[C++知识库]c语言 2.“别碰方块”（自学用）

来源《C和C++游戏趣味编程》——童晶

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
#include <graphics.h>
#define RAND_MAX 50

int main()
{
	float width, height, gravity;
	float ball_x, ball_y, ball_vy, radius;
	float rect_left_x, rect_top_y, rect_width, rect_height,rect_vx;
	int score = 0;
	int flag = 1;   
	
	int isBallFloor = 1;

	width = 600;
	height = 400;
	gravity = 0.6;

	initgraph(width, height);//初始化游戏界面

	radius = 20;
	ball_x = width / 4;
	ball_y = height - radius;
	ball_vy = 0;

	rect_height = 100;
	rect_width = 20;
	rect_left_x = width * 3 / 4;
	rect_top_y = height - rect_height;
	rect_vx = -3;

	while (flag)
	{
		if (_kbhit())
		{
			char input = _getch();
			if (input == ' '&&isBallFloor)
			{
				ball_vy = -16;
				isBallFloor = 0;
			}
		}
		ball_vy += gravity;
		ball_y += ball_vy;
		if (ball_y >= height - radius)
		{
			ball_vy = 0;
			ball_y = height - radius;
			isBallFloor = 1;

		}
		rect_left_x += rect_vx;
		if (rect_left_x <= 0)
		{
			rect_left_x = width;
			score++;  
			srand(time(NULL));
			rect_height = rand() % 100 ;
		}
		

		if ((rect_left_x <= ball_x + radius) &&
			(rect_left_x + rect_width >= ball_x - radius) &&
			(height - rect_height <= ball_y + radius))
		{
			Sleep(50);
			printf("GAME OVER");
			break;
		}
		cleardevice();
		fillcircle(ball_x, ball_y, radius);
		fillrectangle(rect_left_x, height - rect_height, rect_left_x + rect_width, height);

		TCHAR s1[] = _T("Your score is ");
		outtextxy(10, 20, s1);

		TCHAR s[1000];
		_stprintf_s(s, _T("%d"), score);		
		outtextxy(10, 40, s);
		Sleep(5);
	}

	closegraph();
	return 0;
}