C语言单链表版学生信息管理系统

//以单链表作为存储结构，设计和实现课程成绩管理的完整程序。
//程序包括如下功能。 
//1.建立学生成绩表，包含学生的学号、姓名和成绩。 
//2.可以显示所有学生成绩。 
//3.可以计算学生的总数。 
//4.可以按学号和序号查找学生。 
//5.可以在指定位置插入学生成绩数据。 
//6.可以删除指定位置的学生数据。 
//7.可以把学生成绩按从高到低的顺序排序。 
 
//作者： yinlinqvan 
//操作系统：Mac OS X 
//编译器：gcc 
 
#include "string.h" 
#include "sys/malloc.h" 
#include "stdlib.h" 
#include "stdio.h" 
#include "time.h" 
#include "sys/types.h" 
#define MAXSIZE 100 
 
typedef struct Student 
{ 
 char sname[9]; 
 char sno[5]; 
 int score; 
}DataType; 
 
typedef struct 
{ 
 DataType data; 
 struct Node *next; 
}LinkList; 
 
LinkList * inputdata(); 
 
void display(LinkList * p); 
 
//遍历链表 
void displayAll(LinkList * L); 
 
//插入 
LinkList * createTailList();//尾插 
LinkList * createHeadList();//头插 
 
//查询 
void getElem(LinkList * L,int i);//按序号 
void locateElemBysno(LinkList * L,char ch[]);//按值 
void locateElemBysname(LinkList * L,char ch[]); 
 
int lengthList(LinkList * L); 
 
//插入 
void insertElem(LinkList * L,int i);//在第i个结点前进行插入 
void insertElemBysno(LinkList * L,char ch[5]);//按学号 
 
void deleteElem(LinkList * L,char ch[]); 
 
//排序 
void insertSort(LinkList * L); 
 
int menue(); 
 
int main(int argc,char *argv[]) 
{ 
 LinkList *L; 
 char sno[5] = {''}; 
 char sname[9] = {''}; 
 int b = 1; 
 int i = 1; 
 while (b) { 
  switch(menue()) 
  { 
   case 1: 
    L = createTailList(); 
    //L = createHeadList(); 
    break; 
   case 2: 
    //displayAll(L); 
    printf("t◎输入插入哪个位置前："); 
    scanf("%d",&i); 
    insertElem(L,i); 
    //scanf("%s",sno); 
    //insertElemBysno(L,sno); 
    break; 
   case 3: 
    printf("t◎输入待删除学生的学号："); 
    scanf("%s",sno); 
    deleteElem(L,sno); 
    break; 
   case 4: 
    printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
    printf("Ut学生总数为：%dttUn",lengthList(L)); 
    printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
    break; 
   case 5: 
    printf("t◎输入待查找学生的学号："); 
    scanf("%s",sno); 
    locateElemBysno(L,sno); 
    break; 
   case 6: 
    printf("t◎输入待查学生的位置："); 
    scanf("%d",&i); 
    getElem(L,i); 
    break; 
   case 7: 
    displayAll(L); 
    break; 
   case 8: 
    insertSort(L); 
    break; 
   case 9: 
    i = 2; 
    while (i) 
    {      
     system("clear"); 
     printf("33[5m"); 
     printf("33[?25l");  //隐藏光标 
     printf("nnnnnn"); 
     printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
     printf("Ut正在退出(%d秒)ttUn",i--); 
     printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsn"); 
 
     sleep(1); 
    } 
    printf("33[0m"); 
    system("clear"); 
    return 0; 
    break; 
   default: 
    i = 2; 
    while (i) 
    { 
     system("clear"); 
     printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
     printf("U操作数无效，正在返回主菜单(%d秒)Un",i--); 
     printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsn"); 
     sleep(1); 
    } 
    continue; 
  } 
  getchar(); 
  printf("PRESS ENTER TO CONTINUE!"); 
  while (1) { 
   if ('n' == getchar()) 
   { 
    break; 
   } 
  } 
 } 
 return 0; 
} 
int menue() 
{ 
 system("clear"); 
 //警告音 
 printf("33[0m");    //关闭所有属性 
 
 printf("33[44;37m");   //47是字背景颜色,33是字体的颜色 
 printf ("33[5m");    //闪烁 
 printf("n^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^nn"); 
 printf("33[0m");    //关闭所有属性 
  
