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.
<code class="c">#include <stdio.h></code>
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.
<code class="c">int main() { // 这里写程序代码 return 0; }</code>
4. Print the output in the main function
Use the printf
function to print "Hello World!" in the console.
<code class="c">int main() { printf("Hello World!\n"); return 0; }</code>
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!