How to write helloworld code in c language

In C language, the steps to write the "Hello, world!" program include: creating the source file "hello.c". Includes the header file <stdio.h>. Define the main function main(). Use printf() to print "Hello, world!". Returning 0 indicates that the program executed successfully.

Write "Hello, world!" in C language

Write "Hello, world in C language !" The steps of the program are as follows:

1. Create the source file

Use a text editor to create a text file named "hello.c".

2. Include the header file

At the beginning of the source file, include the header file <stdio.h> of the standard input/output library.

<code class="c">#include <stdio.h></code>

3. Define the main function

The entry point of the C program is the main function, which is responsible for executing the program logic.

<code class="c">int main() {</code>

4. Output "Hello, world!"

Use the printf function to output "Hello, world!" to the console.

<code class="c">    printf("Hello, world!\n");</code>

5. Return 0

main The function needs to return an integer value, 0 means the program is successfully executed.

<code class="c">    return 0;
}</code>

Full code:

<code class="c">#include <stdio.h>

int main() {
    printf("Hello, world!\n");
    return 0;
}</code>

Compile and run the program

Use a C compiler (such as GCC or Clang) Compile the "hello.c" file. Then, run the executable file (such as "./hello"). The console will print "Hello, world!".

The above is the detailed content of How to write helloworld code in c language. For more information, please follow other related articles on the PHP Chinese website!