C語言詳細講解通過遞歸實現(xiàn)掃雷的展開
用戶選擇菜單
void menu()
{
printf("****************************\n");
printf("******** 1.play **********\n");
printf("******** 0.exit **********\n");
printf("****************************\n");
}用戶按1進入游戲
棋盤初始化
void Itnboard(char board[ROWS][COLS], int rows, int cols,char c)
{
int i, j;
for (i = 0; i < rows; i++)
{
for (j = 0; j <cols; j++)
{
board[i][j] = c;
}
}
}創(chuàng)建數(shù)組,并對其進行初始化
布置雷(隨機布置)
void Setboard(char board[ROWS][COLS], int row, int col)
{
int count = Easy_count;
while (count)
{
int x = rand() % row+1;
int y = rand() % col+1;
if (board[x][y] == '0')
{
board[x][y] = '1';
count--;
}
}
}用time函數(shù)產(chǎn)生隨機值
打印棋盤
void Displayboard(char board[ROWS][COLS], int row, int col)
{
int i, j;
for (i = 0; i <= col; i++)
{
printf("%d ", i);
}
printf("\n");
for (i = 1; i <= row; i++)
{
printf("%d ", i);
for (j = 1; j <= col; j++)
{
printf("%c ", board[i][j]);
}
printf("\n");
}
}打印棋盤
玩家下棋
void Player(char board[ROWS][COLS], char show[ROWS][COLS], int row, int col)
{
int x, y;
int count = 0;
while (1)
{
printf("請排雷:\n");
scanf("%d %d", &x, &y);
if (x >= 1 && x <= 9 && y >= 1 && y <= 9)
{
if (board[x][y] == '0')
{
Openboard(show, board, x, y);
Displayboard(show, ROW, COL);
}
else if (board[x][y] == '1')
{
printf("你死了\n");
break;
}
}
else
{
printf("請重新輸入");
}
int i, j;
for (i = 1; i <= row; i++)
{
for (j = 1; j <= col; j++)
{
if (show[i][j] == '*')
{
count++;
}
}
}
if (count == Easy_count)
{
printf("成功\n"); //這里的判斷條件是遍歷整個數(shù)組,統(tǒng)計雷的個數(shù),如果雷的個數(shù)等于所剩余未排的*,說明排雷成功
break;
}
}
}用戶輸入值,并進行判斷,如果該位置沒有雷,我們進入展開函數(shù)
棋盤展開
void Openboard(char show[ROWS][COLS], char board[ROWS][COLS], int row, int col)
{
if (row >= 1 && row <= ROW && col >= 1 && col <= COL)
{
int count=sum(board, row, col);
if (count != 0)
{
show[row][col] = count + '0';
}
else if (show[row][col] != '_')
{
show[row][col] = '_';
int i = 0, j = 0;
for (i = row - 1; i <= row + 1; i++)
{
for (j = col - 1; j <= col + 1; j++)
{
Openboard(show, board, i,j);
}
}
}
else
{
return;
}
}
}如果用戶輸入的這個位置沒有雷,我們對其周圍8個位置進行判斷是否有雷,若有雷,我們把雷的個數(shù)顯示在該位置上,若其周圍8個位置沒有雷并且不是下劃線,我們把這個位置賦值為下劃線,然后并對其8個位置進行同樣的判斷,如果周圍沒雷,而且周圍的棋子也不是下劃線,我們對其進行返回。
展開部分思維導圖

展開函數(shù)最后一個else return 作用
這里我們show棋盤有三種情況,
1.該位置是*
2.該位置是下劃線
3.該位置是雷的個數(shù)
else
return;
這里是作用:如果是下劃線,我們就返回上一層函數(shù)。因為如果這里不是下劃線,我們會在else return 之前的語句中進行判斷,并對其周圍8個位置進行操作,然后再對這8個棋子各個周圍8個位置進行判斷并操作,如果這里是下劃線,就說明由這個位置為中心的周圍8個棋子已經(jīng)判斷過了,并且以這8個位置為中心,已經(jīng)遞歸過了,我們不需要再進行判斷,所以直接返回就行
周圍雷個數(shù)判斷
int sum(char board[ROWS][COLS], int x, int y)
{
return (board[x - 1][y - 1] +
board[x - 1][y] +
board[x - 1][y + 1] +
board[x][y - 1] +
board[x][y + 1] +
board[x + 1][y - 1] +
board[x + 1][y] +
board[x + 1][y + 1] - 8 * '0');
}test.c
#include"game.h"
void menu()
{
printf("****************************\n");
printf("******** 1.play **********\n");
printf("******** 0.exit **********\n");
printf("****************************\n");
