why this code is not returning anything in C

Question

#include<stdio.h>
int main()
{
    int u1,u2;
    
    printf("Enter two num : ");
    scanf("%d %d",&u1,&u2);

    return u1 == 30 || u2 == 30 || (u1+u2 == 30);
}

Question is: Write a C program to check two given integers, and return true if one of them is 30 or if their sum is 30. I am new to Programming, If anyone Help me out what's wrong in this code. It should return 1 or True

Answer 1

The return value is mapped to the process exit code. Normally 0 is success, so this will have a failure if that is logically true.

You may want to put this in a proper function and write a printf to display it:

#include <stdio.h>

int compare()
{
    int u1,u2;
    
    printf("Enter two num : ");
    scanf("%d %d",&u1,&u2);

    return u1 == 30 || u2 == 30 || (u1+u2 == 30);
}

int main(int argc, char** argv) {
  printf("Result=%d\n", compare());

  return 0;
}

Tip: Instead of taking interactive input notice how argv is like right there awaiting input as command-line arguments!