String的用法

//StringµÄÓ÷¨ 
#include <bits/stdc++.h>
using namespace std;


int main(void){
int i;
string str("Bill Gates");

int len1 = str.length();
int len2 = str.size();
cout<<"String µÄ length ºÍ sizeÊÇ:"<<len1<<" "<<len2<<endl;

cout<<"String µÄ str.at(i)ÊÇ£º";
for(i = 0; i < len1; i++){
if(i % 2)
cout<<str.at(i)<<" ";
}
cout<<endl;

str.resize(len2 + 2, '6');
cout<<str<<endl;

//¿Õ¾Í·µ»Ø1£¬²»¿Õ·µ»Ø0 
if(!str.empty())
cout<<"str.empty()Åжϲ»¿Õ"<<endl; 


return 0;
}