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标题:求助急需答案
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胡宇峰
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求助急需答案

#include <stdio.h>
#include<dos.h>
#include<stdlib.h>       /*其它说明*/
#include<string.h>       /*字符串函数*/
#include<mem.h>          /*内存操作函数*/
#include<ctype.h>        /*字符操作函数*/
#include<alloc.h>        /*动态地址分配函数*/
#define LEN sizeof(STUDENT)
typedef struct stu       /*定义结构体数组用于缓存数据*/
{char num[6];
char name[5];
int score[3];
int sum;
float average;
int order;
struct stu *next;
}STUDENT;
/*函数原型*/
STUDENT      *init();        /*初始化函数*/
int menu_select();       /*菜单函数*/
STUDENT *create();       /*创建链表*/
void print(STUDENT *head);       /* 显示全部记录*/
void search(STUDENT *head);        /*查找记录*/
STUDENT *delete(STUDENT *head);       /*删除记录*/
STUDENT *sort(STUDENT *head);        /*排序*/
STUDENT *insert(STUDENT *head,STUDENT *new);       /*插入记录*/
void save(STUDENT *head);         /*保存文件*/
STUDENT *load();            /*读文件*/
/*主函数界面*/
main()
{STUDENT *head,new;
head=init();           /*链表初始化,使head的值为NULL*/
for(;;)                /*循环无限次*/
       {switch(menu_select())   
          {                    
      case 1:head=create();break;
      case 2:print(head);break;
      case 3:search(head);break;
      case 4:head=delete(head);break;
      case 5:head=sort(head);break;
      case 6:head=insert(head,&new);break;      /*&new表示返回地址*/
      case 7:save(head);break;
      case 8:head=load(); break;
      case 9:exit(0);           /*如菜单返回值为9则程序结束*/
          }
       }
}
/*初始化函数*/
STUDENT *init()
{
return NULL;      /*返回空指针*/
}
/*菜单选择函数*/
menu_select()
{int n;
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*/
printf("press any key to enter the menu......");       /*按任一键进入主菜单*/
getch();        /*从键盘读取一个字符,但不显示于屏幕*/
clrscr();       /*清屏*/
printf("********************************************************************************\n");
printf("\t\t                    Welcome to\n");
printf("\n\t\t          The student score manage system\n");
printf("*************************************MENU***************************************\n");
printf("\t\t\t1. Enter the record\n");                /*输入学生成绩记录*/
printf("\t\t\t2. Print the record\n");                /*显示*/
printf("\t\t\t3. Search record on name\n");           /*寻找*/
printf("\t\t\t4. Delete a record\n");                 /*删除*/
printf("\t\t\t5. Sort to make new a file\n");         /*排序*/
printf("\t\t\t6. Insert record to list\n");           /*插入*/
printf("\t\t\t7. Save the file\n");                   /*保存*/
printf("\t\t\t8. Load the file\n");                   /*读取*/
printf("\t\t\t9. Quit\n");                           /*退出*/
printf("\n\t\t                 Made by liu chang.\n");
printf("********************************************************************************\n");
printf("\t\t\t\t%d\\%d\\%d\n",d.da_year,d.da_mon,d.da_day);       /*显示当前系统日期*/
do{
        printf("\n\t\t\tEnter your choice(1~9):");
        scanf("%d",&n);
       }while(n<1||n>9);        /*如果选择项不在1~9之间则重输*/
       return(n);               /*返回选择项,主函数根据该数调用相应的函数*/
}
/*输入函数*/
STUDENT *create()
{int i,s;
STUDENT *head=NULL,*p;      /* 定义函数.此函数带回一个指向链表头的指针*/
clrscr();
for(;;)
       {p=(STUDENT *)malloc(LEN);      /*开辟一个新的单元*/
        if(!p)       /*如果指针p为空*/
          {printf("\nOut of memory.");       /*输出内存溢出*/
           return (head);      /*返回头指针,下同*/
          }
        printf("Enter the num(0:list end):");
