其中多处坐标的代码是经过运算移项推导出的
#include<easyx.h>
#include<conio.h>
#include<time.h>
#include<stdio.h>
bool Timer(int id, int ms)//计时器，过了多少毫秒就会返回真
{static long start[3] = { 0 };long last = clock();if (last - start[id] >= ms){start[id] = last;return true;}else return false;
}
void fail()
{settextstyle(600, 0, 0);settextcolor(RED);outtextxy(800, 500, "你死了!");EndBatchDraw();_getch();
}
class Car {
public:short x, y;COLORREF color;void isHit(short objx, short objy){if (!(x > objx + 65 || x + 65 < objx || 715 > objy || 885 < objy))fail();}void show(){setfillcolor(color);solidcircle(x + 10, y + 10, 10);solidcircle(x + 55, y + 10, 10);solidrectangle(x + 20, y + 20, x + 45, y + 65);solidcircle(x + 10, y + 75, 10);solidcircle(x + 55, y + 75, 10);//长度65，宽度85}};class Npc :public Car
{
public:bool isLive = false;static Npc* p;static int* a;bool overLap(int j){for (int i = 0; i < 6; i++){if (i == j || p[i].isLive == false)continue;if (!(x > p[i].x + 65 || x + 65 < p[i].x || 86 < p[i].y))return true;}return false;}static void loop(Car*player,int j) {for (int i = 0; i < 6; i++){int c = 0;if (p[i].isLive == false && rand() % 100 == 0){short n1 = a[j], n2 = a[j + 1 > 53 ? 0 : j + 1], n3 = a[j + 2 > 53 ? j - 52 : 2], length;short max = (n1 > n2 ? n1 : n2) > n3 ? (n1 > n2 ? n1 : n2) : n3;short min = (n1 < n2 ? n1 : n2) < n3 ? (n1 < n2 ? n1 : n2) : n3;length = min + 835 - max;//max-min+900-65，算出车辆x坐标可出现的变动值do { p[i].x = rand() % length + 10 + max; }//随机偏移量加上最右边的道路方块起始坐标while (p[i].overLap(i) && c++ < 1000);p[i].isLive = true;p[i].y = 1;p[i].color = RGB(rand() % 200 + 56, rand() % 200 + 56, rand() % 200 + 56);}}for (int i = 0; i < 6; i++){if (p[i].isLive){if (p[i].y >= 1080)p[i].isLive = false;p[i].y += 20;p[i].show();player->isHit(p[i].x, p[i].y);//判断有没有撞击敌机}}}
};
Npc* Npc::p = 0;
int* Npc::a = 0;
int main()
{short a[54] = { 0 };//道路两旁横坐标数组,为了生成蜿蜒曲折的路,用数组模拟双向循环链表short dire = 0, lastdire = 0, c = 0, t = 30, change = 0, behind = 0, j = 0, metre = 0;//c为道路绵延相同方向的次数ExMessage ex = { 0 }; bool mouseclick = 0; char str[128];Car player;player.x = 500, player.y = 800, player.color = RGB(0, 255, 255);Npc npc[6];Npc::p = npc;srand(time(0));//车路宽度为920initgraph(1920, 1080);setbkmode(TRANSPARENT);settextstyle(100, 0, 0);settextcolor(GREEN);_getch();while (1){if (peekmessage(&ex, EX_MOUSE))//监听鼠标事件{switch (ex.message){case WM_LBUTTONDOWN:if (ex.x > player.x && ex.x < player.x + 45)mouseclick = 1;break;case WM_LBUTTONUP:mouseclick = 0;}if (mouseclick)//只有拖拽不放才能移动，不能单击任意位置实现瞬移player.x = ex.x - 22;}if (Timer(1, 3000) && t > 5)t--;if (Timer(2, t * 4)){metre++;sprintf_s(str, "%d米", metre);}if (Timer(0, t)){BeginBatchDraw();cleardevice();int color = 255;for (int i = 0; i < 54; i++){int index, x;if (j + i > 53)index = j + i - 54;else index = j + i;x = a[index];setfillcolor(RGB(color, color, 0));color -= 4;//道路颜色变淡solidrectangle(x, i * 20 + 1, x + 10, i * 20 + 21);x += 910;solidrectangle(x, i * 20 + 1, x + 10, i * 20 + 21);}player.show();Npc::loop(npc, j);for (int i = 3, y = 40 + j; i < 6; i++)//检测主角是否撞到道路{int index, x;if (y + i > 53)index = y + i - 54;else index = y + i;x = a[index];if (x + 10 > player.x || x + 865 < player.x)fail();}outtextxy(0, 0, str);if (j-- == -1)//j为道路最前面对应的数组下标,自减后是新一轮的下标{behind = 0;j = 53;}else behind = j + 1;if (c >= 13)dire = rand() % 3 - 1;if (dire == lastdire)c++;else c = 1;lastdire = dire;change = dire * 2 * (rand() % 4 + 1);int tmp = a[behind] + change;if (tmp > 0 && tmp <= 1000)a[j] = tmp;else a[j] = a[behind];//前面的路受后面影响 EndBatchDraw();}}
}
)
