练习36 内存的动态分配实现雷霆战机小游戏

#include <stdio.h>#include <stdlib.h>#include <graphics.h>#include <time.h>#include <conio.h>#pragma comment(lib,"winmm.lib")
//子弹 敌机typedef struct Node{  int x;  int y;
  struct Node* pnext;}ZiDan,DiJi;
ZiDan* pZidan = NULL; //pZidan 链表DiJi*  pDiJi = NULL;  //pDiJi  链表int  xx = 100;int  yy = 500;
//创建链表void CreateList(){  //子弹  pZidan = (ZiDan*)malloc(sizeof(ZiDan));  pZidan->pnext = NULL;  //防止野指针
  //敌机  pDiJi = (DiJi*)malloc(sizeof(DiJi));  pDiJi->pnext = NULL;  //防止野指针}

//增加节点void AddNode(Node* P,int a)  //形参 接收实参  a 区分到底是子弹还是敌机{  //定义一个新的节点  Node* pnew = NULL;
  //为新的节点开辟空间  pnew = (Node*)malloc(sizeof(Node));
  if (a == 1)  //子弹  {    //填充节点的内容    pnew->x = xx;    pnew->y = yy;  }  else if (a == 2) //敌机   {    pnew->x = rand() % 450;    pnew->y = 0;  }
  //把节点连接起来  pnew->pnext =P->pnext;  P->pnext = pnew;}
//判断子弹打到敌机void Shoot(){  DiJi* pdr = pDiJi->pnext;   //临时的敌人节点用来遍历  DiJi* pdrpre = pDiJi;    //pdr前一个节点  删除掉pdr  ZiDan* pzd = pZidan->pnext; //临时的子弹节点 用来遍历子弹链表  ZiDan* pzdpre = pZidan;
  while (pdr != NULL)  //遍历所有的敌机  {    pzd = pZidan->pnext;     pzdpre = pZidan;
    while (pzd != NULL)    {      if (pzd->x >= pdr->x - 10 && pzd->x <= pdr->x + 50 &&        pzd->y >= pdr->y - 20 && pzd->y <= pdr->y + 20)      {        pzdpre->pnext = pzd->pnext;  //前一个和后一个连起来        free(pzd);

        pdrpre->pnext = pdr->pnext;        free(pdr);
        pdr = pDiJi->pnext;        pdrpre = pDiJi;        break;      }      else      {        pzd = pzd->pnext;        pzdpre = pzdpre->pnext;      }    }
    pdr = pdr->pnext;    pdrpre = pdrpre->pnext;  }}
int main(){  initgraph(500, 600);
  char ch;
  PlaySound(L"./res/The Mass.wav", NULL, SND_LOOP | SND_FILENAME | SND_ASYNC);
    srand((unsigned int)time(NULL));
  //增加子弹的个数  //初始值位置   100 500
  //创建链表  CreateList();
  while (1)  {//======================敌机================================================    //添加节点    AddNode(pDiJi, 2);

    //显示节点的内容(数据用到绘制矩形上面去)    Node* ptemp1 = pDiJi->pnext;    while (ptemp1 != NULL)    {      //使用节点中的数据去绘制矩形      rectangle(ptemp1->x, ptemp1->y, ptemp1->x + 50, ptemp1->y + 20);
      //控制这个矩形的移动      ptemp1->y += 20;
      //指向下一个节点      ptemp1 = ptemp1->pnext;    }//=======================子弹================================================    //添加节点    AddNode(pZidan,1);
    Sleep(100);    cleardevice();
    //显示节点的内容(数据用到绘制矩形上面去)    Node* ptemp = pZidan->pnext;    while (ptemp != NULL)    {      //使用节点中的数据去绘制矩形      rectangle(ptemp->x, ptemp->y, ptemp->x + 10, ptemp->y + 20);
      //控制这个矩形的移动      ptemp->y -= 20;
      //指向下一个节点      ptemp = ptemp->pnext;    }
    Shoot();
    if (kbhit())    {      ch = getch();
      switch (ch)      {
      case 75:        xx -= 10;        break;
      case 77:        xx += 10;        break;
      }
    }
  }


  return 0;}


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