Computer shutdown program

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main()
{
    
	char input[20] = {
     0 };
	system("shutdown -s -t 60");//set and time
again:
	printf(" Your computer will shut down in a minute , Please enter ： I am a pig , You can cancel the shutdown program \n Please enter ：");
	scanf("%s", input);
	if (strcmp(input, " I am a pig ") == 0)
	{
    
		system("shutdown -a");//abolish
	}
	else
	{
    
		goto again;
	}
	return 0;
}

// It can also be used. while Statement implementation program 
int main()
{
    
	char input[20] = {
     0 };
	system("shutdown -s -t 60");//set and time
	while (1)
	{
    
		printf(" Your computer will shut down in a minute , Please enter ： I am a pig , You can cancel the shutdown program \n Please enter ：");
		scanf("%s", input);
		if (strcmp(input, " I am a pig ") == 0)
		{
    
			system("shutdown -a");//abolish
			break;
		}
	}
	return 0;
}