C语言学生信息管理系统（动态链表版） C

大一上学期的期末作业，只记得当时弄了好长时间。在写代码的过程中，能发现很多问题，错误，折磨人的很。不过也确实学到了好多东西。这其中，有王瑶哥和菲菲姐的热心帮助。在此谢谢他们喽～
当然，现在看来，代码还有很多可以优化的地方。本程序功能还算齐全，BUG还有待发现，没有包含输入检测机制。精力有限，后悔当年没有养成写注释的习惯，现在放在那里自己都不愿意看了，=_=!等以后有机会用C++再写个吧。
图样：

【C语言学生信息管理系统（动态链表版）】 代码：

/* * C语言学生信息管理系统（动态链表版） * 作者：odaynot * 时间：2011年 * 功能：增添新键数据、修改删除数据、查询统计数据 * 平台：windows */ #include #include #include #include # define LEN sizeof(struct Student)struct Student { char num[10]; /*学号*/ char name[20]; /*姓名*/ char sex[10]; /*性别*/ int age; /*年龄*/ char phone[12]; /*电话*/ char qq[12]; /*QQ号*/ float cscore; /*C语言成绩*/ float escore; /*英语成绩*/ struct Student *next; }; char filename[30]; //全局变量，用来保存要打开的文件名字/*生成链表*/ struct Student *Creat(int n) { void menu_print_in(void); struct Student *head; struct Student *p1, *p2; system("cls"); for(int i=1; inum,p1->name,p1->sex, &p1->age,p1->phone,p1->qq,&p1->cscore,&p1->escore); p1->next = NULL; if(i==1) { head = p2 = p1; } else { p2->next = p1; p2 = p1; } } return(head); }/*数据存盘(wb只写)*/ void WriteData_wb(struct Student *head) { FILE *fp; struct Student *p; if((fp = fopen(filename, "wb"))==NULL) printf("\a error! Can not open the file!"); p = head; while(p!=NULL) { if(fwrite(p,LEN,1,fp)!=1) { printf("写入数据出错\n"); fclose(fp); return; } p=p->next; } fclose(fp); }/*数据存盘(ab追加)*/ void WriteData_ab(struct Student *head) { FILE *fp; struct Student *p; if((fp = fopen(filename, "ab"))==NULL) printf("\a error! Can not open the file!"); p = head; while(p!=NULL) { if(fwrite(p,LEN,1,fp)!=1) { printf("写入数据出错\n"); fclose(fp); return; } p=p->next; } fclose(fp); }/*读取数据*/ /*读取数据文件保存到链表中，返回指向此链表头指针*/ struct Student *ReadData(void) { struct Student *head = NULL; struct Student *p1, *p2; //s = p1; p = p2; FILE *fp; if((fp=fopen(filename,"rb+"))==NULL) { printf("打开文件出错\n"); exit(0); } while(!feof(fp)) { if((p1=(struct Student*)malloc(LEN))==NULL){ printf("内存申请出错\n"); fclose(fp); exit(0); } if(fread(p1,LEN,1,fp)!=1){ free(p1); break; } if(head==NULL) head=p2=p1; else{ p2->next=p1; p2=p1; } } fclose(fp); return (head); }/*【1】全量查询*/ void Print_inquire_all(void) { void menu_print_out(void); struct Student *pt; pt = ReadData(); menu_print_out(); do { printf("%-10s%6s%8s%4d%13s%11s%4.1f %4.1f %4.1f %4.1f\n", pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore, pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore); pt = pt->next; }while(pt!=NULL); printf("\n\n"); }/*【2】学号查询*/ int Print_inquire_num() { void menu_print_out(void); struct Student *pt; char str_num[10]; printf("◎请输入您要查询的学号:"); scanf("%s", str_num); pt = ReadData(); menu_print_out(); do { if(strcmp(pt->num,str_num)==0) { printf("%-10s%6s%8s%4d%13s%11s%4.1f %4.1f %4.1f %4.1f\n", pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore, pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore); printf("\n\n"); return 0; } pt = pt->next; }while(pt!=NULL); printf("数据库中没有存储您要查询的数据！\n"); printf("\n\n"); return 0; }/*【3】姓名查询*/ int Print_inquire_name() { void menu_print_out(void); struct Student *pt; char str_name[20]; printf("◎请输入您要查询的姓名:"); scanf("%s", str_name); pt = ReadData(); menu_print_out(); do { if(strcmp(pt->name,str_name)==0) { printf("%-10s%6s%8s%4d%13s%11s%4.1f %4.1f %4.1f %4.1f\n", pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore, pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore); printf("\n\n"); return 0; } pt = pt->next; }while(pt!=NULL); printf("数据库中没有存储您要查询的数据！\n"); printf("\n\n"); return 0; }/*【4】模糊查询*/ int Print_inquire_fuzzy(void) { void menu_print_out(void); struct Student *pt; char str_find[20]; int m = 0; printf("◎请输入您要查询的关键词:"); scanf("%s", str_find); pt = ReadData(); menu_print_out(); do { if(strstr(pt->num,str_find)!=0||strstr(pt->name,str_find)!=0 ||strstr(pt->sex,str_find)!=0||strstr(pt->phone,str_find)!