#include <iostream>
#include <string>
using namespace std;
int main(int argc, char** argv)
{
string a = "ZZH";
cout<<a<<endl;
a += "NB";
cout<<a<<endl;
cout<<a.substr(0,3)<<endl;
cout<<a.substr(3)<<endl;
cout<<a.substr(0,100000)<<endl;
printf("%s\n",a.c_str());
string b = "ZZK";
if(b > a)
{
cout<<"Yes b > a"<<endl;
}
string c = "xcv";
b.insert(0,c);
cout<<b<<endl;
c.erase(c.begin()+1);
cout<<c<<endl;
c.erase(c.begin(),c.end());
if(0 == c.size())
{
cout<<"C 已经被删除完了"<<endl;
}
c.clear();
string str1 = "asdfghjklasd";
string str2 = "fgh";
string str3 = "qeqe";
cout<<str1.find(str2)<<endl;
cout<<str1.find(str3)<<endl;
str1.replace(3,3,str3);
cout<<str1<<endl;
return 0;
}