C++ string类型与其他类型的转换

string转char

使用方法string.c_str()
注意只能转换为常字符指针

	string s;
	const char* c;
	s = "153";
	c = s.c_str();

string转int

使用函数stoi(string)

	string s;
	int i;
	s = "153";
	i = stoi(s);

string 转double、long、float

stol(string), stof(string), stod(string)

实例

#include <iostream>
#include <string>
using namespace std;
int main()
{
	string s;
	const char* c;
	int i;
	double d;
	s = "153";
	c = s.c_str();
	i = stoi(s);
	d = i;
	cout<<s<<endl<<c<<endl<<i<<endl<<d<<endl;
	s = c;
	cout<<s<<endl;
	return 0;
}