#include <iostream>

#include <Windows.h>

#include <string>

using namespace std;

int main(void) {

string s1 = "武当派";

string s2 = "张三丰";

string s3 = "太极拳";

string s4;

s4 = s1 + s2; //武当派张三丰

cout << "s4=" << s4 << endl;

s4 = s4 + s3; //武当派张三丰太极拳

//相当于 s4 += s3;

cout << "s4=" << s4 << endl;

s4 += "第一式";

//等效于：s4 = s4 + "第一式";

cout << "s4=" << s4 << endl;

system("pause");

return 0;

}