C language: sanziqi

List of articles

• Preface
• Code part
• summary part

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Preface

As for C A deep understanding of language , In my spare time , Just write a program to enrich yourself , Although it can not include all the knowledge points learned , But there will be other procedures later .

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Code

The following is the main body of this article , The following cases can be used for reference

This procedure is conducted in VS Implemented in environment , It is divided into three files （ A header file game.h And two source files test.c&game.c）, The following is the main introduction test.c The contents of the document （ That is, the overall framework ） and game.c Implementation method in the file .

game.c（ The code explanation is in the comments below ）:

#define _CRT_SECURE_NO_WARNINGS 1

#include "game.h"

void Initboard(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++)
		{
			board[i][j] = ' ';
		}
	}
}
// Initialize chessboard , For example, a three row and three column matrix will be assigned an empty string .


void Displayboard(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++)
		{
			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");
	}
}
// Print out the chessboard （ visualization ）, Here we need to make a partition map 


void player_move(char board[ROW][COL], int row, int col)
{
	printf(" Players play chess :");
	int x = 0;
	int y = 0;
	while (1)
	{
		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(" The location is already occupied , Please re-enter :");
			}
		}
		else
		{
			printf(" It's illegal to enter coordinates , Please re-enter :");
		}
	}
}
// Judge whether players play chess regularly , Specification will break skip , If it is not standardized, it will pass while Cycle control re-enter 


void computer_move(char board[ROW][COL], int row, int col)
{
	printf(" The computer plays chess :\n");
	int x = 1;
	int y = 1;
	while (1)
	{
		x = rand() % row;
		y = rand() % col;
		if (board[x][y] == ' ')
		{
			board[x][y] = '#';
			break;
		}
	}
}
// Computer chess is done by generating random coordinates , At the same time, you should also judge that the chess position is an empty string to play chess 


int is_full(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;
}
// Judge whether the chessboard is full , Yes, go back to 1, If not, return to 0


char is_win(char board[ROW][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++)
	{
		if (board[i][0] == board[i][1] && board[i][1] == board[i][2] && board[i][1] != ' ')
		{
			return board[i][1];
		}
	}
	for (i = 0; i < col; i++)
	{
		if (board[0][i] == board[1][i] && board[1][i] == board[2][i] && board[1][i] != ' ')
		{
			return board[1][i];
		}
	}
	if (board[0][0] == board[1][1] && board[1][1] == board[2][2] && board[1][1] != ' ')
	{
		return board[1][1];
	}
	if (board[0][2] == board[1][1] && board[1][1] == board[2][0] && board[1][1] != ' ')
	{
		return board[1][1];
	}
	if (is_full(board, row, col) == 1)
	{
		return 'Q';
	}
	return 'C';
}
//is_win This function is also a flexible function in the whole project （ This function is not optimal , It can only be used in Sanzi chess , It can be modified according to the actual situation ）. This function judges the horizontal 、 longitudinal 、 Whether there are three pieces connected into a line , If yes, it will return the string of the completed chess piece input ; If the board is full and no one wins , Then return to Q; If not, return C.

test.c：

#define _CRT_SECURE_NO_WARNINGS 1

#include "game.h"

void menu()
{
	printf("***************************\n");
	printf("*******   1. play   *******\n");
	printf("*******   0. exit   *******\n");
	printf("***************************\n");
}

void game()
{
	char board[ROW][COL] = { 0 };
	Initboard(board, ROW, COL);// Initialize chessboard 
	Displayboard(board, ROW, COL);// Print chessboard 
	char ret = 0;
	while (1)
	{
		player_move(board, ROW, COL);// Players play chess 
		Displayboard(board, ROW, COL);// Print chessboard 
		ret = is_win(board, ROW, COL);// Judgement of winning or losing 
		if (ret != 'C')
		{
			break;
		}
		computer_move(board, ROW, COL);// The computer plays chess 
		Displayboard(board, ROW, COL);// Print chessboard 
		ret = is_win(board, ROW, COL);// Judgement of winning or losing 
		if (ret != 'C')
		{
			break;
		}
	}
	if (ret == '*')
	{
		printf(" Game player wins \n");
	}
	else if (ret == '#')
	{
		printf(" Computers win \n");
	}
	else
	{
		printf(" It ends in a draw \n");
	}
}

void test()
{
	srand((unsigned int)time(NULL));
	int input = 0;
	do
	{
		menu();
		printf(" Please enter :");
		scanf("%d", &input);
		switch (input)
		{
		case 1:
			game();
			break;
		case 0:
			printf(" Quit the game \n");
			break;
		default:
			printf(" Wrong choice \n");
			break;
		}
	} while (input);
}

int main()
{
	test();
	return 0;
}

stay game Function , First initialize and print the chessboard , Then use while Loop to repeat every time the player and the computer play chess 、 Print and determine if the chessboard has been filled , If no one wins or the board is filled ,is_win The function returns C,while It's going to go on and on . When one side wins or the board is filled , The corresponding string will be returned , Further judgment is made by the returned string .

It is worth noting that , Because computer chess uses random coordinates , Random values need to be called , So you need to write in at the beginning srand((unsigned int)time(NULL)) This code , At the same time, you need to import header files <time.h> and <stdlib.h>.

game.h:

#pragma once

#include <stdio.h>
#include <time.h>
#include <stdlib.h>

#define ROW 3

#define COL 3

// Initialize chessboard 
void Initboard(char board[ROW][COL], int row, int col);

// Print chessboard 
void Displayboard(char board[ROW][COL], int row, int col);

// Players play chess 
void player_move(char board[ROW][COL], int row, int col);

// The computer plays chess 
void computer_move(char board[ROW][COL], int row, int col);

char is_win(char board[ROW][COL], int row, int col);

The complete code of the whole Sanzi chess is put here , You can have a look if you are interested ： Cai Xinzhi /C - C++ project - Gitee.comhttps://gitee.com/zkcxz/c-----c---project/tree/master/game1 Extension ： You can modify the number of rows and columns as required 、 Rules and so on . 

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summary

That's what we're going to talk about today , This program only uses a large number of function call arrays , Not much else , Other knowledge points will be summarized later . Next , Make a brief summary of what you have learned recently ： In the past few months , To study the C The basic grammar of language 、 Data storage 、 Pointer related knowledge points 、 String and character functions 、 Custom type 、 Dynamic memory management , The most difficult part is the pointer , There will be an address book program to consolidate , In the future, I plan to sort out the remaining blogs , Learn the next C Language file operation 、 Program environment and pretreatment , Recently, I still read a book I bought before 《C Modern methods of language programming （ The second edition ）》, Try to consolidate C Basics , For later learning Java To prepare for .