input was wrong");
    else
        printf("Your input was: %d\n", input2);

}

However if the user types in abcd at the first prompt, the program prints out:

Error: Your input was wrong
Error: Your input was wrong

skipping the second scanf()
How can I "revive" stdin once an input has failed, so that it can be reused?

Upvotes: 0

Views: 60

Answers (1)

BLUEPIXY
BLUEPIXY

Reputation: 40145

if(!error){
    printf("Error: Your input was wrong\n");
    scanf("%*[^\n]");
} else
    printf("Your input was: %d\n", input1);

Upvotes: 3

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