POiSON WORLD

If you are using Turbo C Compiler then execute your file from folder. Press F9 to build your executable file from source program. When you run from within the compiler by pressing Ctrl+F9 it may not work.

C programming code for Windows XP

#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;
}




C programming code for 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;
}


To shutdown immediately use “C:\WINDOWS\System32\ shutdown /s /t 0”. To restart use /r instead of /s.
C programming code for Ubuntu Linux
#include <stdio.h>

int main() {
  system("shutdown -P now");
  return 0;
}



You need to be logged in as root user for above program to execute otherwise you will get the message shutdown: Need to be root, now specifies that you want to shutdown immediately. ‘-P’ option specifes  you want to power off your machine. You can specify minutes as:
shutdown -P “number of minutes”
For more help or options type at terminal: man shutdown.