C language to write a simple timing shutdown program _c language

Write a timer shutdown program, you can immediately shut down the computer, you can also turn off the computer after a period of time.

The system () command is mainly examined here.

Code implementation:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main ()
{
  Char cmd[20]= "shutdown-s-T";
  Char t[5]= "0";
  int C;
  System ("Title C language Shutdown procedure"); Set CMD window title
  system ("mode con cols=48 lines=25");//Window width height 
  system ("Color F0");//Can be written as red. Color Group
  System (" Date/t ");
  System ("time/t");
  printf ("-----------C language shutdown program-----------\ n");
  printf ("1. Implement a timed shutdown of the computer within 10 minutes \ n");
  printf ("2. Turn off the computer immediately \ n");
  printf ("3. Log off of the computer \ n");
  printf ("0. Exit system \ n");
  printf ("-------------------------------------\ n");
  scanf ("%d", &c);
  Switch (c) {case
    1:
      printf ("How many seconds do you want to turn off the computer automatically?") (0~600) \ n ");
      scanf ("%s", t);
      System (strcat (Cmd,t));
      break;
    Case 2:
      system ("Shutdown-p");
      break;
    Case 3:
      system ("Shutdown-l");
      break;
    Case 0: Break
      ;
    Default:
      printf ("error!\n");
  }
  System ("pause");
  return 0;
}

This program is not very useful, but it allows us to understand the system () function.

Under Windows, the System () function can execute a DOS command; in Unix/linux, you can execute the shell.

Please run the above program under Windows. The DOS interface settings and shutdown functions are implemented through DOS commands in the program.