#include<iostream>
#include<string>
using namespace std;
int main(){
string str; //使用属性测容量str.capacity()
cout<<str.capacity()<<endl;
string str1(5,'a'); //少于15个，至少申请个15容量
cout<<str1.capacity()<<endl; //以后多余容量就增加16个大小
str1.resize(3); //str.resize(3)重置字符个数，容量不变
cout<<str1<<endl;
cout<<str1.length()<<endl; //str.length()测字符串长度
cout<<str1.size()<<endl; //str.size()测字符个数
cout<<str1.capacity()<<endl;
string str2("abcde",3); //VC6.0是至少申请31个，以后每次增加32个
cout<<str2.capacity()<<endl;
system("pause");
return 0;
}