学生成绩管理

#include<bios.h>
#include<dos.h> /*头文件*/
#include<conio.h>
#include<ctype.h>
#include<process.h>
#include<stdlib.h>
#include<stdio.h>
#include<string.h>

#define NULL 0
#define ESC 0x001b /* 退出 */
#define F1 0x3b00 /* 查看帮助信息,调用HelpMassage()函数 */
#define F2 0x3c00 /*输入学生成绩*/
#define F3 0x3d00 /*按学号查找*/
#define F4 0x3e00 /*按姓名查找*/
#define F5 0x3f00 /*列出所有学生成绩*/
#define F6 0x4000 /*统计*/
struct stuType /*定义结构体变量*/
{
 char NO[11]; /*学号长度为10*/
 char XM[10];
 float CJ[4]; /*包含4门成绩*/
};
/*-------------2-------------*/
int JY_NO(char *stu_num,FILE *fp) /*检验学号的正确性*/
{
 struct stuType stud;
 int NO;
 char *p=stu_num;
 if(strcmp(stu_num,"#")==0) return 1; /*若输入"#"返回真值,不再循环输入*/
 while(*p!=NULL) /*学号必须是数字,否则返回重新输入*/
 {
  NO=(int)*p;
  if(NO<48||NO>57)
  { puts("/t/t/tError number!Please input again!/n");
  return 0;
  }
  else p++; /*指针加1*/
 }
 if(strlen(stu_num)!=10) /*若学号长度不为10,则返回重新输入*/
 {
  puts("/t/t/tThe length of number is wrong!/n");
  return 0;
 }
 if(getchar()!='/n') /*若学号后面的字符不是回车符,则学号长度大于10*/
 { printf("/t/t/tThe length of number more than ten!Please input again!/n");
 do{}while(getchar()!='/n'); /*用getchar接收多余的字符*/
 return 0;
 }
 else
 {
  rewind(fp); /*使文件指针指向头*/
  while(!feof(fp)) /*若文件指针未到结尾,就继续执行下面的循环,feof遇到文件结束符返回非零值,否则返回0*/
  { fread(&stud,sizeof(struct stuType),1,fp); /*读取一定长度的数据*/
  if(strcmp(stu_num,stud.NO)==0) /*学号的唯一性*/
  { printf("/t/t/tThe same number,Please input again!/n");
  printf("/t/t/tThis studnet scores is:/n");
  printf("/t/t/tChinese:%.1f/n",stud.CJ[0]);
  printf("/t/t/tMaths:%.1f/n",stud.CJ[1]);
  printf("/t/t/tEnglish:%.1f/n",stud.CJ[2]);
  printf("/t/t/t总评:%.1f/n",stud.CJ[3]);
  return 0;
  }
  }
 }
 return 1;
 
