## C Programming

### Match Stick game

#### Objective

Write a program for a match-stick game between the user and the computer. Your program should ensure that the computer always wins. Rules for the game are as follows:

• There are 21 match-sticks
• The computer asks the player to pick 1,2,3, or 4 match-sticks.
• After the person picks, the computer does its picks.
• Whoever is forced to pick up the last matchstick loses the game.

#### Program / Solution

```#include<stdio.h>
int main() {
int m = 21;
int picks,cpicks;

while(1) {
printf("\nMatch sticks left %d\n--------------------------------------------\n",m);

printf("\nPick the match sticks 1,2,3, or 4: ");
scanf("%d",&picks);

if(picks < 1 || picks > 4) {
printf("Invalid Picks\n\n");
continue;
}

m = m - picks;
printf("Your picks = %d\n",picks);

cpicks = 5 - picks;
printf("Computer picks  = %d\n",cpicks);

m = m - cpicks;

if(m == 1) {
printf("\n\nNumber of matchsticks left %d",m);
printf("\nYou lost the game!!");
break;
}
}
return 0;
}
```

#### Sample Output

```Match sticks left 21
--------------------------------------------

Pick the match sticks 1,2,3, or 4: 5
Invalid Picks

Match sticks left 21
--------------------------------------------

Pick the match sticks 1,2,3, or 4: 2
Your picks = 2
Computer picks  = 3

Match sticks left 16
--------------------------------------------

Pick the match sticks 1,2,3, or 4: 1
Your picks = 1
Computer picks  = 4

Match sticks left 11
--------------------------------------------

Pick the match sticks 1,2,3, or 4: 2
Your picks = 2
Computer picks  = 3

Match sticks left 6
--------------------------------------------

Pick the match sticks 1,2,3, or 4: 3
Your picks = 3
Computer picks  = 2

Number of matchsticks left 1
You lost the game!!
```