柱状图表示学生成绩各分数段比率

这个程序主要是实现用柱状图形来显示学生各分数段的比率情况,还有些小问题没改正,而且这里的分数我先用随机赋值了,假如要赋值的话该下赋值函数以及改变下程序的结构就可以了.写得不是很好,请大家多多指教.

#define N 20
#include "stdlib.h"
#include <graphics.h>
int i,j;
Funscore(int *score,int *bilv)/*输入N个学生的成绩,我这里先采用随机赋值了*/
{randomize();
 for(i=0;i<N;i++)
 score[i]=random(101);/*随机赋值*/
 for(i=0;i<N;i++)
 {
 if(score[i]==100)
  bilv[9]++;
 else
  {
  j=(score[i]/10);
  bilv[j-1]++;
  }/*这个是计算比率的数组*/
 }
 gotoxy(1,1);
 for(i=0;i<N;i++)/*输出数据演示用*/
 printf("%4d",score[i]);
}
Drowxy()/*画坐标轴函数*/
{
 line(50,400,460,400);/*x轴*/
 line(460,400,455,405);
 line(460,400,455,395);
 line(50,400,50,90);/*y轴*/
 line(50,90,45,95);
 line(50,90,55,95);
 for(i=373;i>=100;i-=30)/*x轴具体画图*/
 line(48,i,52,i);
 outtextxy(35,400,"0");
 outtextxy(30,370,"10");
 outtextxy(30,340,"20");
 outtextxy(30,310,"30");
 outtextxy(30,280,"40");
 outtextxy(30,250,"50");
 outtextxy(30,220,"60");
 outtextxy(30,190,"70");
 outtextxy(30,160,"80");
 outtextxy(30,130,"90");
 outtextxy(23,100,"100");
 for(i=90;i<450;i+=40)/*y轴具体画图*/
 line(i,402,i,398);
 outtextxy(60,410,"10");
 outtextxy(100,410,"20");
 outtextxy(140,410,"30");
 outtextxy(180,410,"40");
 outtextxy(220,410,"50");
 outtextxy(260,410,"60");
 outtextxy(300,410,"70");
 outtextxy(340,410,"80");
 outtextxy(380,410,"90");
 outtextxy(420,410,"100");
 outtextxy(470,400,"score");/*坐标内容声明*/
 outtextxy(25,80,"(%)");
}
Fundrow(int *bilv)/*画柱状图形*/
{
 for(i=60,j=0;i<450;i+=40,j++)
 {
 setfillstyle(SOLID_FILL,j+2);
 bar(i,399-300*bilv[j]/N,i+20,399);
 }
}
 main()
{int gd=DETECT,gr;
 int score[N],bilv[10]={0};
 initgraph(&gd,&gr,"");
 Funscore(score,bilv);/*输入数据*/
 Drowxy();/*画坐标*/
 Fundrow(bilv);/*具体画柱状图形*/
 getch();
 closegraph();
}