}
/*-------------3-------------*/
int JY_NO2(char *stu_num) /*检验学号*/
{ int NO;
char *p=stu_num;
if(strcmp(stu_num,"#")==0)return 1; /*若输入“#”,则返回真值结束*/
if(strlen(stu_num)!=10) /*学号长度为10*/
{ puts("/t/t/tThe length of number is wrong!/n");
return 0;
}
while(*p!=NULL) /*学号必须用数字,若包含有字母,或其它字符则返回假值重新输入*/
{ NO=(int)*p;
if(NO<48||NO>57)
{ puts("/t/t/tError number!Please input again!/n");
return 0;
}
else p++; /*指针加1*/
}
if(getchar()!='/n') /*检验学号长度是否大于10,并把多余的字符去掉*/
{
 printf("/t/t/tThe length of number is more than ten!Please input again!/n");
 do{}while(getchar()!='/n');
 return 0;
}
return 1;
}
/*-------------4-------------*/
int JY_XM(char *p) /*检验姓名*/
{
 if(strlen(p)>5||getchar()!='/n') /*姓名长度不得大于5个*/
 { printf("/t/t/tThe length of name must less than five!Please input again!/n");
 do{}while(getchar()!='/n');
 return 0;
 }
 else return 1; /*字符串全为汉字返回真*/
}
/*-------------5-------------*/
int JY_CJ(float stu_CJ) /*学生成绩只能在0~100之间*/
{
 if(stu_CJ<0||stu_CJ>100)
 { printf("/t/t/tError input,score input must between0~100!/n");
 return 0;
 }
 return 1;
}
/*-------------6-------------*/
void CreatFile() /*输入文件*/
{ FILE *fp;
struct stuType stu,stu0={"","",}; /*对stu0先赋值*/
fp=fopen("stu.dat","wb+"); /*打开或创建一个二进制文件,打开时将原来的内容删除*/
if(fp==NULL)
{ printf("/t/t/tFile open failure!/n/t/t/tPress any key to return...");
getch();
return;
}
else
{ while(1)
{ stu=stu0;
do{ printf("/n/t/t/tPlease input number (ten char):"); /*输入学号并检验其正确性*/
scanf("%10s",stu.NO);
}while(!JY_NO(stu.NO,fp));
if(strcmp(stu.NO,"#")==0)break;
do{ printf("/n/t/t/tPlease input name:"); /*输入姓名并检验其正确性*/
scanf("%10s",stu.XM);
}while(!JY_XM(stu.XM));
do{ printf("/n/t/t/tPlease input Chinese score:"); /*输入成绩并检验其正确性*/
scanf("%f",&stu.CJ[0]);
}while(!JY_CJ(stu.CJ[0]));
do{ printf("/n/t/t/tPlease input Maths score:"); /*同上*/
scanf("%f",&stu.CJ[1]);
}while(!JY_CJ(stu.CJ[1]));
do{ printf("/n/t/t/tPlease input English score:");
scanf("%f",&stu.CJ[2]);
}while(!JY_CJ(stu.CJ[2]));
do{ printf("/n/t/t/tPlease input 总评:");
scanf("%f",&stu.CJ[3]);
}while(!JY_CJ(stu.CJ[3]));
fwrite(&stu,sizeof(struct stuType),1,fp); /*写文件*/
}
}
fclose(fp); /*关闭文件*/
}
/*-------------7-------------*/
void Search_Xuehao() /*按学号查询*/
{ FILE *fp;
int flag;
struct stuType stu,stud;
fp=fopen("stu.dat","rb");
if(fp==NULL) /*若文件打不开则输出下面的信息*/
{ printf("/t/t/tFile open failure!/n/t/t/tPress any key to return...");
getch();
return;
}
else
{ do{ puts("/n/t/t/tInput /"#/" end find");
do{ printf("/t/t/tPlease input a student's number to find:");
scanf("%10s",stu.NO);
}while(!JY_NO2(stu.NO));
if(strcmp(stu.NO,"#")==0)break; /*若输入“#”则结束循环*/
flag=0;
rewind(fp);
while(fread(&stud,sizeof(struct stuType),1,fp)) /*检查文件指针结束*/
{ if(strcmp(stu.NO,stud.NO)==0) /*比较学号*/
{ puts("/t/t/tThis student score is:");
printf("/t/t/tNumber:%s/n",stud.NO);
printf("/t/t/tName:%s/n",stud.XM);
printf("/t/t/tChinese:%.1f/n",stud.CJ[0]);
printf("/t/t/tMaths:%.1f/n",stud.CJ[1]);
printf("/t/t/tEnglish:%.1f/n",stud.CJ[2]);
printf("/t/t/t总评:%.1f/n",stud.CJ[3]);
flag=1; /*记录学号是否查到*/
}
}
if(flag==0)puts("/t/t/tNo this number!");
}while(strcmp(stu.NO,"#")!=0);
}
fclose(fp); /*关闭文件*/

