三子棋小游戏可分解为以下过程：
1，设置一个游戏选择界面：
界面源代码如下：
void menu()
{
while (1)
{
printf("欢迎访问\n");
printf("1.play 2.exit\n");
printf("请选择：");
int i;
scanf_s("%d", &i);
if (i == 1)
game();
if (i == 2)
break;
}
}
2，玩家落子以及系统落子，并显示落子后界面。
落子源代码：
void play(char arr[][3])
{
int x, y;
while (1)
{
printf("请选择你要下的行数：");
scanf_s("%d", &x);
printf("请选择你你要下的列数：");
scanf_s("%d", &y);
if (x > 3 || y > 3|| x < 1|| y < 1)
{
printf("你棋盘大小有误！\n");
continue;
}
else
if (arr[x - 1][y - 1] != ' ')
{
printf("该格已被占用");
continue;
}
else
arr[x - 1][y - 1] = player;
break;
}
}
void pc(char arr[][3])
{
void srand(unsigned int seed);
int x, y;
while (1)
{
x = rand() % 4;
y = rand() % 4;
if (arr[x - 1][y - 1] != ' ')
{
continue;
}
else
arr[x - 1][y - 1] = computer;
break;
}}
3，落子完毕后判断胜负。
判断源代码：
char judge(char arr[][3])
{
char flag = 0;
for (int i = 0; i < 3; i++)
{
if (arr[0][i] == arr[1][i] && \
arr[1][i] == arr[2][i] && \
arr[1][i] != ' ')
{
flag = arr[1][i];
break;
}
}
for (int j = 0; j < 3; j++)
{
if (arr[j][0] == arr[j][1] && \
arr[j][2] == arr[j][1] && \
arr[j][0] != ' ')
{
flag = arr[j][0];
break;
}
}if (arr[0][0] == arr[1][1] && \
arr[2][2] == arr[1][1] && \
arr[0][0] != ' ')
{
flag = arr[0][0];
}
if (arr[0][2] == arr[1][1] && \
arr[1][1] == arr[2][0] && \
arr[1][1] != ' ')
{
flag = arr[0][2];
}
if (flag == 0)
{
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
{
if (arr[i][j] == ' ')
{
flag = 2;
break;
}
}
}
return flag;}
**#include<stdio.h>
#include<time.h>
#include <stdlib.h>
#pragma warning (disable:4996)
#define player 'o';
#define computer 'x';
void show(char arr[][3])
{
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 3; j++)
printf("[%c]",arr[i][j]);
printf("\n");
}
}
void play(char arr[][3])
{
int x, y;
while (1)
{
printf("请选择你要下的行数：");
scanf_s("%d", &x);
printf("请选择你你要下的列数：");
scanf_s("%d", &y);
if (x > 3 || y > 3|| x < 1|| y < 1)
{
printf("你棋盘大小有误！\n");
continue;
}
else
if (arr[x - 1][y - 1] != ' ')
{
printf("该格已被占用");
continue;
}
else
arr[x - 1][y - 1] = player;
break;
}
}
void pc(char arr[][3])
{
void srand(unsigned int seed);
int x, y;
while (1)
{
x = rand() % 4;
y = rand() % 4;
if (arr[x - 1][y - 1] != ' ')
{
continue;
}
else
arr[x - 1][y - 1] = computer;
break;
}}
char judge(char arr[][3])
{
char flag = 0;
for (int i = 0; i < 3; i++)
{
if (arr[0][i] == arr[1][i] && \
arr[1][i] == arr[2][i] && \
arr[1][i] != ' ')
{
flag = arr[1][i];
break;
}
}
for (int j = 0; j < 3; j++)
{
if (arr[j][0] == arr[j][1] && \
arr[j][2] == arr[j][1] && \
arr[j][0] != ' ')
{
flag = arr[j][0];
break;
}
}if (arr[0][0] == arr[1][1] && \
arr[2][2] == arr[1][1] && \
arr[0][0] != ' ')
{
flag = arr[0][0];
}
if (arr[0][2] == arr[1][1] && \
arr[1][1] == arr[2][0] && \
arr[1][1] != ' ')
{
flag = arr[0][2];
}
if (flag == 0)
{
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
{
if (arr[i][j] == ' ')
{
flag = 2;
break;
}
}
}
return flag;}
void game()
{
char arr[3][3];
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
arr[i][j] = ' ';
while (1)
{
play(arr);
printf("*\n");
show(arr);
char i = judge(arr);
if (i != 2 && i != 'o' && i != 'x')
{
printf("和棋");
break;
}
if (i == 'o')
{
printf("你胜了！");
break;
}
if (i == 'x')
{
printf("你输了！");
break;
}
pc(arr);
printf("*\n");
show(arr);
i = judge(arr);
if (i != 2 && i != 'o' && i != 'x')
{
printf("和棋");
break;
}
if (i == 'o')
{
printf("你胜了！");
break;
}
if (i == 'x')
{
printf("你输了！");
break;
}
}}
void menu()
{
while (1)
{
printf("欢迎访问\n");
printf("1.play 2.exit\n");
printf("请选择：");
int i;
scanf_s("%d", &i);
if (i == 1)
game();
if (i == 2)
break;
}
}
int main()
{
menu();
return 0;
}
**