        scanf("%s",p->num);
        if(p->num[0]=='0') break;        /*如果学号首字符为0则结束输入*/
        printf("Enter the name:");
        scanf("%s",p->name);
        printf("Please enter the %d scores\n",3);      /*提示开始输入成绩*/
        s=0;                    /*计算每个学生的总分,初值为0*/
        for(i=0;i<3;i++)        /*3门课程循环3次*/
          {
           do{
       printf("score%d:",i+1);
       scanf("%d",&p->score[i]);
       if(p->score[i]<0 || p->score[i]>100)       /*确保成绩在0~100之间*/
       printf("Data error,please enter again.\n");
      }while(p->score[i]<0 || p->score[i]>100);
      s=s+p->score[i];       /*累加各门成绩*/
          }
          p->sum=s;         /*将总分保存*/
          p->average=(float)s/3;      /*先用强制类型转换将s转换成float型,再求平均值*/
          p->order=0;                 /*未排序前此值为0*/
          p->next=head;               /*将头结点做为新输入结点的后继结点*/
          head=p;                     /*新输入结点为新的头结点*/
       }
       return(head);
}
/* 显示全部记录函数*/
void print(STUDENT *head)
{int i=0;         /* 统计记录条数*/
STUDENT *p;      /*移动指针*/
clrscr();
p=head;          /*初值为头指针*/
printf("\n************************************STUDENT************************************\n");
printf("-------------------------------------------------------------------------------\n");
printf("| Rec |       Num       |       Name       |      Sc1      |      Sc2      |      Sc3      |      Sum      |       Ave       | Order |\n");
printf("-------------------------------------------------------------------------------\n");
while(p!=NULL)
       {
        i++;
        printf("| %3d |      %4s       |       %-4s       |      %3d      |      %3d      |      %3d      |      %3d      |      %4.2f      |      %-5d|\n",
        i, p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);
        p=p->next;
       }
printf("-------------------------------------------------------------------------------\n");
printf("**************************************END**************************************\n");
}
/*查找记录函数*/
void search(STUDENT *head)
{STUDENT *p;        /*      移动指针*/
char s[5];         /*存放姓名用的字符数组*/
clrscr();
printf("Please enter name for searching.\n");
scanf("%s",s);
p=head;        /*将头指针赋给p*/
while(strcmp(p->name,s) && p != NULL)      /*当记录的姓名不是要找的,或指针不为空时*/
       p=p->next;         /*移动指针,指向下一结点*/
       if(p!=NULL)             /*如果指针不为空*/
       {printf("\n*************************************FOUND************************************\n");
        printf("-------------------------------------------------------------------------------\n");
        printf("|         Num        |        Name        |      sc1      |      sc2      |      sc3      |      Sum      |       Ave       | Order |\n");
        printf("-------------------------------------------------------------------------------\n");
        printf("|         %4s       |        %4s        |      %3d      |      %3d      |      %3d      |      %3d      |      %4.2f      |      %-5d|\n",
        p->num,p->name,p->score[0],p->score[1],p->score[2],p->sum,p->average,p->order);
        printf("-------------------------------------------------------------------------------\n");
        printf("***************************************END**************************************\n");
        }
       else
         printf("\nThere is no num %s student on the list.\n",s);       /*显示没有该学生*/
}
/*删除记录函数*/
STUDENT *delete(STUDENT *head)
{int n;
STUDENT *p1,*p2;      /*p1为查找到要删除的结点指针,p2为其前驱指针*/
