2021-08-14 Sanzi chess

Catalog

#1 Code

#2 Several repaired bug

#3 Accumulated experience

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#1 Code

The main function main.cpp

#include <stdio.h>
#include "supportGaming.h"
int main() {
	/*chessBoard oneBoard;
	piece onePiece;			onePiece.player = 1; onePiece.x = 1; onePiece.y = 1;
	play(&oneBoard, &onePiece);
	printBoard(&oneBoard);
	printf("%d\n",isDetermined(&oneBoard));*/
	printf(" The end result is ：%d\n",game());
	return 0;
}

The header file supporGaming.h

// The board 
struct chessBoard {
	int num = 0;// The number of pieces on the chessboard 
	int arr[3][3] = { 0 };// The board ,0 It means no children ,1 It stands for the chess pieces that are played first ,2 Represents the chess pieces of the back hand 
};
// Once 
struct piece {
	int player = 0;// The chess pieces of the first player are 1, The backhand player's chess pieces are 2
	int x = 0;// The second of the chessboard x That's ok 
	int y = 0;// The second of the chessboard y Column 
	// Note that for chess players ,x and y The range of is [1,3], All subscripts converted to arrays should be subtracted 1
};

int isDetermined(chessBoard* oneBoard);// Read into a chessboard , Return results .
void play(chessBoard* board, piece* onePiece);// A chess player makes a specified modification to the specified chessboard .
void printBoard(chessBoard* board);// Print chessboard 
int game();
int examine(chessBoard* board, piece* onePiece); Check whether each drop is legal ： Don't fall where you've already fallen 

Source file supportGaming.cpp

#include <stdio.h>
#include "supportGaming.h"

// The board 


// Play a chess game , Return the chess result . First hand wins , return 1; The backhand wins , return 2; Ruo Heqi , Then return to 0.
int game() {
	// Generate chessboard and pieces 
	int result = 0;
	chessBoard qipan;
	piece player1;
	piece player2;
	player1.player = 1;
	player2.player = 2;
	// When there is no winner (isDetermined The return value is 0) Continue a round && The chessboard is not full 
	printBoard(&qipan);
	while (!(result = isDetermined(&qipan))) {
		// There is no winner and the chessboard is full , Directly return to the draw . You can't go to the next round 
		if (qipan.num == 9) {
			result = 0;
			break;
		}
		do {
			printf(" Please play chess with number one player \n");
			scanf("%d %d", &player1.x, &player1.y);
		} while (examine(&qipan, &player1) == 0);
		play(&qipan, &player1);
		printBoard(&qipan);
		if (qipan.num == 9) {
			result = 0;
			break;
		}
		if ((result = isDetermined(&qipan)) != 0) {
			break;
		}
			
		do {
			printf(" Please play chess with No. 2 player \n");
			scanf("%d %d", &player2.x, &player2.y);
		} while (examine(&qipan, &player2) == 0);
		play(&qipan, &player2);
		printBoard(&qipan);
		if ((result = isDetermined(&qipan)) != 0) {
			break;
		}
	}
	result = isDetermined(&qipan);

	return result;
}

// Judge the result of a chessboard , First hand wins , return 1; The backhand wins , return 2; Ruo Heqi , Then return to 0.
int isDetermined(chessBoard* oneBoard) {
	//arr For the chessboard , A two-dimensional array （ The first address ）
	int* row1 = (int*)(oneBoard->arr);// The first address on the first line 
	int* row2 = row1 + 3;// The first address on the second line 
	int* row3 = row2 + 3;// The first address on the third line 

