#include <iostream>
#include <string>
int main()
{
{
const std::string s = "a string";
std::cout << s << std::endl;
{
const std::string s = "another string";
//std::cout << s << std::endl;}}
std::cout << s << std::endl;
}; //这里加分号`;`其实和`}`无关系,`;`相当于一条空语句
}
}