char c,s[6];         /*s[6]用来存放学号,c用来输入字母*/
clrscr();
printf("Please enter the deleted num: ");
scanf("%s",s);
p1=p2=head;        /*给p1和p2赋初值头指针*/
while(strcmp(p1->num,s) && p1 != NULL)       /*当记录的学号不是要找的,或指针不为空时*/
       {p2=p1;                /*将p1指针值赋给p2作为p1的前驱指针*/
        p1=p1->next;          /*将p1指针指向下一条记录*/
       }
if(strcmp(p1->num,s)==0)      /*学号找到了*/
       {printf("**************************************FOUND************************************\n");
        printf("-------------------------------------------------------------------------------\n");
        printf("|         Num        |        Name        |      sc1      |      sc2      |      sc3      |      Sum      |       Ave       | Order |\n");
        printf("-------------------------------------------------------------------------------\n");
        printf("|         %4s       |        %4s        |      %3d      |      %3d      |      %3d      |      %3d      |      %4.2f      |      %-5d|\n",
        p1->num,p1->name,p1->score[0],p1->score[1],p1->score[2],p1->sum,p1->average,p1->order);
        printf("-------------------------------------------------------------------------------\n");
        printf("***************************************END**************************************\n");
        printf("Are you sure to delete the student Y/N ?"); /*提示是否要删除,输入Y删除,N则退出*/
        for(;;)
          {scanf("%c",&c);
           if(c=='n'||c=='N') break;      /*如果不删除,则跳出本循环*/
           if(c=='y'||c=='Y')
             {
              if(p1==head)           /*若p1==head,说明被删结点是首结点*/
              head=p1->next;         /*把第二个结点地址赋予head*/
            else
              p2->next=p1->next;      /*否则将一下结点地址赋给前一结点地址*/
              n=n-1;
              printf("\nNum %s student have been deleted.\n",s);
              printf("Don't forget to save.\n");break;      /*删除后就跳出循环*/
             }
          }
        }
      else
        printf("\nThere is no num %s student on the list.\n",s);      /*找不到该结点*/
return(head);
}
/*排序函数*/
STUDENT *sort(STUDENT *head)
{int i=0;                           /*保存名次*/
STUDENT *p1,*p2,*t,*temp;          /*定义临时指针*/
temp=head->next;                   /*将原表的头指针所指的下一个结点作头指针*/
head->next=NULL;                   /*第一个结点为新表的头结点*/
while(temp!=NULL)                  /*当原表不为空时,进行排序*/
       {
        t=temp;                 /*取原表的头结点*/
        temp=temp->next;        /*原表头结点指针后移*/
        p1=head;                 /*设定移动指针p1,从头指针开始*/
        p2=head;                 /*设定移动指针p2做为p1的前驱,初值为头指针*/
        while(t->average<p1->average&&p1!=NULL)      /*作成绩平均分比较*/
          {
           p2=p1;                /*待排序点值小,则新表指针后移*/
           p1=p1->next;
          }
        if(p1==p2)          /*p1==p2,说明待排序点值大,应排在首位*/
          {
           t->next=p1;         /*待排序点的后继为p*/
           head=t;             /*新头结点为待排序点*/
          }
         else        /*待排序点应插入在中间某个位置p2和p1之间,如p为空则是尾部*/
           {
            t->next=p1;       /*t的后继是p1*/
            p2->next=t;       /*p2的后继是t*/
           }
         }
p1=head;             /*已排好序的头指针赋给p1,准备填写名次*/
while(p1!=NULL)      /*当p1不为空时,进行下列操作*/
       {
        i++;               /*结点序号*/
        p1->order=i;       /*将结点序号赋值给名次*/
        p1=p1->next;       /*指针后移*/
       }
printf("Sorting is sucessful.\n");       /*排序成功*/
return (head);
}
/*插入记录函数*/
STUDENT      *insert(STUDENT *head,STUDENT *new)
{STUDENT *p0,*p1,*p2;
int n,sum1,i;
p1=head;      /*使p1指向第一个结点*/
p0=new;       /*p0指向要插入的结点*/