}
void game()
{
char board[ROWS][COLS] = { 0 };
char show[ROWS][COLS] = { 0 };
Itnboard(board, ROWS, COLS,'0'); //初始化棋盤
Itnboard(show, ROWS, COLS, '*');
Setboard(board, ROW, COL);
Displayboard(board, ROW, COL);
Player(board, show, ROW, COL); //玩家輸入
}
int main()
{
int input=1;
srand((unsigned int)time(NULL));
do{
menu();
scanf("%d", &input);
switch (input)
{
case 1:
game();
break;
case 0:
break;
default:
printf("輸入錯誤請重新輸入:\n ");
}
} while (input);
}game.c
#include"game.h"
void Itnboard(char board[ROWS][COLS], int rows, int cols,char c)
{
int i, j;
for (i = 0; i < rows; i++)
{
for (j = 0; j <cols; j++)
{
board[i][j] = c;
}
}
}
void Displayboard(char board[ROWS][COLS], int row, int col)
{
int i, j;
for (i = 0; i <= col; i++)
{
printf("%d ", i);
}
printf("\n");
for (i = 1; i <= row; i++)
{
printf("%d ", i);
for (j = 1; j <= col; j++)
{
printf("%c ", board[i][j]);
}
printf("\n");
}
}
void Setboard(char board[ROWS][COLS], int row, int col)
{
int count = Easy_count;
while (count)
{
int x = rand() % row+1;
int y = rand() % col+1;
if (board[x][y] == '0')
{
board[x][y] = '1';
count--;
}
}
}
int sum(char board[ROWS][COLS], int x, int y)
{
return (board[x - 1][y - 1] +
board[x - 1][y] +
board[x - 1][y + 1] +
board[x][y - 1] +
board[x][y + 1] +
board[x + 1][y - 1] +
board[x + 1][y] +
board[x + 1][y + 1] - 8 * '0');
}
void Player(char board[ROWS][COLS], char show[ROWS][COLS], int row, int col)
{
int x, y;
int count = 0;
while (1)
{
printf("請排雷:\n");
scanf("%d %d", &x, &y);
if (x >= 1 && x <= 9 && y >= 1 && y <= 9)
{
if (board[x][y] == '0')
{
Openboard(show, board, x, y);
Displayboard(show, ROW, COL);
}
else if (board[x][y] == '1')
{
printf("你死了\n");
break;
}
}
else
{
printf("請重新輸入");
}
int i, j;
for (i = 1; i <= row; i++)
{
for (j = 1; j <= col; j++)
{
if (show[i][j] == '*')
{
count++;
}
}
}
if (count == Easy_count)
{
printf("成功\n");
break;
}
}
}
void Openboard(char show[ROWS][COLS], char board[ROWS][COLS], int row, int col)
{
if (row >= 1 && row <= ROW && col >= 1 && col <= COL)
{
int count=sum(board, row, col);
if (count != 0)
{
show[row][col] = count + '0';
}
else if (show[row][col] != '_')
{
show[row][col] = '_';
int i = 0, j = 0;
for (i = row - 1; i <= row + 1; i++)
{
for (j = col - 1; j <= col + 1; j++)
{
Openboard(show, board, i,j);
}
}
}
else
{
return;
}
}
}game.h
#include<stdio.h> #include<stdlib.h> #include<time.h> #define ROW 9 #define COL 9 #define ROWS ROW+2 #define COLS COL+2 #define Easy_count 10 void Itnboard(char board[ROWS][COLS], int rows, int cols,char c); void Displayboard(char board[ROWS][COLS], int row, int col); void Setboard(char board[ROWS][COLS], int row, int col); void Player(char board[ROWS][COLS], char show[ROWS][COLS], int row, int col); void Openboard(char show[ROWS][COLS], char board[ROWS][COLS], int row, int col);
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