简单的学生信息管理系统

做这东西纯粹是无聊(花了一下午帮同学写的)，没啥营养。各个函数都注释好了，很容易看懂。

有些地方写的不太合适也懒得改了，凑合看吧

好了少废话直接贴代码。。。

PS：vs2013和codeblock都编译通过，vc6编译出一大堆错误(无视吧o(╯□╰)o)

主函数：

#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include"函数接口.h"int main(){Show_Menu();system("pause");return 0;}

接口函数：

#include<stdio.h>#include<stdlib.h>#include<string.h>#define M 3typedef struct student{char number[20];char name[20];int score[M];int sum;struct student *pNext;}Stu, *pStu;pStu Head = NULL; // 头结点pStu *Addr = NULL;// 指针数组保存每一个节点的地址// 函数位置不能放错了，否则编译要出问题!!!void Show_Menu();void Return_Home_Page();// 添加结点pStu Add_New_Node(char *name,char *number,int *score){int i,sum=0;pStu NewNode = (pStu)malloc(sizeof(Stu));strcpy(NewNode->name, name);strcpy(NewNode->number, number);for (i = 0; i < M; i++){NewNode->score[i] = score[i];sum += score[i];}NewNode->sum = sum;NewNode->pNext = NULL;return NewNode;}// 创建数据表void Create_Link_List(pStu *pHead, char *name, char *number, int *score){if (*pHead == NULL){*pHead = Add_New_Node(name, number, score);}else{pStu p = *pHead;while (p->pNext != NULL){p = p->pNext;}p->pNext = Add_New_Node(name, number, score);}}// 登记函数void Input_Stu_Data(void){int rs,i,j;char tmp_name[20] = { 0 };char tmp_number[20] = { 0 };int tmp_score[M] = { 0 };system("cls");printf("请输入需要输入几个学生信息: ");scanf("%d", &rs);for (i = 0; i < rs; i++){printf("请输入第%d个学生的学号: ", i + 1);scanf("%s", tmp_number);printf("请输入学生姓名: ");scanf("%s", tmp_name);for (j = 0; j < M; j++){printf("请输入第%d门课成绩: ",j + 1);scanf("%d", &tmp_score[j]);}Create_Link_List(&Head, tmp_name, tmp_number, tmp_score);printf("\n");}Return_Home_Page();}// 浏览函数void Look_Through_Stu_Data(pStu pHead){system("cls");if (pHead == NULL){printf("系统里没有任何学生的信息！\n");Return_Home_Page();}int i, k = 1;pStu p = pHead;while (p != NULL){printf("第%d个学生学号为：%s\n", k, p->number);printf("第%d个学生姓名为：%s\n", k, p->name);for (i = 0; i < M; i++){printf("第%d个学生的第%d门课的成绩:%d\n", k, i + 1, p->score[i]);}printf("第%d个学生的总成绩为：%d\n\n", k, p->sum);k++;p = p->pNext;}Return_Home_Page();}// 打印出找到的学生的数据void Print_One_Stu_Data(pStu p){printf("您所查找学生的信息为:\n");printf("----学号 -----姓名----英语成绩----高数成绩----计算机成绩----\n");printf("-----%s-------%s--------%d---------%d----------%d---------\n", p->number, p->name, p->score[0],p->score[1], p->score[2]);}// 获取表中节点的个数int Get_Count_Of_List(pStu pHead){if (pHead == NULL){printf("系统里没有任何学生的信息！