1.1 boost库学习--类型转换（字符串to数值类型）

#include <boost/lexical_cast.hpp>

using boost::lexical_cast;

#include <iostream>

using namespace std;

int main()

{

//string to int

int a = lexical_cast<int>("123");

//string to double

double d = lexical_cast<double>("123.123");

//string to long

long l = lexical_cast<long>("123456");

cout<<a<<endl;

cout<<d<<endl;

cout<<l<<endl;

return 0;

}