	// These conditions cannot happen at the same time , So it doesn't matter if there is a sequence of judgment .
	// The first line and are 3/6 Time will tell the difference 
	if (*row1 * *(row1 + 1) * *(row1 + 2) == 1)
		return 1;
	if (*row1 * *(row1 + 1) * *(row1 + 2) == 8)
		return 2;
	// The second line and are 3/6 Time will tell the difference 
	if (*row2 * *(row2 + 1) * *(row2 + 2) == 1)
		return 1;
	if (*row2 * *(row2 + 1) * *(row2 + 2) == 8)
		return 2;
	// The sum of the third line is 3/6 Time will tell the difference 
	if (*row3 * *(row3 + 1) * *(row3 + 2) == 1)
		return 1;
	if (*row3 * *(row3 + 1) * *(row3 + 2) == 8)
		return 2;
	// The first column and are 3/6 Time will tell the difference 
	if (*row1 * *row2 * *row3 == 1)
		return 1;
	if (*row1 * *row2 * *row3 == 8)
		return 2;
	// The sum of the second column is 3/6 Time will tell the difference 
	if (*(row1+1) * *(row2 + 1) * *(row3 + 1) == 1)
		return 1;
	if (*(row1+1) * *(row2 + 1) * *(row3 + 1) == 8)
		return 2;
	// The sum of the third column is 3/6 Time will tell the difference 
	if (*(row1 + 2) * *(row2 + 2) * *(row3 + 2) == 1)
		return 1;
	if (*(row1 + 2) * *(row2 + 2) * *(row3 + 2) == 8)
		return 2;
	// The sum of diagonals is 3/6 To decide between the winners and the losers 
	if (*(row1 + 0) * *(row2 + 1) * *(row3 + 2) == 1)
		return 1;
	if (*(row1 + 0) * *(row2 + 1) * *(row3 + 3) == 8)
		return 2;
	// The sum of the inverse diagonals is 3/6 To decide between the winners and the losers 
	if (*(row1 + 2) * *(row2 + 1) * *(row3 + 0) == 1)
		return 1;
	if (*(row1 + 2) * *(row2 + 1) * *(row3 + 0) == 8)
		return 2;
	return 0;
}
// A chess player makes a specified modification to the specified chessboard .
void play(chessBoard* board, piece* onePiece ) {
	//board: Designated chessboard 
	//piece: Once , It contains the positions of players and players (x,y)
	const int x = onePiece->x - 1;
	const int y = onePiece->y - 1;
	const int player = onePiece->player;
	*((int*)(board->arr) + 3 * x + y) = player;
	(board->num)++;
	return;
}
// Print chessboard 
void printBoard(chessBoard* board) {
	for (int i = 0; i < 3;i++) {
		for (int j = 0; j < 3;j++) {
			printf("%d ", *((int*)(board->arr) + 3 * i + j));
		// If the code here is removed (int *) That would make a mistake . This shows that the meaning of the array name of a two-dimensional array may not be &arr[0][0].
		}
		printf("\n");
	}
	return;
}
// Check whether each drop is legal ： Don't fall where you've already fallen 
int examine(chessBoard* board ,piece* onePiece) {
	const int x = onePiece->x-1;
	const int y = onePiece->y-1;
	const int* addr = (int*)(board->arr);
	if (*(addr + 3 * x + y) == 0) {
		return 1;// Fall in 0 It's legal 
	}
	return 0;// Otherwise it's illegal 
}





// When writing a function , Many local variables are created to accept function parameters again . This wastes memory to some extent （ But it's not long ）, But it can simplify the subsequent code and help clarify ideas .

#2 Several repaired bug

1. Fixed player 1 after winning , The second player also needs to input questions

2. Fixed the problem that players can play in repeated positions when playing chess

#3 Accumulated experience

1. The meaning of the array name of a two-dimensional array needs to be clear . In terms of time ,int arr[3][3] Of arr Is it right? int* Pointer to type , The value is equal to &arr[0][0], But the meaning is not the first address of a two-dimensional array . If you want to use the first address of a binary array for pointer operation , You need to use cast ：arr1=(int* )(arr). The meaning of the converted pointer is equivalent to the first address of a two-dimensional array , have access to *(arr1+3*i+j) Take out [i,j] Subscript elements .

2. The multi file programming used in writing a project is not particularly clear , Although it is used correctly this time .

3. When analyzing a complex project , Still should follow TDD The idea of , Let test drive development . We should carefully consider the basic functions and basic objects of the actual operation of the program , And possible problems . In particular , You need to be in main Set up the framework of program operation in function , Abstract out basic functions and basic objects , Declare the appropriate functions and structures in the header file （ about C In terms of language ）, And write notes . Finally, it is implemented in the source file （ function ）.

otherwise , There may be some unexpected problems .

Brother Peng is to build the overall framework first , And then realize the specific project ; Besides , He pays special attention to the portability of the code .