 printf("33[44;37m"); 
 printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
 printf("Ut学生成绩管理程序tUn"); 
 printf("UttttUn"); 
 printf("Ut<1>创建tttUn"); 
 printf("Ut<2>指定位置后插入tUn"); 
 printf("Ut<3>按位置删除ttUn"); 
 printf("Ut<4>求学生总数ttUn"); 
 printf("Ut<5>按学号查找ttUn"); 
 printf("Ut<6>按位置查找ttUn"); 
 printf("Ut<7>显示所有学生ttUn"); 
 printf("Ut<8>成绩排序ttUn"); 
 printf("Ut<9>退出tttUn"); 
 printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 
 printf ("33[5m"); 
 printf("^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^ ^_^nn"); 
 printf("33[0m");    //关闭所有属性 
 
 time_t rawtime; 
 struct tm * timeinfo; 
 time ( &rawtime ); 
 timeinfo = localtime ( &rawtime ); 
 //printf ( "t07%s",asctime (timeinfo) ); 
  
 printf ("33[;34m"); 
 printf ("t[%4d-%02d-%02d %02d:%02d:%02d]n",1900+timeinfo->tm_year,1+timeinfo->tm_mon,timeinfo->tm_mday,timeinfo->tm_hour,timeinfo->tm_min,timeinfo->tm_sec); 
  
 char colorname[3][20] = {{"RED"},{"BLUE"},{"YELLLOW"}}; 
 srand(time(&rawtime)); //时间触发 
 //textcolor(colorname[rand()%3]); 
 //printf("t[textcolor is %s]n",colorname[rand()%3]); 
 //颜色码和控制码 我的参考链接 http://wenku.baidu.com/view/a38f77ff910ef12d2af9e70b.html 
  
 printf("t◎输入功能项：");  
 int a = 0; 
 scanf("%d",&a); 
 printf("33[0m"); 
 
 system("clear"); 
 return a; 
} 
 
LinkList * inputdata() 
{ 
 LinkList *s = NULL; 
 char sno[5] = {''}; 
 char sname[9] = {''}; 
 int score = 0; 
  
 printf("tsnot->"); 
 scanf("%s",sno); 
 if (sno[0] == '#') { 
  return s; 
 } 
 s = (LinkList *)malloc(sizeof(LinkList)); 
 strcpy(s -> data.sno,sno); 
  
 printf("tsnamet->"); 
 scanf("%s",sname); 
 strcpy(s -> data.sname,sname); 
  
 printf("tscoret->"); 
 scanf("%d",&score); 
 s -> data.score = score; 
  
 printf("n"); 
 return s; 
} 
 
void display(LinkList * p) 
{ 
 printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
 printf("UtsnottsnamettscoretUn"); 
 printf("Ut%stt%stt%-4dtUn",p->data.sno,p->data.sname,p->data.score); 
 printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn");} 
void displayAll(LinkList * L) 
{ 
 printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
 printf("UtsnottsnamettscoretUn"); 
 LinkList * p = L -> next; 
 while(p) 
 { 
  printf("Ut%stt%stt%-4dtUn",p->data.score); 
  p = p -> next; 
 } 
 printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
} 
LinkList * createTailList() 
{ 
 //链表头结点 
 LinkList * L = (LinkList *)malloc(sizeof(LinkList)); 
 //结点 
 LinkList * s = NULL; 
 //尾结点 
 LinkList * r = L; 
          
 printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
 printf("Utt尾插法建立tttUn"); 
 printf("Ut请输入学生信息（当学号为"#"时结束）tUn"); 
 printf("UttttttUn"); 
 printf("Ut学号sno  （不超过4位）ttUn"); 
 printf("Ut姓名sname （不超过4个汉字）ttUn"); 
 printf("Ut成绩score （int型）tttUn"); 
 printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
          
 while (1) { 
  s = inputdata(); 
  if (!s) { 
   break; 
  } 
  r->next = s; 
  r = s; 
 } 
 r->next = NULL; 
 return L; 
} 
 
