寻求一C语言画图程序~

老师要一C语言编辑的画图程序~~  没办法啦~~~

追问：是动态的图像吗？？

答案：#include "math.h"
#include "stdio.h"
#include "graphics.h"
#include "time.h"
#define N 10000
float f1(float);
float f2(float);
main()
{float i,x,y;
int gd=DETECT,gm;
initgraph(&gd,&gm,"");
line(0,240,630,240);
line(315,0,315,480);
  outtextxy(317,245,"0");
  outtextxy(14,245,"-6");
  outtextxy(64,245,"-5");
  outtextxy(114,245,"-4");
  outtextxy(164,245,"-3");
  outtextxy(214,245,"-2");
  outtextxy(264,245,"-1");
  outtextxy(364,245,"1");
  outtextxy(414,245,"2");
  outtextxy(464,245,"3");
  outtextxy(514,245,"4");
  outtextxy(564,245,"5");
  outtextxy(614,245,"6");
  outtextxy(317,40,"4");
  outtextxy(317,90,"3");
  outtextxy(317,140,"2");
  outtextxy(317,190,"1");
  outtextxy(317,290,"-1");
  outtextxy(317,340,"-2");
  outtextxy(317,390,"-3");
  outtextxy(317,440,"-4");
  for(i=15;i<630;i+=50)
  {putpixel(i,240,4);
  putpixel(315,i+25,4);}
for(i=0;i<=N;i++)
{
 x=630*i/N;
 y=240-50*f1((x-315)/50);
 putpixel(x,y,1);
}
for(i=0;i<=N;i++)
{
 x=630*i/N;
 y=240-50*f2((x-315)/50);
 putpixel(x,y,4);
}
getch();
closegraph();
}
float f1(float x)
{float y;
  y=x;
  return(y);
}
float f2(float x)
{float y;
  y=3*x;
  return(y);
}
这是我编写的能绘制函数图像的程序，可也显示两个函数

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