2609 - 请在屏幕上输出一行字符'hello world!'

no input needed

hello world!

Solution C

#include<stdio.h>
void main()
{
     printf("hello world!\n");
}

Solution C++

#include<cstdio>
using namespace std;
int main()
{
	printf("hello world!\n");
	return 0;
}