C语言实现24点游戏计算器的示例代码

#pragma once

#include <stdio.h>
#include <stdlib.h>

#pragma once

#include <stdbool.h>
#include <math.h>

#define PRECISION 1E-6
#define TARGET 24
#define SIZE 4

/*
* 最终表达式由四个数、括号、运算符组成，其大小不会超过
* 5 * (SIZE - 1) + SIZE * 2 + 1
*/


typedef struct card
{
	double value;
	char expression[5 * (SIZE - 1) + SIZE * 2 + 1];
} Card, *pCard;

bool game24(pCard card, int size);

#define _CRT_SECURE_NO_WARNINGS

#include "Main.h"
#include "PointGame.h"

/*
* 牌堆中计算24点
*   card  牌堆
*   size  个数
*/
bool game24(pCard card, int size)
{
	Card stack[3];
	/*
	* 如果牌堆里只有一张牌，判断是否就是需要的目标
	*/
	if (size == 1)
	{
		if (fabs(card[0].value - TARGET) < PRECISION)
		{
			printf("%d = %s\n", TARGET, card[0].expression);
			return true;
		}
		else
		{
			return false;
		}
	}
	/*
	*从牌堆中任选两张牌
	*/
	int m, n, i, t;
	for (m = 0; m < size - 1; m++)
	{
		for (n = m + 1; n < size; n++)
		{
			/*
			* 剩余的牌放入新牌堆
			*/
			t = 0;
			for (i = 0; i < size; i++)
			{
				if (i != m && i != n)
				{
					stack[t].value = card[i].value;
					sprintf(stack[t].expression, "%s", card[i].expression);
					t++;
				}
			}
			/*
			* 选中两张牌的和放入新牌堆
			*/
			stack[size - 2].value = card[m].value + card[n].value;
			sprintf(stack[size - 2].expression, "(%s + %s)", card[m].expression, card[n].expression);

			if (game24(stack, size - 1))
			{
				return true;
			}
			/*
			* 选中两张牌的差放入新牌堆
			*/
			if (card[m].value > card[n].value)
			{
				stack[size - 2].value = card[m].value - card[n].value;
				sprintf(stack[size - 2].expression, "(%s - %s)", card[m].expression, card[n].expression);
			}
			else
			{
				stack[size - 2].value = card[n].value - card[m].value;
				sprintf(stack[size - 2].expression, "(%s - %s)", card[n].expression, card[m].expression);
			}

			if (game24(stack, size - 1))
			{
				return true;
			}

			/*
			* 选中两张牌的积放入新牌堆
			*/
			stack[size - 2].value = card[m].value * card[n].value;
			sprintf(stack[size - 2].expression, "%s * %s", card[m].expression, card[n].expression);

			if (game24(stack, size - 1))
			{
				return true;
			}

			/*
			* 选中两张牌的商放入新牌堆
			*/
			if (card[m].value != 0)
			{
				stack[size - 2].value = card[n].value / card[m].value;
				sprintf(stack[size - 2].expression, "%s / %s", card[n].expression, card[m].expression);

				if (game24(stack, size - 1))
				{
					return true;
				}
			}

			if (card[n].value != 0)
			{
				stack[size - 2].value = card[m].value / card[n].value;
				sprintf(stack[size - 2].expression, "%s / %s", card[m].expression, card[n].expression);

				if (game24(stack, size - 1))
				{
					return true;
				}
			}
		}
	}
	return false;
}

#define _CRT_SECURE_NO_WARNINGS

#include "Main.h"
#include "PointGame.h"



int main()
{
	system("color 3E");

	int i, poke;
	Card card[SIZE];

	printf("请输入4个数字 以判断解法:");
	for (i = 0; i < SIZE; i++)
	{
		scanf("%d", &poke);
		card[i].value = (double)poke;
		sprintf(card[i].expression, "%d", poke);
	}

	if (game24(card, SIZE))
	{
		printf("Done\n");
	}
	else
	{
		printf("No Answer\n");
	}

	system("pause");
	return 0;
}