match game
21 sticks game. There are currently 21 matches, and two people take turns to take them. Each person can take 1 to 4 matches at a time. It is not allowed to take more (if you take more or the number taken is not within the legal range, you will be required to re-enter), and you must not take it. , whoever takes the last match loses. Please write a program for human-computer games, requiring the human to take first, and the computer to take later; please design a rule for the computer to take away the match, so that the computer is always victorious.
For example 1, the example of the player's running results is as follows:
Game begin:
How many sticks do you wish to take (1~4)?6↙
How many sticks do you wish to take (1~4)?3↙
18 sticks left in the pile.
Computer take 2 sticks.
16 sticks left in the pile.
How many sticks do you wish to take (1~4)?3↙
13 sticks left in the pile.
Computer take 2 sticks.
11 sticks left in the pile.
How many sticks do you wish to take (1~4)?3↙
8 sticks left in the pile.
Computer take 2 sticks.
6 sticks left in the pile.
How many sticks do you wish to take (1~4)?3↙
3 sticks left in the pile.
Computer take 2 sticks.
1 sticks left in the pile.
How many sticks do you wish to take (1~1)?2↙
How many sticks do you wish to take (1~1)?1↙
You have taken the last sticks.
***You lose!
Game Over.My code is as follows:
#include<stdio.h>
int main(void)
{
int a = 21, i;
printf("Game begin:\n");
while (a > 0)
{
do{
printf("How many sticks do you wish to take (1~%d)?",a > 4 ? 4 : a);
scanf("%d", &i);
}while (i>4 || i<1 || i>a);
/*************** Begin ***************/
if(a==1)
{printf("You have taken the last sticks.\n***You lose!\nGame Over.\n");
break;}
a=a-i;
printf("%d sticks left in the pile.\n",a);
printf("Computer take 2 sticks.\n");
a=a-2;
printf("%d sticks left in the pile.\n",a);
}
return 0;
}