Functions in C.c

#include <stdio.h>
int max_of_four(int a,int b,int c,int d){
   int max = 0;
   max = ( a > b) ? a : b;
   max = ( max > c) ? max : c;
   max = (max > d) ?  max : d;
    return max;
   
   
   
}

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;
}