三目运算符

#include <iostream>
using namespace std;
int main() {    
    int a=10,b=20,c=0;
    c = (a>b?a:b);  //a>b返回a 否则b
    cout<<c<<endl;
    (a>b?a:b) = 100;
    cout<<"a="<<a<<endl<<"b="<<b<<endl;
    return 0;
}