Small program of C language practice (consolidate and deepen the understanding of knowledge points)

Catalog

Preface  

Introduction to small projects

Main part

  The implementation part of the function

Header file and the name part of the function

Expand as needed

  Operation result display

The expanded results are displayed

  Conclusion  

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Preface  

         Hello everyone , What I bring you today is a C A small program of language practice , Many little friends are finishing their studies C After some knowledge of language , I don't know how to verify myself Do you really understand this knowledge point , Whether you can use this knowledge to do some operations you want to complete . At this time, we should do some small projects to feel Take control of yourself , Now let's introduce the small projects that we brought to you today .

Introduction to small projects

         This small project uses C/C++ Realize a small game that we should all have played --- Sanzi （ It can be extended to N Sub chess enables players to play chess with computers ), This small project is divided into three parts , The first part is the main implementation part of the code , The second part is the specific function part of the code , The third part is about the names of functions and header files . Which applies to the cycle , Functions and some logical aspects operation , It can help us consolidate and practice this knowledge point , Improve our logical thinking , Let's take a look at the specific implementation of this small project ：

Main part

#include"game.h"

int main()
{
	// Initialize random values 
	srand((unsigned int)time(NULL));
	int input = 0;
	do
	{
		menu();
		cout << " Please select a number :\n";
		cin >> input;
		switch (input)
		{
		case 1:
			// Functions implemented by Sanzi chess 
			game();
			break;
		case 0:
			cout << " Quit successfully \n";
			break;
		default:
			cout << " This option does not exist , Please re-enter \n";
			break;
		}
	} while (input);
	return 0;
}

  The implementation part of the function

#include"game.h"
// Implementation of menu function 
void menu()
{
	cout << "*****************************\n";
	cout << "*******1.play  0.exit********\n";
	cout << "*****************************\n";
}

void InitBoard(char board[][COL], int row, int col)
{
	int i = 0;
	for (i = 0; i < row; i++)
	{
		int j = 0;
		for (j = 0; j < col; j++)
		{
			// Assign each element in the chessboard as a space first 
			// To initialize 
			board[i][j] = ' ';
		}
	}
}

void displayBoard(char board[][COL], int row, int col)
{
	int i = 0, j = 0;
	for (i = 0; i < row; i++)
	{
		// Print row 
		for (j = 0; j < col; j++)
		{
			// Print Columns 
			cout <<" "<<board[i][j]<<" ";
			// Restricted printing conditions 
			if (j < col - 1)
			{
				cout << "|";
			}
		}
		cout << "\n";
		// Print split lines 
		// If the number of rows is less than the total row minus one 
		if (i < row - 1)
		{
			for (j = 0; j < col; j++)
			{
				cout << "---";
				// Restricted printing conditions 
				if (j < col - 1)
				{
					cout << "|";
				}
			}
		}
		cout << "\n";
	}
}

void PlayerMove(char board[][COL], int row, int col)
{
	int x = 0, y = 0;
	cout << " Players play chess \n";
	while (1)
	{
		cout << " Please enter the coordinates \n";
		cin >> x >> y;
		if (x >= 1 && x <= row && y >= 1 && y <= col)
		{

			if (board[x - 1][y - 1] == ' ')
			{
				board[x - 1][y - 1] = '*';
				break;
			}
			else
			{
				cout << " The coordinates are occupied , Please play chess again \n";
			}
		}
		else
		{
			cout << " Incorrect input , Please re-enter \n";
		}
	}
}

void ComeputerMove(char board[][COL], int row, int col)
{
	cout << " The computer plays chess \n";
	int x = 0, y = 0;
	x = rand() % row;// Range 0—2
	y = rand() % col;// Range 0—2
	while (1)
	{
		if (board[x][y] == ' ')
		{
			board[x][y] = '#';
			break;
		}
		else
		{
			x = rand() % row;// Range 0—2
			y = rand() % col;// Range 0—2
		}
	}
}

char IsWin(char board[][COL], int row, int col)
{
	// That's ok 
	int i = 0, j = 0, count = 1, x = 0;
	char a = 0;
	for (i = 0; i < row; i++)
	{
		x = 0, count = 1;
		for (j = 0; j < col; j++)
		{
			if (board[i][x] == board[i][x + 1] && x < col&&board[i][x]!=' ')
			{
				a = board[i][x];
				count++;
				x++;
			}
			if (count == col)
			{
				return a;
			}
		}
	}
	