}
/*-------------8-------------*/
void Search_Xingming() /*按姓名查找*/
{ FILE *fp;
int flag=0;
struct stuType stu,stud;
fp=fopen("stu.dat","rb");
if(fp==NULL)
{ printf("/t/t/tFile open failure!/n/t/t/tPress any key to return...");
getch();
return;
}
else
{ do{
 do{ printf("/t/t/tPlease input a student's name to find:");
 scanf("%10s",stu.XM);
 }while(!JY_XM(stu.XM));
 rewind(fp); /*文件指针指向头*/
 while(fread(&stud,sizeof(struct stuType),1,fp))
 { if(strcmp(stu.XM,stud.XM)==0) /*比较姓名是否相同*/
 { puts("/t/t/tThis student name is:");
 printf("/t/t/tNumber:%s/n",stud.NO);
 printf("/t/t/tName:%s/n",stud.XM);
 printf("/t/t/tChinese:%.1f/n",stud.CJ[0]);
 printf("/t/t/tMaths:%.1f/n",stud.CJ[1]);
 printf("/t/t/tEnglish:%.1f/n",stud.CJ[2]);
 printf("/t/t/t总评:%.1f/n",stud.CJ[3]);
 flag=1; /*记录姓名是否被查到*/
 }
 }
 if(flag==0)puts("/n/t/t/tNo this student!");
 puts("/t/t/tContinue or not(y--continue,other return)?");
}while(getch()=='y');
}
fclose(fp);
/* puts("/t/t/tPress any key to continue...");*/
/* getch();*/
}
/*-------------9-------------*/
int ListFile(void) /*输出文件,列出所有学生成绩*/
{ FILE *fp;
int REC=0; /*记录学生人数*/
struct stuType stu;
fp=fopen("stu.dat","rb");
if(fp==NULL)
{ printf("/t/t/tFile open failure!/n/t/t/tPress any key to return...");
getch();
return 1;
}
else{ printf("/t/t/tThe student score:/n");
printf("/t/t/tNumber/t/tName/tChinese/tMaths/tEnglish/t总评/n");
rewind(fp);
while(fread(&stu,sizeof(struct stuType),1,fp))
{ /*每读取一个长度的数据就输出*/
 printf("/t/t/t%s",stu.NO);
 printf("/t%s",stu.XM);
 printf("/t%.1f",stu.CJ[0]);
 printf("/t%.1f",stu.CJ[1]);
 printf("/t%.1f",stu.CJ[2]);
 printf("/t%.1f",stu.CJ[3]);
 printf("/n");
 REC++;
 if(REC%20==0) /*每输出20个学生成绩,停一下*/
 { printf("/t/t/tPress any key to continue.../n");
 getch();
 }
}
}
fclose(fp); /*关闭文件*/
printf("/t/t/tPress any key to continue...");
getch();

}
/*-------------10-------------*/
void Statistics() /*统计及格和优秀人数*/
{ FILE *fp;
int REC=0,pass[4]={0},good[4]={0}; /*REC--记录个数,即人数,pass--及格人数,good--优秀人数*/
float highest[4]={0},score[4]={0}; /*highest--最高分,score--总分*/
struct stuType stu;
fp=fopen("stu.dat","rb");
if(fp==NULL)
{ printf("/t/t/tFile open failure!/n/t/t/tPress any key to return...");
getch();
return;
}
else { rewind(fp);
while(fread(&stu,sizeof(struct stuType),1,fp))
{ REC++;
score[0]=score[0]+stu.CJ[0]; /*Chinese*/
if(stu.CJ[0]>=60)pass[0]++;
if(stu.CJ[0]>=80)good[0]++;
if(highest[0]<stu.CJ[0])highest[0]=stu.CJ[0];
score[1]=score[1]+stu.CJ[1]; /*Maths*/
if(stu.CJ[1]>=60)pass[1]++;
if(stu.CJ[1]>=80)good[1]++;
if(highest[1]<stu.CJ[1])highest[1]=stu.CJ[1];
score[2]=score[2]+stu.CJ[2]; /*English*/
if(stu.CJ[2]>=60)pass[2]++;
if(stu.CJ[2]>=80)good[2]++;
if(highest[2]<stu.CJ[2])highest[2]=stu.CJ[2];
score[3]=score[3]+stu.CJ[3]; /*总评*/
if(stu.CJ[3]>=60)pass[3]++;
if(stu.CJ[3]>=80)good[3]++;
if(highest[3]<stu.CJ[3])highest[3]=stu.CJ[3];
}
if(REC==0) /*可以防止记录为0是REC作除数而造成的错误*/
{ printf("/t/t/tThe record of student is not input!Press any key to return...");
getch();
return;
}
else{
 printf("/t/t/t/tChinese/t  Maths/t  English/t 总评/n"); /*输出统计信息*/
 printf("/tAverage:                %.1f/t  %.1f/t  %.1f/t         %.1f/n",score[0]/REC,score[1]/REC,score[2]/REC,score[3]/REC);
 printf("/tHighest score:          %.1f/t  %.1f/t  %.1f/t         %.1f/n",highest[0],highest[1],highest[2],highest[3]);
 printf("/tGood student number:    %d/t  %d/t  %d/t         %d/n",good[0],good[1],good[2],good[3]);
 printf("/tPassed number:          %d/t  %d/t  %d/t         %d/n",pass[0],pass[1],pass[2],pass[3]);
}
}
fclose(fp);
printf("/n/t/t/tPress any key to continue...");
getch();

