Shutdown or Turn Off Computer

/*
Write a program in c for Shutting down or Turn off computer
*/

Windows XP 
#include<stdio.h>
#include<stdlib.h>

main()
{
char ch;

printf("Do you want to shutdown your computer now (y/n) ");
scanf("%c",&ch);

if( ch == 'y' || ch == 'Y' )
system("C:\\WINDOWS\\System32\\shutdown -s");

return 0;
}

Windows 7 
#include<stdio.h>
#include<stdlib.h>

main()
{
char ch;

printf("Do you want to shutdown your computer now (y/n)\n");
scanf("%c",&ch);

if( ch == 'y' || ch == 'Y' )
system("C:\\WINDOWS\\System32\\shutdown /s");

return 0;
}