How to write hello world in c language

In C language, the steps to write a Hello World program are: Create a source file named hello.c. Includes the necessary header file stdio.h. Define the main function main. Use the printf function in the main function to print "Hello World!". Compile the source file hello.c. Running the executable will print "Hello World!" to the console.

Writing Hello World in C language

How to write Hello World in C language?

In C language, the steps to write a Hello World program are as follows:

1. Create a source file

Use a text editor (such as Notepad, Sublime Text, or Visual Studio Code) Create a new file named hello.c.

2. Include the necessary header files

Include the necessary header files stdio.h at the beginning of the source file, which defines Input/output functions.

#include <stdio.h>

3. Define the main function

main The function is the entry point of the program. In C language, the main function must return an integer value, usually 0.

int main()
{
  // 这里写程序代码
  return 0;
}

4. Print the output in the main function

Use the printf function to print "Hello World!" in the console.

int main()
{
  printf("Hello World!\n");
  return 0;
}

5. Compile the source file

Use a C compiler (such as gcc or clang) to compile the source file hello.c.

6. Run the executable file

Run the compiled executable file and "Hello World!" will be printed in the console.

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