One code per day - day one

Hello everyone , The newcomers here, Yang a sang, share daily ;

Since it's the first time , Then write the simplest code （ Absolutely not. I don't know much ！）,

The code is as follows ：

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include"math.h"
#include<string.h>
int main(){
    printf("hello world !");
    return 0;
}

This is a simple output statement ;

Output one “hello world ！”, What about? , Did you recall , The first code in my life .

This is the new man Yang sang , I will share with you every day , Please don't laugh at me （ The dog's head lives ）