c++ 中的string类

string的实例化：

string的常用操作：

#include <iostream>
#include <string>
using namespace std;
int main()
{
	string name;
	cout << "Input your name:" << endl;
	getline(cin, name);

	if(name.empty()){
		cout << "Your name is null" << endl;
	}else{
		cout << "Your name is " << name << endl;
	}

	//size和length总是相同的
	cout << "size:" << name.size() << endl;
	cout << "length:" << name.length()<< endl;
	cout << "Its first alpha is " << name[0] << endl;

	cout << name.append("hqq") << endl;
	cout << "iterator:" << endl;
	for(string::iterator it = name.begin(); it < name.end(); ++it){
		cout << *it << endl;
	}
	cout << "substr(0,5):" << endl;
	cout << name.substr(0,5) << endl;
	string name1 = "bixiaofenghqq";
	// 0 相同， -1 不同
	cout << "name compare with name1 : " << endl;
	cout << name.compare(name1) << endl;
	name.clear();
	cout << "clear name :" << endl;
	cout << name << endl;


	system("pause");
	return 0;
}