[trivia of two-dimensional array application] | [simple version] [detailed steps + code]

  Sanzi is a kind of black and white chess . Sanzi chess is a traditional folk game , Just walk your three pieces into a line （ cross 、 vertical 、 Diagonals ）, Even if the other party loses . however , There are many times when there is a draw . Let's use it C Language to achieve a simple version of the three chess ！

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Catalog

Preface

One 、test.c

Two 、game.c

3、 ... and 、game.h

The whole idea ：

1. Select start or exit from the menu interface .

​2. Create a chessboard and initialize .

3. Print chessboard .

4. Players play chess （'*' representative player)

5. To decide the outcome ( transport , win , It ends in a draw （‘Q’）)

6. Computer chess （'*' representative computer)

​7. To decide the outcome ( transport , win , It ends in a draw （‘Q’）)

Synchronous step five

8. loop 3-8 step  

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Preface

Usually, the project development needs to be prepared in the form of sub documents , Respectively ：

• test.c As an entry point for code testing
• game.c The function function realization involved in the preparation of sanziqi
• game.h This header file is usually used to complete the function declaration 、 References to header files 、 Macro definition variables .

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First complete the code ：

One 、test.c

#include"game.h"
game()
{
	char ret = 0;
	char board[ROW][COL] = { 0 };
	Initboard(board, ROW, COL);
	Display(board, ROW, COL);
	while (1)
	{
		
		Playermove(board, ROW, COL);
		 ret=Iswin(board, ROW, COL);
		 Display(board, ROW, COL);
		if (ret != 'C')
		{
			break;
		}
		
		Computermove(board, ROW, COL);
		ret = Iswin(board, ROW, COL);
		Display(board, ROW, COL);
		if (ret != 'C')
		{
			break;
		}
		
	}
	if (ret == '#')
	{
		printf(" The computer won \n");
	}
	if (ret == '*')
	{
		printf(" The player won \n");
	}
	if (ret == 'Q')
	{
		printf(" It's a draw \n");
	}

}
menu()
{
	printf("********************************\n");
	printf("*******1. play game*************\n");
	printf("*******0.    exit **************\n");
	printf("********************************\n");
	printf("********************************\n");
}
int main()
{
	int input = 0;
	srand((unsigned int)time(NULL));
	do
	{
		menu();
		printf(" Please select ：");
		scanf("%d", &input);
		
		switch (input)
		{
		case 1:
			game();
			break;
		case 0:
			printf(" Quit the game \n");
			break;
		default:
			printf(" Incorrect input , Re input \n");
		}
	

	}while (input);
	
	return 0;
}

Two 、game.c

#define _CRT_SECURE_NO_WARNINGS 1
#include"game.h"

void Initboard(char board[ROW][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++)
	{
		int j = 0;
		for (j = 0; j < col; j++)
		{
			board[i][j] = ' ';
		}
	}
}
void Display(char board[ROW][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++)
	{
		int j = 0;
		for (j = 0; j < col; j++)
		{
			printf(" %c ", board[i][j]);
			if (j < col - 1)
			{
				printf("|");
			}
		}
		printf("\n");
		if (i < row - 1)
		{
			for (j = 0; j < col; j++)
			{
				printf("---");
				if (j < col - 1)
				{
					printf("|");
				}
			}
			printf("\n");
		}
	}
}
void Playermove(char board[ROW][COL], int row, int col)
{
	printf(" Players go \n");
	int x = 0;
	int y = 0;
	while (1)
	{
		printf(" Please enter your coordinates ");
		scanf("%d%d", &x, &y);
		if (x >= 1 && x <= row&&y >= 1 && y <= col)
		{
			if (board[x-1][y-1] = ' ')
			{
				board[x-1][y-1] = '*';
				break;
			}
			else
			{
				printf(" Occupied , Re input .\n");
			}
		}
		else
		{
			printf(" Coordinate input error , Please re-enter \n");
		}

	}
}
Computermove(char board[ROW][COL], int row, int col)
{
	printf(" Computer go \n");
	while (1)
	{
		int x = rand() % row;
		int y = rand() % col;
		if (board[x][y] == ' ')
		{
			board[x][y] = '#';
			break;
		}
	}
}
int Isfull(char board [ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	for (i = 0; i < row; i++)
	{
		for (j = 0; j < col; j++)
		{
			if (board[i][j] == ' ')
			{
				return 0;
			}
		}
	}
	return 1;
}
char Iswin(char board[ROW][COL], int row, int col)
{
	int i = 0;
	int j = 0;
	for (i = 0; i < row; i++)
	{
		if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][2] != ' ')
		{
			return board[i][0];
			
		}
	}
	for (j= 0; j < col; j++)
	{
		if (board[0][j] == board[1][j] && board[1][j] == board[2][j] && board[2][j] != ' ')
		{
			return board[0][j];
			
		}
	}
	if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[2][2] != ' ')
	{
		return board[0][0];
	}
	if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[2][0] != ' ')
	{
		return board[2][0];
	}
	if (Isfull(board,ROW,COL) == 1)
	{
		return 'Q';
	}
	else
	{
		return 'C';
	}
}

3、 ... and 、game.h

#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#define	ROW 3
#define	COL 3

void Initboard(char board[ROW][COL], int row, int col);
void Display(char board[ROW][COL], int row, int col);
void Playermove(char board[ROW][COL], int row, int col);
Computermove(char board[ROW][COL], int row, int col);
char Iswin(char board[ROW][COL], int row, int col);

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The whole idea ：
 

1. Select start or exit from the menu interface .

And the game program itself should allow users to play repeatedly , So in the main function , We need a loop to complete this function .

do-while When the loop is called, it will first run the loop body , Then make a judgment , So here we choose to use do-while loop .

 

2. Create a chessboard and initialize .

Officially enter the game game（）, First create a chessboard and initialize it .

At the beginning of the program , Let's first create a 3*3 A two-dimensional character array ,

Because of the length and width, we often use , For the convenience of subsequent modification , We are game.h Macro definition method is adopted in ：

The next in game() Function to create an array ： 

And initialize this array , Because this array needs to be output and displayed in front of the user in the future , So we initialize the value to a space “  ”.

Initialization is done with a function ：

3. Print chessboard .

 

 

4. Players play chess （'*' representative player)

1. Players need to fall within the chessboard .

2. Note that the coordinate naming of the array is different from our usual naming of coordinates .x,y All need to be reduced by one .

3. Players should play chess in the place above the chessboard .

5. To decide the outcome ( transport , win , It ends in a draw （‘Q’）)

  Determine the victory of computer players ：
1 Determine all rows
2 Determine all columns
3 Determine two diagonals

  Connected to the above figure ：

Because the chessboard may be full , But no one wins ,
So we need to judge the draw ,

Here we write a is_full() function , Used to judge whether the chessboard is full ：
1 call isFull function .
2 If any element in the array is ’ ‘, So not full , return 0. If not for ’ ', Full of , return 1.
3 If The chessboard is full There is no winner or loser , draw .

The meaning of the returned result ：
1  ‘*’ Indicates that the player wins
2  ‘#’ It means that the computer wins
3  ’C ’ It means there is no point in winning or losing
4  ‘Q’ It means draw

 

6. Computer chess （'*' representative computer)

1.rand() Is used to generate random numbers , Here we also need to be in the main function main Add a line of code .

Take time as the seed of random number , Make sure that the row and column coordinates are really random .

2. Generating random numbers requires reference time.h This header file .

 

7. To decide the outcome ( transport , win , It ends in a draw （‘Q’）)

Synchronous step five

8. loop 3-8 step