/*
 * unsigned int addition overflow test
 * exit(EXIT_FAILURE) if result overflows
 * print the correct value if everything is good.
*/

#include <stdio.h>
#include <stdlib.h>

unsigned int add(unsigned int x, unsigned int y) {
    unsigned int result = x + y;
    if (result < x && result < y) {
        printf("addition overflow\n");
        printf("%u\n", result);
        exit(EXIT_FAILURE);
    }

    return result;
}

int main() {
    // overflow case
    unsigned int x = 4294967295u;
    unsigned int y = 1u;  
    printf("%u\n", add(x, y));

    return 0;
}