呵呵，乘着51大好的春光，又做了个东西，本来想做成cs的awp甩枪训练的（里面的presslag就是想达到这种效果），可是反复实验，根本甩不到，所以就作为一个射击的模拟程序了。

当然，还有一些地方应该改进的，比如太阳应该会动、路上应该有车在开、背景应该再做漂亮一点，可是睡了一觉醒来，就不想改动了。呵呵，以后会发上改进的版本，这里先发个Demo了。

另外程序没有注解，呵呵，因为就这么几行，如果大家觉得其中的一些计算方法应该改进，请指出，谢谢！！！

#include<graphics.h>
#include<dos.h>
#include<conio.h>
#include<stdlib.h>
#include<math.h>

#define Timer 0x1c

#ifdef __cplusplus
#define __CPPARGS ...
#else
#define __CPPARGS
#endif

int TimerCounter=0;

void interrupt ( *oldhandler)(__CPPARGS);

void interrupt newhandler(__CPPARGS){
    TimerCounter++;
    oldhandler();
}
void SetTimer(void interrupt(*IntProc)(__CPPARGS)){
    oldhandler=getvect(Timer);
    disable();
    setvect(Timer,IntProc);
    enable();
}
void CloseTimer(){
    disable();
    setvect(Timer,oldhandler);
    enable();
}

void initmouse(int x,int y){
    union REGS reg;
    reg.x.ax=1;
    int86(0x33,&reg,&reg);
    reg.x.ax=7;
    reg.x.cx=100;
    reg.x.dx=540;
    int86(0x33,&reg,&reg);
    reg.x.ax=8;
    reg.x.cx=50;
    reg.x.dx=300;
    int86(0x33,&reg,&reg);
    reg.x.ax=4;
    reg.x.cx=x;
    reg.x.dx=y;
    int86(0x33,&reg,&reg);
}

void mouseh(){
    union REGS reg;
    reg.x.ax=2;
    int86(0x33,&reg,&reg);
}

void getmxy(int *x,int *y){
    union REGS reg;
    reg.x.ax=3;
    int86(0x33,&reg,&reg);
    *x=reg.x.cx;
    *y=reg.x.dx;
}

int leftbtnp(){
    union REGS reg;
    reg.x.ax=3;
    int86(0x33,&reg,&reg);
    if(reg.x.bx & 1)
        return 1;
    else
        return 0;
}

void printbg(int x,int y){
    int i;
    setcolor(5);
    rectangle(x,y,x+440,y+250);
    if(x>0){
        line(0,210,x,y+150);
        if(y>0)
            line(0,0,x,y);
        if(y<100)
            line(0,349,x,y+250);
    }
    if(x<200){
        line(640,210,x+440,y+150);
        if(y>0)
            line(640,0,x+440,y);
        if(y<100)
            line(640,350,x+440,y+250);
    }
    setcolor(1);
    setfillstyle(1,9);
    bar(x+1,y+1,x+439,y+100);
    setfillstyle(1,6);
    bar(x+1,y+101,x+439,y+249);
    setcolor(4);
    setfillstyle(1,4);
    pieslice(x+350,y+50,0,360,10);
    circle(x+350,y+50,12);
    setcolor(2);
    setfillstyle(1,10);
    for(i=0;i<10;i++){
        pieslice(x+200-i*5,y+101+i*15,90,180,15);
        pieslice(x+240+i*5,y+101+i*15,0,90,15);
    }
}

printob(int x,int y,int b){
    setcolor(1);
    setfillstyle(1,3);
    if(b){
        circle(x,y,15);
        floodfill(x,y,1);
    }
    else{
        circle(x,y-7,5);
        floodfill(x,y-7,1);
        circle(x-7,y-1,5);
        floodfill(x-7,y-1,1);
        circle(x-7,y+5,5);
        floodfill(x-7,y+5,1);
        circle(x+8,y+3,8);
        floodfill(x+8,y+3,1);
    }
}

void printfocus(int b,int c){
    if(!b && !c)
        setcolor(14);
    else
        setcolor(4);
    line(320,170,320,180);
    line(310,175,330,175);
    circle(320,175,10);
}

void printsc(int x,int y,char *st,char *ss){
    setcolor(15);
    outtextxy(x+40,y+10,st);
    outtextxy(x+360,y+10,ss);
}

main(){
    int gdriver=EGA,gmode=EGAHI;
    int px=100,py=50,mx=320,my=175,by=230,bx=0,vx=0,vy=0;
    int total=0,score=0,pressed=0,presslag=0,canhit=1;
    int curpage=0;
    char strt[3]="0",strs[3]="0",*str="You have hit    balls.";
    randomize();
    initgraph(&gdriver,&gmode,"d:\\software\\turboc2");
    setbkcolor(1);
    settextstyle(0,0,2);
    SetTimer(newhandler);
    initmouse(mx,my);
    printbg(px,py);
    while(total<101){
        nosound();
        if(kbhit())break;
        if(TimerCounter>0){
            TimerCounter=0;
            getmxy(&mx,&my);
            px=420-mx;
            py=225-my;
            if(!pressed && !presslag && leftbtnp()){
                sound(500);
                pressed=1;
                presslag=7;
            }
            if(!presslag && pressed){
                pressed=0;
                presslag=3;
            }
            if(pressed && canhit){
                if((pow((px+bx-320),2)+pow((py+by-175),2))<225){
                    sound(50);
                    canhit=0;
                    vx=0;
                    vy=0;
                    score++;
                    sprintf(strs,"%d",score);
                }
            }
            if(by>=230){
                canhit=1;
                by=random(100)+130;
                vy=-30;
                if(random(2)){
                    bx=random(100)+20;
                    vx=15;
                }
                else{
                    bx=random(100)+320;
                    vx=-15;
                }
                total++;
                sprintf(strt,"%d",total);
            }
            by+=vy;
            vy+=4;
            bx+=vx;
            curpage=1-curpage;
            setactivepage(curpage);
            cleardevice();
            printbg(px,py);
            printob(px+bx,py+by,canhit);
            printfocus(pressed,presslag);
            printsc(px,py,strt,strs);
            setvisualpage(curpage);
            if(presslag>0)
                presslag--;
        }
    }
    CloseTimer();
    cleardevice();
    if(total==101){
        if(score==100)
            str="You hit them all!!!";
        else{
            str[13]=strs[0];
            str[14]=strs[1];
        }
    }
    else{
        getch();
        str="Game is over by kbhit.";
    }
    outtextxy(100,100,str);
    getch();
    setvisualpage(1-curpage);
    getch();
    mouseh();
    closegraph();
}