Functions in C

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