Interget overflow check program

signed_int_addition.c

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

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

int add(int x, int y) {
    int result = x + y;
    if ((x > 0 && y > 0 && result < 0) || (x < 0 && y < 0 && result > 0)) {
        printf("addition overflow\n");
        printf("%d\n", result);
        exit(EXIT_FAILURE);
    }
    return result;
}

int main() {
    // overflow case
    int x = 2147483647; 
    int y = 1;  
    printf("%u\n", add(x, y));

    return 0;
}

signed_int_subtraction.c

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

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

int sub(int x, int y) {
    int result = x - y;
    if ((x>0&&y<0&&result<0)||(x<0&&y>0&&result>0)) {
        printf("subtraction overflow\n");
        printf("%d\n", result);
        exit(EXIT_FAILURE);
    }
    return result;
}

int main() {
    // overflow case
    int x = 2147483647 ;
    int y = -1;
    printf("%d", sub(x, y));

    return 0;
}

unsigned_int_addition.c

/*
 * 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;
}

unsigned_int_subtraction.c

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

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

unsigned int sub(unsigned int x, unsigned int y) {
    unsigned int result = x - y;
    if (result > x && result > y) {
        printf("subtraction overflow\n");
        printf("%u\n", result);
        exit(EXIT_FAILURE);
    }
    return result;
}

int main() {
    // overflow case
    unsigned int x = 1u;
    unsigned int y = 2u;
    printf("%u", sub(x, y));

    return 0;
}