how to compile and run c/c++ program on ubuntu

Write and save the program

C/C++ in Ubuntu

Open a simple text editor (e.g gedit), IDE ( Eclipse) or command line code editor (Nano or Vim). I’ll be using gedit as it is very simple to use and it’s recommended for beginner programmers. Right Click on Desktop or any directory (Browse File using Nautilus) and select create new File - hello.c/hello.cpp (.c extension is used to indicate that it’s C program and .cpp means C++). Then write a simple program like this (and save the program press Ctrl+C).

// C++ program

#include <iostream>

int main()
{
	std::cout << "Hello! This is my first C++ program with Ubuntu!" <<endl;

	// Do something more if you want

	return 0;
}

// C program

#include <stdio.h>

int main()
{
	printf("Hello! This is my first C program with Ubuntu n");

	// Do something more if you want

	return 0;
}

Compile the program

GCC(GNU Compiler Collection) is installed by default in Ubuntu. To compile the program, open the terminal and move on to the target directory type the command - (where gcc implies complier name, then it asks for the file name of source program while -o option specifies the file name of the output program).

$ gcc hello.c -o hello1

if there is no syntax/semantic error in your program then the compiler will sucessfully generate an execute file, otherwise fix the program in your code.

Execute the program

To execute the program, you need to run

./hello1

running a C program in Ubuntu.

Compiling and Executing C++ program

The steps are almost same as abve but you need to install g++ compiler, the file extenstion should be .cpp and in compilation phase replace gcc with g++. To install G++ compiler, execute the command:

$ sudo apt-get install g++