Compile and run C++ program under linux system

premise

First of all, there must be a C++ compilation environment under the linux system. can use

which gcc
which g++

Check whether the GNU compiler is installed in the linux system.

Write code

Use vimthe command to open the editor to write code,

first write the simplest output program

#include<iostream>
using namespace std;
int main()
{
    
    
        cout<<"hello world!"<<endl;
        return 0;
}

EscPress to exit edit mode when done , enter to ：wqsave and exit. You can see that the hello.cppc file exists in the directory.

generate executable

Excuting an order

g++ -o hello hello.cpp

That is, hello.cpp is compiled into the hello executable file.

execute program

。/hello