C Language Learning 002: The first complete C program code

#include <stdio.h>//referencing the relevant external library, stdio.h contains the code for the terminal to read and write data//Program entrance, the program through the return value of the main function to determine whether the program is successful, 0 for success, not 0 to indicate that the program is running in addition to the problem//The return value of Main in the earlier ANSI C standard can be a void type, but the C99 must be an intintMain () {intdecks; Puts ("The input has several decks of cards");//print data at the terminalscanf"%i", &decks);//%i receives an integer    if(decks<1) {puts ("Invalid number of pairs"); return 1; } printf ("there are%i cards \ n", (decks* the));//print data at the terminal    return 0;}

C Language Learning 002: The first complete C program code