LinkList * createHeadList() 
{ 
 //链表头结点 
 LinkList * L = (LinkList *)malloc(sizeof(LinkList)); 
 //结点 
 LinkList * s = NULL; 
  
 printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
 printf("Utt头插法建立ttUn"); 
 printf("Ut请输入学生信息（当学号为"#"时结束）tUn"); 
 printf("UttttttUn"); 
 printf("Ut学号sno  （不超过4位）ttUn"); 
 printf("Ut姓名sname （不超过4个汉字）ttUn"); 
 printf("Ut成绩score （int型）tttUn"); 
 printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 while (1) { 
  s = inputdata(); 
  if (!s) { 
   break; 
  } 
  s->next = L->next; 
  L->next = s; 
 } 
 return L; 
} 
 
void getElem(LinkList * L,int i) 
{ 
 LinkList * p = L; 
 int j = 0; 
 while (p && j<i) { 
  p = p->next; 
  j++; 
 } 
 if (!p) { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtDon't find the student!tUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 } 
 else 
 { 
  display(p); 
 } 
} 
 
void locateElemBysno(LinkList * L,char ch[5]) 
{ 
 LinkList * p = L->next; 
 while (p && (0 != strcmp(p->data.sno,ch))) 
 { 
  p = p -> next; 
 } 
 if (!p) { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtDon't find the student!tUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 } 
 else 
 { 
  display(p); 
 } 
} 
void locateElemBysname(LinkList * L,char ch[9]) 
{ 
 LinkList * p = L->next; 
 while (p && (0 != strcmp(p->data.sname,ch))) 
 { 
  p = p -> next; 
 } 
 if (!p) { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtDon't find the student!tUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 } 
 else 
 { 
  display(p); 
 } 
} 
int lengthList(LinkList * L) 
{ 
 LinkList * p = L->next; 
 int j = 0; 
 while (p) { 
  p = p->next; 
  j ++; 
 } 
 return j; 
} 
void insertElem(LinkList * L,int i) 
{ 
 LinkList * s = inputdata(); 
 LinkList * p = L; 
 int j = 0; 
 while (p && j<i-1) 
 { 
  p = p->next; 
  j++; 
 } 
 if (p && p->next) 
 { 
  s->next = p->next; 
  p->next = s; 
 } 
 else 
 { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtDon't find the student!tUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 } 
 displayAll(L); 
 
} 
 
void insertElemBysno(LinkList * L,char ch[5]) 
{ 
 LinkList * p = L; 
 LinkList * s = NULL; 
  
 while (p && (0 != strcmp(p->data.sno,ch))) 
 { 
  p = p->next; 
 } 
 if (!p) { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtDon't find the student!tUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 } 
 else 
 { 
  s = inputdata(); 
  s->next = p->next; 
  p->next = s; 
 } 
} 
 
void deleteElem(LinkList * L,char ch[5]) 
{ 
 LinkList *p,*q; 
 p = L->next; 
 q=L; 
 while (p && (strcmp(p->data.sno,ch) != 0)) { 
  q = p; 
  p = p->next; 
 } 
 if (!p) { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtDon't find the student!tUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 } 
 else 
 { 
  display(p); 
  q->next = p->next; 
  free(p); 
 } 
} 
void insertSort(LinkList * L) 
{ 
 LinkList * L1; 
 LinkList * p; 
 LinkList * q; 
 LinkList * s; 
 int len; 
 len = lengthList(L); 
 L1 = (LinkList *)malloc(sizeof(LinkList)); 
 if (L->next) { 
  s = (LinkList *)malloc(sizeof(LinkList)); 
  strcpy(s->data.sno,L->data.sno); 
  strcpy(s->data.sname,L->data.sname); 
  s->data.score = L->data.score; 
  s->next = NULL; 
  L1->next = s; 
  q = L->next; 
 } 
 else 
 { 
  printf("qTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTrn"); 
  printf("UtThe student link list is empty!nUn"); 
  printf("tTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTsnn"); 
 
  return; 
 } 
 while (q) { 
  p = L1->next; 
  while (p &&(p->data.score >= q->data.score)) 
  { 
   p = p->next; 
  } 
  s = (LinkList *)malloc(sizeof(LinkList)); 
  strcpy(s->data.sno,q->data.sno); 
  strcpy(s->data.sname,q->data.sname); 
  s->data.score = q->data.score; 
  if (!p) { 
   s->next = NULL; 
   p->next = s; 
  } 
  else 
  { 
   s->next = p->next; 
   p->next = s; 
  } 
  q = q->next; 
 } 
 displayAll(L1); 
}