\n");return 0;}int n = 0;pStu p = pHead;while (p != NULL){n++;p = p->pNext;}return n;}// 排序void Sort_List(pStu pHead){// 用指针数组的方式保存每个节点的地址，直接对地址所指向的// 值进行排序，避免直接对结构体排序，(数据反复拷贝太浪费时间了)system("cls");if (pHead == NULL){printf("表空无法排序\n");return;}int i, j = 0, n = Get_Count_Of_List(pHead);Addr = (pStu*)malloc(sizeof(pStu *)* n); // 动态分配数组(二级指针)pStu p = pHead;while (p != NULL){Addr[j++] = p;p = p->pNext;}for (i = 0; i < n - 1; i++){for (j = i + 1; j < n; j++){if (Addr[i]->sum < Addr[j]->sum){pStu temp = Addr[i];Addr[i] = Addr[j];Addr[j] = temp;}}}printf("按照总成绩排序后信息为:\n");printf("----学号----姓名----总成绩----\n");for (i = 0; i < n; i++){printf("-----%s-------%s-------%d-----\n", Addr[i]->number, Addr[i]->name, Addr[i]->sum);}// 用完了释放内存避免内存泄露free(Addr);Return_Home_Page();}// 通过学号查找pStu Search_Data_By_Number(pStu pHead,char *number,int *flag){if (pHead == NULL){return NULL;}pStu p = pHead;while (p != NULL){if (0 == strcmp(p->number, number)){*flag = 1;return p;}p = p->pNext;}return NULL;}// 通过姓名查找pStu Search_Data_By_Name(pStu pHead, char *name,int *flag){if (pHead == NULL){return NULL;}pStu p = pHead;while (p != NULL){if (0 == strcmp(p->name, name)){*flag = 1;return p;}p = p->pNext;}return NULL;}// 通过分数查找void Search_Data_By_Score(pStu pHead,int sum){int flag = 0;if (pHead == NULL){printf("学生数据为空无法查找\n");return ;}pStu p = pHead;while (p != NULL){if (p->sum == sum){flag = 1;Print_One_Stu_Data(p);}p = p->pNext;}if (!flag)printf("不好意思找遍了,没找着\n");}// 删除一个数据int Delete_One_Data(pStu *pHead, char *number){int flag = 0;if (*pHead == NULL){return 0;}pStu p = *pHead;if (0 == strcmp(p->number, number)){*pHead = p->pNext;free(p);return 1;}else{while (p->pNext!=NULL){if (0 == strcmp(p->pNext->number, number)){flag = 1;break;}p = p->pNext;}if (flag){pStu p1 = p->pNext->pNext;pStu temp = p->pNext;p->pNext = p1;free(temp);return 1;}}return 0;}// 删除所有数据int Free_All_List(pStu *pHead){if (*pHead == NULL){return 0;}pStu p = *pHead,p1=NULL;p1 = p->pNext;while (p1!=NULL){p = p1;p1 = p1->pNext;free(p);}free(*pHead);*pHead = NULL;return 1;}// 删除函数void Delete_Stu_Data(){char Delete_Info[20] = { 0 };system("cls");printf("删除全部学生信息请输入\"all\"，删除指定学号的学生信息请输入\"one\"\n");scanf("%s", Delete_Info);if (0 == strcmp(Delete_Info, "all")){if (Free_All_List(&Head))printf("删除成功！\n");elseprintf("删除失败\n");}else if (0 == strcmp(Delete_Info, "one")){char buffer[20] = { 0 };printf("请输入你要删除的人的学号:");scanf("%s", buffer);if (Delete_One_Data(&Head, buffer))printf("删除成功！\n");elseprintf("输入数据有误删除失败！\n");}else{printf("输入的数据有误！\n");Delete_Stu_Data();}Return_Home_Page();}// 保存文件void Save_Data(pStu pHead){if (pHead == NULL){printf("空表，无法写入到文件!\n");Return_Home_Page();}FILE *pfr = fopen("card.dat", "wb");if (pfr == NULL){printf("not open!\n");exit(0);}// 排序存盘int i,j=0,n = Get_Count_Of_List(pHead);Addr = (pStu*)malloc(sizeof(pStu *)* n); // 动态分配数组(二级指针)pStu p = pHead;while (p != NULL){Addr[j++] = p;p = p->pNext;}for (i = 0; i < n - 1; i++){for (j = i + 1; j < n; j++){if (Addr[i]->sum < Addr[j]->sum){pStu temp = Addr[i];Addr[i] = Addr[j];Addr[j] = temp;}}}for (i = 0; i < n; i++){fprintf(pfr, "%s %s", Addr[i]->number, Addr[i]->name);for (j = 0; j < M; j++)fprintf(pfr, " %d", Addr[i]->score[j]);fprintf(pfr, "\r\n");}if (ferror(pfr)){fclose(pfr);printf("写文件失败！