C++中string的size,length,capacity三者到底有何区别求解

C++中string的size,length,capacity三者到底有何区别求解啦? (2013-11-22 11:23:34) #include<iostream>

#include<string>

using namespace std;

void Display(const string& str)

{

cout<<"String: "<<str<<endl;

cout<<"Size: "<<str.size()<<endl;

cout<<"Length: "<<str.length()<<endl;

cout<<"Capacity: "<<str.capacity()<<endl;

cout<<"Maxsize: "<<str.max_size()<<endl;

cout<<endl<<endl;

}

int main()

{

string s1;

Display(s1);

s1.resize(23);

Display(s1);

string s2="123456";

Display(s2);

string s3="123 456 asd";

Display(s3);

s3.resize(23);

Display(s3);

return 0;

}