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  1. Prepare
  2. C
  3. Introduction
  4. Functions in C
  5. Discussions

Functions in C

  • arkadianova
     + 0 comments

    Since this problem is still at the basic stage (no loops, macros, or conditionals introduced yet), I thought I'd share a solution that sticks to the fundamentals: just functions and some simple math.

    I’ve seen many solutions here that use macros or ternary operators, which are definitely efficient, but I wanted to explore if we can solve it differently.

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

int max(int x, int y);
int max_of_four(int a, int b, int c, int d);

int main() {
    int a, b, c, d;
    scanf("%d %d %d %d", &a, &b, &c, &d);
    int ans = max_of_four(a, b, c, d);
    printf("%d", ans);
    
    return 0;
}

int max(int x, int y) {
    return (x + y + abs(x - y)) / 2;
}

int max_of_four(int a, int b, int c, int d) {
    return max(max(a, b), max(c, d));
}