C++ Primer day 01

1.标准输入与输出

#include<iostream>
int main(){
    int v1,v2;
    std::cout<<"Enter two numbers:"<<std::endl;
    std::cin>>v1>>v2;
    std::cout<<"The multiply of "<<v1<<" and "<<v2<<" is "<<v1*v2<<std::endl;
}

2.注释

  注释的作用:概述算法、确定变量的用途、解释晦涩难懂的代码段.

  C++两种注释:单行注释和界定符对注释.

  

#include<iostream>
int main(){

    int v1,v2;  //定义变量
    std::cout<<"Enter two numbers:"<<std::endl;  //提示用户输入两个变量数据
    std::cin>>v1>>v2;
    std::cout<<"The multiply of "<<v1<<" and "<<v2<<" is "<<v1*v2<<std::endl;

    /*  
       多行注释
       /* */嵌套注释
     
    */


}