std::string

/*************************************************************************
    > File Name: string.cpp
    > Author: lukey
    > Mail: lukey123@foxmail.com 
    > Created Time: Wed 10 Jun 2015 09:21:32 PM CST
 ************************************************************************/

#include<iostream>
//using namespace std;

int main(int argc, char* argv[])
{
    std::string str1 = "hello";
    std::string str2("world");
    std::cout << "str1:" << str1 << std::endl;
    std::cout << "str2:" << str2 << std::endl;
    std::string str3 = str1 + str2;
    std::cout << "str3:" << str3 << std::endl;
    std::string sub1 = str3.substr(0,5);
    std::string sub2 = str3.substr(8,2);
    std::string sub3 = str3.substr(8,8);
    std::string sub4 = str3.substr(10,2);
    std::cout << "sub1:" << sub1 << std::endl;
    std::cout << "sub2:" << sub2 << std::endl;
    std::cout << "sub3:" << sub3 << std::endl;
    std::cout << "sub4:" << sub4 << std::endl;
    
    
    return 0;
}