	// Column 
	i = 0, j = 0, count = 1, x = 0;
	for (i = 0; i < col; i++)
	{
		count = 1, x = 0;
		for (j = 0; j < row; j++)
		{
			if (board[x][i] == board[x + 1][i] && x < row&&board[x][i] != ' ')
			{
				a = board[x][i];
				count++;
				x++;
			}
			if (count == row)
			{
				return a;
			}
		}
	}
	
	// Diagonals 
	i = 0, j = 0, count = 0, x = 0;
	for (i = 0; i < row; i++)
	{
		for (j = 0; j < col; j++)
		{
			x = board[0][0];
			if (i == j && board[i][j] == x && x != ' ')
			{
				a = board[i][j];
				count++;
			}
			
		}
	}
	if (count == row)
	{
		return a;
	}

	i = 0, j = 0, count = 1;
	char y = 0, z = 0;
	for (i = 0; i < row; i++)
	{
		for (j = 0; j < col; j++)
		{
			y = board[0][row-1];
			if (i == j && board[i][j] == y && y != ' '&& board[row - 1][0] == board[i][j] && board[row-1][0]==y)
			{
				z = board[i][j];
				count++;
			}
		}
	}
	if (board[row - 1][0] == board[0][row - 1])
	{
		count++;
	}
	if (count == row)
	{
		return z;
	}
	// If you come here, the previous situation is not consistent, that is, no one wins 
	// At this point, judge the draw or continue 
	i = 0, j = 0, count = 0, x = 0;
	for (i = 0; i < row; i++)
	{
		for (j = 0; j < col; j++)
		{
			if (board[i][j] == ' ')
			{
				return 0;// under 
			}
		}
	}
	return 1;// Is full 
}


void game()
{
	// Initialize the elements in the two-dimensional array to 0
	char board[ROW][COL] = { 0 };
	char ret = 0;
	// Initialize chessboard 
	InitBoard(board, ROW, COL);
	// Print chessboard 
	displayBoard(board, ROW, COL);
	// Playing chess 
	while (1)
	{
		// Players play chess  
		PlayerMove(board, ROW, COL);
		displayBoard(board, ROW, COL);
		// Every time a player finishes playing chess, he must decide whether to win or lose 
		ret = IsWin(board, ROW, COL);
		if (ret != 0)
		{
			break;
		}
		// The computer plays chess 
		ComeputerMove(board, ROW, COL);
		displayBoard(board, ROW, COL);
		// Every time the computer plays chess, it has to judge whether it wins or loses 
		ret = IsWin(board, ROW, COL);
		if (ret != 0)
		{
			break;
		}
	}
	if (ret == '*')
	{
		cout << " Congratulations , You win ！\n";
	}
	else if (ret == '#')
	{
		cout << " unfortunately , You lost to the computer \n";
	}
	else
	{
		cout << " It ends in a draw ！\n";
	}
}

Header file and the name part of the function

#pragma once
#include<iostream>
#include<stdlib.h>
#include<stdio.h>
#include<time.h>
#define ROW 3
#define COL 3
using namespace std;
// The name of the menu 
void menu();

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

// Display chessboard 
void displayBoard(char board[][COL], int row, int col);

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

// The computer plays chess 
// Find a random player who doesn't play chess 
void ComeputerMove(char board[][COL], int row, int col);

// Judgement of winning or losing 
char IsWin(char board[][COL], int row, int col);

// Game interface 
void game();

Expand as needed

#define ROW 3
#define COL 3
// You just need to define the ROW（ That's ok ） as well as COL（ Number of columns ） Just modify it 

  Operation result display

 

 

The expanded results are displayed

#define ROW 5
#define COL 5
// Extended to 5 Ziqi 

 

 

 

 

 

 

  Conclusion  

         This is the end of the small project , You can run the code yourself and try it , If there is anything you don't understand , You can leave a message in the comment area or send me a private message directly , Thank you for your support ！