C++ //string字符串拼接

//string字符串拼接
#include <iostream>
#include<string>

using namespace std;


void test01()
{
    string str1 = "我";

    str1 += "爱学习";
    cout << "str1 = " << str1 << endl;

    str1 += '?';
    cout << "str1 = " << str1 << endl;

    string str2 = "LOL CF";
    str1 += str2;
    cout << "str1 = " << str1 << endl;



    string str3 = "I ";
    str3.append("love");
    cout << "str3 = " << str3 << endl;

    str3.append(" Game abced", 5);
    cout << "str3 = " << str3 << endl;

    //str3.append( str2);
    //str3.append(str2, 0, 3);//0的位置开始 截取3 LOL

    str3.append(str2, 4, 3);//截取 cf 
    cout << "str3 = " << str3 << endl;


}


int main()
{
    test01();

    system("pause");
}