谁用这个三元操作符啊

#include<iostream>
using namespace std;
int num(int a,int b,int c){
    return a>b?(a>c?a:c):(b>c?b:c);
}
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    cout<<num(a,b,c);
}