}
/*-------------11-------------*/
void HelpMessage()
{ clrscr();
printf("/n/n/n/n/n/t/t/t/tThis is the help~~");/*自己写帮助*/
getch();
}
/*-------------12-------------*/
int GetKey(void) /*此函数返回一个按键的数值*/
{ int key;
key=bioskey(0); /*bioskey为调用BIOS键盘接口*/
if(key<<8) /*位移*/
{
 key=key&0x00ff;
 
}
return key; /*返回按键*/
}
/*-------------13-------------*/
void main()
{ int key;
struct date d; /*定义时间结构体*/
getdate(&d); /*读取系统日期并把它放到结构体d中*/
clrscr(); /*清除屏幕*/
printf("/n/n/n/n/n");
printf("/t/t/t**************************************/n"); /*版本信息*/
printf("/t/t/t Student score management system1.0 /n");
printf("/t/t/t**************************************/n");
printf("/t/t/t Maker:  /n");
printf("/t/t/t Teacher:--- /n");
printf("/t/t/t Finish time:2004year 5month /n");
printf("/t/t/t**************************************/n");
printf("/t/t/tPress any key to continue...");
/*while(!kbhit());*/
getch(); /*从键盘读取一个字符,但不显示于屏幕*/
system("cls"); /*调用DOS的清屏函数,TC中可用clrscr代替*/
while(1) /*主菜单*/
{
 printf("/n/n/n/n/n");
 printf("/t/t/t*****************************************/n");
 printf("/t/t/t**/tF1 --Show help                 **/n");
 printf("/t/t/t**/tF2 --Input data to save        **/n");
 printf("/t/t/t**/tF3 --Find score by number      **/n");
 printf("/t/t/t**/tF4 --Find score by name        **/n");
 printf("/t/t/t**/tF5 --Output file               **/n");
 printf("/t/t/t**/tF6 --Find passed and Good      **/n");
 printf("/t/t/t**/tESC--Exit                      **/n");
 printf("/t/t/t*****************************************/n");
 printf("/n/tPlease input your choice:/t/t%dyear %dmonth %dday/n/n",d.da_year,d.da_mon,d.da_day); /*提示信息,并显示当前系统日期*/
 key=GetKey(); /*调用自定义函数,读取一个键*/
 switch(key)
 {
 case F1: HelpMessage(); break;
 case F2: CreatFile(); break;
 case F3: Search_Xuehao(); break;
 case F4: Search_Xingming();break;
 case F5: ListFile(); break;
 case F6: Statistics(); break;
 case ESC:exit(1); break;
 default: puts("/t/t/tYou input a error option!");
  printf("/t/t/tPress any key to continue...");
  getch();
 }
 clrscr(); /*每执行完一项功能后,自动清屏*/
}
}