\n");return;}printf("写文件成功！\n");fclose(pfr);free(Addr);Return_Home_Page();}// 从文件中读取(导出文件)void Export_Data(pStu *pHead){int i;FILE *pfr = fopen("card.dat", "rb");if (pfr == NULL){printf("not open!\n");exit(0);}while (!feof(pfr)){pStu temp = (pStu)malloc(sizeof(Stu));memset(temp, 0, sizeof(temp));fscanf(pfr, "%s%s%d%d%d", temp->number, temp->name, &(temp->score[0]),&(temp->score[1]), &(temp->score[2]));int buffer[M] = { 0 };for (i = 0; i < M; i++)buffer[i] = temp->score[i];if (feof(pfr)) // 读取结束跳出循环break;Create_Link_List(&(*pHead),temp->name ,temp->number , buffer);}printf("文件打开成功！\n");fclose(pfr);Return_Home_Page();}// 显示菜单void Show_Menu(){int i,n,flag,n1=0,sum=0;pStu temp = NULL;char buffer[20], tp[20];const char *table[] = { "学号", "姓名", "成绩" };system("cls");printf("学生信息管理系统\n");printf("作者:(GadyPu)\n");printf("--------------------Menu-------------------------\n");printf("1.登记学生信息\n");printf("2.删除学生信息\n");printf("3.浏览所有已登记的学生\n");printf("4.查找\n");printf("4.1按学号查找\n");printf("4.2按姓名查找\n");printf("4.3按成绩查找\n");printf("5.根据总成绩排序\n");printf("6.存储到文件\n");printf("7.从文件导出\n");printf("8.退出系统\n");Sign:printf(" 请选择 ");scanf("%d", &n);switch (n){case 1:Input_Stu_Data();break;case 2:Delete_Stu_Data();break;case 3:Look_Through_Stu_Data(Head);break;case 4:printf("三种查找方式：学号，姓名，成绩，请输入查找方式:");scanf("%s", tp);for (i = 0; i < sizeof(table) / sizeof(table[0]); i++){if (0 == strcmp(tp, table[i])){n1 = i + 1;break;}}switch (n1){case 1:flag = 0;memset(buffer, 0, sizeof(buffer));printf("请输入需要查找学生的学号:");scanf("%s", buffer);temp = Search_Data_By_Number(Head, buffer, &flag);if (0 == flag )printf("查无此数据！\n");elsePrint_One_Stu_Data(temp);Return_Home_Page();break;case 2:flag = 0;memset(buffer, 0, sizeof(buffer));printf("请输入需要查找学生的姓名:");scanf("%s", buffer);temp=Search_Data_By_Name(Head,buffer,&flag);if (0 == flag )printf("查无此数据！\n");elsePrint_One_Stu_Data(temp);Return_Home_Page();break;case 3:printf("按成绩查找,请输入成绩:");scanf("%d", &sum);Search_Data_By_Score(Head,sum);Return_Home_Page();break;default:{   printf("你输入的有误,请重新输入\n");   Return_Home_Page();}}break;case 5:Sort_List(Head);break;case 6:Save_Data(Head);break;case 7:Export_Data(&Head);break;case 8:exit(0);break;default:{   printf("请输入1-8直接的数字，谢谢！\n");   goto Sign;}}}void Return_Home_Page(){char sign[20] = { 0 };printf("\n");printf("还需要操作么？如果需要请输入：yes，否则输入：no\n");scanf("%s", sign);if (0 == strcmp(sign, "yes")){Show_Menu();}else if (0 == strcmp(sign, "no")){exit(0);}else{printf("请输入正确的字符，谢谢\n");// 递归调用Return_Home_Page();}}