雨滴.c

C语言实现雨滴模拟

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <time.h>
#include <dos.h>
#include <graphics.h>
#define LEN sizeof(struct rainDrop)



int rainDropNumber=60;
struct rainDrop *head;

struct rainDrop
{
	int startX;
	int startY;
       int endY;
	int curX;
	int curY;
	int color;
	int step;
      int length;
      struct rainDrop *next;
};



struct rainDrop *creatDrop(void)
{
	struct rainDrop *p;
	p=(struct rainDrop *)malloc(LEN);
	p->startX=rand()%640;
	p->startY=rand()%430;
      p->endY=430+rand()%50;

	p->curX=p->startX;
	p->curY=p->startY;
	p->step=8;
	p->color=rand()%15+1;
      p->length=rand()%10+10; 
      p->next=NULL;
	return(p);
}
void recreatDrop(struct rainDrop *p)
{
	p->startX=rand()%640;
	p->startY=rand()%430;
	p->endY=430+rand()%50;
	p->curX=p->startX;
	p->curY=p->startY;
	p->step=8;
	p->color=rand()%15+1;
	p->length=rand()%10+10;
}


void initgraphics()
{
    int gmode,gdriver;
    gdriver=DETECT;
    initgraph(&gdriver,&gmode,"");
}
void drawLine(struct rainDrop *p){
	       setcolor(p->color);
		line(p->startX,p->startY,p->curX,p->curY);
	}
void clearLine(struct rainDrop *p){
	       setcolor(BLACK);
		line(p->startX,p->startY,p->curX,p->curY);
	}
void updateLine(struct rainDrop *p){
	       
              if(p->step%5==0)
		p->step++;
	      
              p->curY+=p->step;
	        p->startY=p->curY-p->length;
		 
	}

void rainDropDown(struct rainDrop *p){
	           if(p->curY>=p->endY)
                 {
                      clearLine(p);
                      recreatDrop(p);
                  
                  }else
                 {
                  clearLine(p);
		     updateLine(p);
		     drawLine(p);
                 }
			     
	}
void creatRain(void)
{
	struct rainDrop *p1,*p2;
	int i;
	p1=p2=creatDrop();
	head=p1;
	for(i=0;i<rainDropNumber;i++)
	{
		p2=creatDrop();
		p1->next=p2;
		p1=p2;
	}
}


void clearAll()
{    
    struct rainDrop *p,*pf;
	p=head;
	while(p!=NULL)
	{
		pf=p;
		p=p->next;
		free(pf);
	}
   
    closegraph();
}
main()
{
   struct rainDrop *p;
    initgraphics();   
    creatRain();
    
    p=head;
       while(!kbhit()){  
       
        if(p==NULL){
           p=head;
        }                   
        else{
        
        rainDropDown(p);
       
                                    
        
        } 
             p=p->next;
             delay(50);
	}    
		     
	         
	        
		    
     
    getch();
    clearAll();

}