C language tutorial

C Language is a universal 、 Process oriented computer programming language .1972 year , For transplantation and development UNIX operating system , Dennis · Ritchie designed and developed... At Bell Telephone lab C Language .

C Language is a widely used computer language , It is associated with Java Programming languages are just as popular , Both are widely used among modern software programmers .

Current and current C The language standard is C18 , Before it C Language standards include C17、C11...C99 etc. .

#include <stdio.h>
 
int main()
{
    /*  My first one  C  Program  */
    printf("Hello, World! \n");
 
    return 0;
}

• be-all C Language programs need to include  main()  function . Code from  main()  The function starts executing .
• /* ... */  Used to comment on .
• printf()  Used to format output to screen .printf()  Function in  "stdio.h"  The header file states .
• stdio.h  It's a header file ( Standard I/o header file ) , #include  It's a preprocessing command , Used to import header files . When the compiler encounters  printf()  Function time , If not found  stdio.h  The header file , A compilation error occurs .
• return 0;  Statement is used to exit the program .