C语言实现三子棋主要用到二维数组的相关知识，所以我们使用多文件编程来实现这个程序，需要建立一个头文件，两个源文件来实现： 1.game.h–>函数的申明与宏定义 2.game.c–>游戏各个功能的实现 3.main.c–>函数的定义
思路： 1.将各个函数的执行放在游戏执行函数game函数中，将game函数放在循环中以便我们游戏结束后还可以玩。 2.选择结构判断继续玩玩游戏还是退出游戏,得有一个main()函数实现，我们把这个框架放在main.c中：
具体代码模块 main.c
#include"game.h" #define _CRT_SECURE_NO_WARNINGS 1 void Menu() { printf("############################\n"); printf("## 欢迎来到三子棋 ##\n"); printf("############################\n"); printf("## 1.Play 2.Exit ##\n"); printf("############################\n"); printf("请选择:> "); } int main() { int quit = 0; while (!quit) {//如果不退出 Menu(); int select = 0; scanf("%d", &select); switch (select) { case 1: Game(); break; case 2: quit = 1; break; default: printf("你输错了，请重新输入！\n"); break; } } printf("byebye!\n"); system("pause"); }game.h
#ifndef __GAEM_H__ #define __GAME_H__ #include<stdio.h> #include<windows.h> #include<time.h>//随机数 #pragma warning (disable:4996) //宏定义放在头文件 #define ROW 3 #define COL 3 #define Player_C 'X' #define Computer_C 'O' #define INIT ' ' //在game.c里实现 void InitBoard(char board[][COL], int row, int col);//行可以省略，列不可以 void ShowBoard(char board[][COL], int row, int col); void ComputerMove(char board[][COL], int row, int col); char Judge(char board[][COL], int row, int col); void Game(); #endifgame.c
#include"game.h" void InitBoard(char board[][COL], int row, int col)//行可以省略，列不可以 { int i = 0; for (; i < row; i++) { int j = 0; for (; j < col; j++) { board[i][j] = INIT; } } } void ShowBoard(char board[][COL], int row, int col) { printf(" 1 | 2 | 3 \n"); printf("---------------\n"); int i = 0; for (; i < row; i++){ printf("%d |",i+1); int j = 0; for (; j < col; j++) { printf("%c |", board[i][j]); } printf("\n"); printf("---------------\n"); } /*printf("3 |"); for (int j = 0; j < col; j++) { printf("%c |", board[2][j]); } printf("\n"); printf("---------------\n");*/ } void ComputerMove(char board[][COL], int row, int col) { while (1) { int x = rand() % row; int y = rand() % col; if (board[x][y] == ' ') { board[x][y] = Computer_C; break; } } } char Judge(char board[][COL], int row, int col) { int i = 0; for (; i < row; i++) { if(board[i][0]==board[i][1]&&\ board[i][1]==board[i][2]&&\ board[i][0] != ' '){ return board[i][0]; } } for (i = 0; i < col; i++) { if (board[0][i] == board[1][i] && \ board[1][i] == board[2][i] && \ board[0][i] != ' ') { return board[i][0]; } } if (board[0][0] == board[1][1] && \ board[1][1] != ' ' && \ board[1][1] == board[2][2]) { return board[1][1]; } if (board[0][2] == board[1][1] && \ board[1][1] != ' ' && \ board[1][1] ==board[2][0]) { return board[1][1]; } for (i = 0; i < row; i++) { int j = 0; for (; j < col; j++) { if (board[i][j] == INIT) { return 'N'; } } } return 'F'; } void Game() { srand((unsigned long)time(NULL));//种下一个随机数种子 char board[ROW][COL]; InitBoard(board, ROW, COL); char result = 0; do { ShowBoard(board, ROW, COL); printf("请落子:> "); int x = 0; int y = 0; scanf_s("%d %d", &x, &y); if (x <= 0 || x > 3 || y <= 0 || y > 3) { printf("你输入的位置有误，请重新输入！\n"); continue; } if (board[x - 1][y - 1] != ' ') { printf("该位置已经被占用，请重新输入！\n"); } board[x - 1][y - 1] = Player_C; result = Judge(board, ROW, COL); if (result != 'N') {//'N'->next,'F'->FULL,'X','O' break; } ComputerMove(board, ROW, COL); result = Judge(board, ROW, COL); if (result != 'N') {//'N'->next,'F'->FULL,'X','O' break; } } while(1); if (result == Player_C) { printf("恭喜你，你赢了！\n"); } else if (result == Computer_C) { printf("不好意思，你输了!\n"); } else { printf("还不错，平手!\n"); } printf("你玩的还不错，要不要再来一把!\n"); }测试效果
