overflow.c

#include <stdio.h>

int main(int argc, char** argv)
{
    int x;
    printf("Enter the number to count up to: ");
    if(scanf("%d", &x) != 1) {
        printf("I don't think you know what a number is\n");
        return -1;
    }

    printf("Your number was: %d\n", x);

    return 0;
}