Question

How to validate input when a user has to choose only integers using scanf in C

Answer 1

#include <stdio.h>

int main()
{
    int number;

    printf("Choose only integers: ");

    if (scanf("%d", &number) != 1) {
        puts("Not an integer");
    }
    else {
        printf("You choose: %d\n", number);
    }
}



/*
run 1:

Choose only integers: 4
You choose: 4


run 2:

Choose only integers: w
Not an integer

*/

 

70+ SQL courses for beginners and professionals