graph.cpp

学生成绩管理系统。实现学生的添加 删除和各科成绩管理。

/*|\ 
  |
  |
  |
  |
  |                             _
  |                   _        |_|        _
  |                  |_|       |_|       |_|
  |                  |_|       |_|       |_|
  |         _        |_|       |_|       |_|
  |        |_|       |_|       |_|       |_|        _
  |        |_|       |_|       |_|       |_|       |_|
  |        |_|       |_|       |_|       |_|       |_|
  |        |_|       |_|       |_|       |_|       |_|
  +----------------------------------------------------------->
         60以下     60-69     70-79     80-89     90-100
*/

#include <strstrea.h>
#include <iomanip.h>
#include "KeyScan.h"
#include "clsScoreSheet.h"
#include "funcdeclear.h"
#include <string.h>

#define __max(a,b) (((a)>(b))?(a):(b))

void showgraph(int x)
{
	char scr[18][70]={0};
	int i,j;
	for (i=0; i<=16; i++) for (j=0; j<69; j++) scr[i][j]=32;
	for (i=0; i<=14; i++) scr[i][3]='|';
	for (i=4; i<=62; i++) scr[15][i]='-';
	scr[0][2]='/';		scr[0][4]='\\';
	scr[15][63]='>';	scr[15][3]='+';
	strcpy(scr[16],"          60以下     60-69     70-79     80-89     90-100");

	int cnt[5]={0}, cnt2[5] , score, maxcnt=0;
	for (i=0; i<s.GetStudentCount(); i++)
	{
		score=s.GetScoreInt(i,x,0,1);
		if (score>=9000) cnt[4]++;
		else if (score>=8000) cnt[3]++;
		else if (score>=7000) cnt[2]++;
		else if (score>=6000) cnt[1]++;
		else if (score>=0) cnt[0]++;
		else ;
	}

	for (i=0; i<5; i++) maxcnt=__max(maxcnt,cnt[i]);
	for (i=0; i<5; i++) cnt2[i]=(int)((double)(cnt[i]*14)/maxcnt+0.5);

	for (i=0; i<5; i++)
	{
		for (j=14; j>=14-cnt2[i]+1; j--)
		{
			scr[j][10*i+12]='|';
			scr[j][10*i+13]='_';
			scr[j][10*i+14]='|';
		}
		scr[j][10*i+13]='_';
	}
	
	ostrstream oss(scr[17],70);
	for (i=0; i<5; i++) oss<<setw(i==0?14:8)<<cnt[i]<<"人";

	int ch;
	while (1)
	{
		showheader();
		for (i=0; i<=17; i++) cout<<"     "<<scr[i]<<'\n';
		cout<<"\n                   我想...\n"
			<<"                             保存这张图表... Ctrl+S\n"
			<<"                             返回               Esc\n"
			<<flush;
		
		ch=scankey(0,0,'s'-96,KEY_ESC,0);
		if (ch==KEY_ESC) return;
		savegraph(scr);
	}
}