How To Write C Program In Windows 10

How to write the first C++ programme?

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So you've decided to acquire how to program in C++ but don't know where to start. Hither's a brief overview of how you tin can get started.

Become a C++ Compiler

This is the first step you'd want to exercise before starting learning to programme in C++. In that location are adept free C++ compilers bachelor for all major OS platforms. Download one that suits your platform or yous can use the tutorialspoint.com's online compiler on https://www.tutorialspoint.com/compile_cpp_online.php

• GCC − GCC is the GNU Compiler chain that is basically a collection of a bunch of unlike compilers created by GNU. You lot can download and install this compiler from http://gcc.gnu.org/
• Clang−Clang is a compiler collection released by the LLVM customs. It is available on all platforms and y'all can download and observe install instructions on http://clang.llvm.org/get_started.html
• Visual C++ 2017 Community− This is a gratis C++ compiler built for windows past Microsoft. You can download and install this compiler from https://world wide web.visualstudio.com/vs/cplusplus/

Write a C++ program

Now that you lot have a compiler installed, its time to write a C++ program. Let's start with the epitome of programming case'south, information technology, the Hello earth program. We'll print howdy world to the screen using C++ in this instance. Create a new file called hi.cpp and write the following lawmaking to it −

#include<iostream> int principal() {    std::cout << "Hello Earth\n"; }

Allow'south dissect this program.

Line i− We showtime with the #include<iostream> line which substantially tells the compiler to copy the code from the iostream file(used for managing input and output streams) and paste it in our source file.  Header iostream, that allows performing standard input and output operations, such as writing the output of this program (Hello Earth) to the screen. Lines kickoff with a hash sign (#) are directives read and interpreted by what is known as the preprocessor.

Line 2− A blank line: Blank lines have no effect on a programme.

Line iii− We then declare a function called master with the render blazon of int. main() is the entry point of our program. Whenever we run a C++ program, we offset with the main function and brainstorm execution from the first line within this office and continue executing each line till we reach the stop. Nosotros start a block using the curly brace({) here. This marks the showtime of main's function definition, and the closing brace (}) at line v, marks its stop. All statements between these braces are the function'south body that defines what happens when main is chosen.

Line 4−

std::cout << "Hello World\n";

This line is a C++ statement. This statement has three parts: First, std::cout, which identifies the standard console output device. 2d the insertion operator << which indicates that what follows is inserted into std::cout. Final, we accept a sentence within quotes that we'd like printed on the screen. This will become more than clear to you every bit we proceed in learning C++.

In short, we provide a cout object with a cord "Hello world\n" to be printed to the standard output device.

Notation that the statement ends with a semicolon (;). This grapheme marks the cease of the statement

Compile the Program

Now that we've written the plan, we need to translate information technology to a language that the processor understands, ie, in binary motorcar code. Nosotros do this using a compiler we installed in the first stride. You lot need to open your last/cmd and navigate to the location of the hello.cpp file using the cd command. Assuming you installed the GCC, you can employ the following command to compile the program −

$ thousand++ -o how-do-you-do howdy.cpp

This command means that you want the g++ compiler to create an output file, hullo using the source file hello.cpp.

Run the program

Now that we've written our programme and compiled it, fourth dimension to run it! You lot tin run the program using −

$ ./hello

Output

You volition get the output−

Hullo world

Published on 15-February-2018 07:48:23

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Source: https://www.tutorialspoint.com/How-to-write-the-first-Cplusplus-program

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