main.cpp

来自「《C++ STL开发技术引导》配套光盘 聆听大师级的指点」· C++ 代码 · 共 16 行

#include <string>
#include <iostream>

int main(void){
	using namespace std;
	string s;
	cout << s.empty() << endl;  //空字符串,返回1
	s+="1234567";
	cout << s.empty() << endl;  //不为空,返回0
	cout << s.size() << endl;   //7个字符,返回7
	cout << s.length() << endl; //返回7
	//
	const char* cArray=s.c_str();
	cout << cArray[2] << endl;  //返回字符3
	return 0;
}