Which Number Greater.c

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

max_of_four(int a, int b, int c, int d){
    if(a>b && a>c && a>d){
        return a;
    }
    else if(b>a && b>c && b>d){
        return b;
    }
    else if(c>a && c>b && c>d){
        return c;
    }
    else{
        return 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;
}