printf("\nPlease enter a new record.\n");          /*提示输入记录信息*/
printf("Enter the num:");
scanf("%s",new->num);
printf("Enter the name:");
scanf("%s",new->name);
printf("Please enter the %d scores.\n",3);
sum1=0;        /*保存新记录的总分,初值为0*/
for(i=0;i<3;i++)
       {
        do{
           printf("score%d:",i+1);
           scanf("%d",&new->score[i]);
           if(new->score[i]>100||new->score[i]<0)
           printf("Data error,please enter again.\n");
          }while(new->score[i]>100||new->score[i]<0);
        sum1=sum1+new->score[i];        /*累加各门成绩*/
       }
new->sum=sum1;        /*将总分存入新记录中*/
new->average=(float)sum1/3;
new->order=0;
if(head==NULL)      /*原来的链表是空表*/
       {head=p0;p0->next=NULL;}      /*使p0指向的结点作为头结点*/
else
       {while((p0->average<p1->average)&&(p1->next!=NULL))
          {p2=p1;       /*使p2指向刚才p1指向的结点*/
           p1=p1->next;       /*p1后移一个结点*/
          }
        if(p0->average>=p1->average)
          {if(head==p1)head=p0;       /*插到原来第一个结点之前*/
           else p2->next=p0;          /*插到p2指向的结点之后*/
           p0->next=p1;}
        else
          {p1->next=p0;p0->next=NULL;} /*插到最后的结点之后*/
       }
n=n+1; /*结点数加1*/
head=sort(head);      /*调用排序的函数,将学生成绩重新排序*/  ——————————————————————/*能不能在这帮我添加一下
printf("\nStudent      %s have been inserted.\n",new->name);   
printf("Don't forget to save the new file.\n");
return(head);
}
/*保存数据到文件函数*/
void save(STUDENT *head)
{FILE *fp;            /*定义指向文件的指针*/
STUDENT *p;          /* 定义移动指针*/
char outfile[10];
printf("Enter outfile name,for example c:\\score\n");
scanf("%s",outfile);
if((fp=fopen(outfile,"wb"))==NULL)       /*为输出打开一个二进制文件,为只写方式*/
       {
        printf("Cannot open the file\n");
        return;        /*若打不开则返回菜单*/
       }
printf("\nSaving the file......\n");
p=head;                        /*移动指针从头指针开始*/
while(p!=NULL)            /*如p不为空*/
       {
        fwrite(p,LEN,1,fp);         /*写入一条记录*/
        p=p->next;            /*指针后移*/
       }
fclose(fp);          /*关闭文件*/
printf("Save the file successfully!\n");
}
/* 从文件读数据函数*/
STUDENT *load()
{STUDENT *p1,*p2,*head=NULL;        /*定义记录指针变量*/
FILE *fp;                /* 定义指向文件的指针*/
char infile[10];
printf("Enter infile name,for example c:\\score\n");
scanf("%s",infile);
if((fp=fopen(infile,"rb"))==NULL)       /*打开一个二进制文件,为只读方式*/
       {
        printf("Can not open the file.\n");
        return(head);
       }
printf("\nLoading the file!\n");
p1=(STUDENT *)malloc(LEN);       /*开辟一个新单元*/
if(!p1)
       {
        printf("Out of memory!\n");
        return(head);
       }
head=p1;             /*申请到空间,将其作为头指针*/
while(!feof(fp))      /*循环读数据直到文件尾结束*/
       {
        if(fread(p1,LEN,1,fp)!=1) break;      /*如果没读到数据,跳出循环*/
        p1->next=(STUDENT *)malloc(LEN);      /*为下一个结点开辟空间*/
        if(!p1->next)
          {
           printf("Out of memory!\n");
           return (head);
          }
p2=p1;             /*使p2指向刚才p1指向的结点*/
p1=p1->next;       /*指针后移,新读入数据链到当前表尾*/
       }
p2->next=NULL;       /*最后一个结点的后继指针为空*/
fclose(fp);
printf("You have success to read data from the file!\n");
return (head);
}
搜索更多相关主题的帖子: include 结构体 average 字符串 动态 
2009-08-30 21:13
胡宇峰
Rank: 1
等 级:新手上路
帖 子:3
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收藏
得分:0 
速求
2009-08-30 21:15
胡宇峰
Rank: 1
等 级:新手上路
帖 子:3
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收藏
得分:0 
  或者帮我弄一个功能把80分以上评为优秀就可以了 求求了
2009-08-30 21:41
快速回复:求助急需答案
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