=0 ||strstr(pt->qq,str_find)!=0) { printf("%-10s%6s%8s%4d%13s%11s%4.1f %4.1f %4.1f %4.1f\n", pt->num,pt->name,pt->sex,pt->age,pt->phone,pt->qq,pt->cscore, pt->escore,(pt->cscore+pt->escore)/2,pt->cscore+pt->escore); m = 1; } pt = pt->next; }while(pt!=NULL); if(!m) printf("数据库中没有存储您要查询的数据！\n"); printf("\n\n"); return 0; }/*成绩统计*/ int Print_inquire_stats(void) { struct Student *head, *p1; float CMIN, CMAX, EMIN, EMAX, SMIN, SMAX; head = ReadData(); p1 = head; CMIN = CMAX = p1->cscore; EMIN = EMAX = p1->escore; SMIN = SMAX = p1->cscore + p1->escore; while(p1->next!=NULL) { if(p1->cscore > CMAX) { CMAX = p1->cscore; } if(p1->cscore < CMIN) { CMIN = p1->cscore; } if(p1->escore > EMAX) { EMAX = p1->escore; } if(p1->escore < EMIN) { EMIN = p1->escore; } if((p1->cscore + p1->escore) > SMAX) { SMAX = (p1->cscore + p1->escore); } if((p1->cscore + p1->escore) < SMIN) { SMIN = (p1->cscore + p1->escore); } p1 = p1->next; } printf("\n"); printf("◎数据库中C语言最高分为:%4.1f \n", CMAX); printf("◎数据库中C语言最低分为:%4.1f \n\n", CMIN); printf("◎数据库中英语最高分为:%4.1f \n", EMAX); printf("◎数据库中英语最低分为:%4.1f \n\n", EMIN); printf("◎数据库中总成绩最高分为:%4.1f \n", SMAX); printf("◎数据库中总成绩最低分为:%4.1f \n\n", SMIN); printf("\n"); printf("【PS:更多统计功能更在开发中,敬请期待O(∩_∩)O】\n\n"); return 0; }/*【1】修改数据之删除记录*/ int Delete() { struct Student *pt1, *pt2, *head; char str_num[20]; printf("\n◎请输入您要删除的学号信息:"); scanf("%s", str_num); pt1 = ReadData(); pt2 = pt1->next; head = pt1; while(pt2!=NULL) { if(strcmp(pt1->num,str_num)==0) { WriteData_wb(pt2); } else if(strcmp(pt2->num,str_num)==0) { pt1->next = pt2->next; WriteData_wb(head); } pt2 = pt2->next; pt1 = pt1->next; } if(pt2!=NULL) printf("数据库中没有存储您要删除的数据！\n"); printf("\n\n"); return 0; }/*【2】修改数据之修改记录*/ int Amend() { void menu_print_in(void); struct Student *pt1, *pt2, *head; char str_num[20]; printf("◎请输入您要修改的学号信息:"); scanf("%s", str_num); pt1 = ReadData(); pt2 = pt1->next; head = pt1; while(pt2!=NULL) { if(strcmp(pt1->num,str_num)==0) { menu_print_in(); scanf("%s%s%s%d%s%s%f%f",pt1->num,pt1->name,pt1->sex, &pt1->age,pt1->phone,pt1->qq,&pt1->cscore,&pt1->escore); WriteData_wb(head); } else if(strcmp(pt2->num,str_num)==0) { menu_print_in(); scanf("%s%s%s%d%s%s%f%f",pt2->num,pt2->name,pt2->sex, &pt2->age,pt2->phone,pt2->qq,&pt2->cscore,&pt2->escore); WriteData_wb(head); } pt2 = pt2->next; pt1 = pt1->next; } if(pt2!=NULL) printf("数据库中没有存储您要删除的数据！\n"); return 0; }/*【3】修改数据之整理数据*/ int Neaten() { struct Student *first; struct Student *tail; struct Student *p_min; struct Student *min; struct Student *p; struct Student *head; head = ReadData(); first = NULL; while(head!=NULL) { for(p=head,min=head; p->next!=NULL; p=p->next) { if(strcmp(p->next->num,min->num)<0) { p_min = p; min = p->next; } } if(first==NULL) { first = min; tail = min; } else { tail->next = min; tail = min; } if(min==head) { head = head->next; } else { p_min->next = min->next; } } if(first!=NULL) { tail->next = NULL; } head = first; WriteData_wb(head); return 0; }/*输入写入数据的数量*/ int Creat_num(void) { printf("\n◎请输入您此次要添加的数据个数:"); int n; if(scanf("%d", &n)!=1) { printf("\a error!"); } return n; }/*选择将要打开的文件*/ int File_name() { printf("\n◎请输入您想要打开的文件:"); if(scanf("%s", filename)!=1) printf("\a error!"); return 0; }/*主菜单*/ void menu(void) { void menu_add(void); void menu_inquire(void); void menu_amend(void); printf("╭════════╮\n"); printf("╭══════╣学生管理系统V1.0╠══════╮\n"); printf("║╰════════╯║\n"); printf("║【1】添加数据【3】修改数据║\n"); printf("║║\n"); printf("║【2】查询数据【4】退出系统║\n"); printf("║║\n"); printf("╰══════════════════════╯\n"); printf("◎请输入功能前的序号进入相应的工具:【】\b\b"); int a = 0; a = getchar(); while(a!='1'&&a!='2'&&a!='3'&&a!='4') { printf("error! please input the right number!\n"); putchar('\a'); getchar(); printf("◎请重新输入功能前的序号进入相应的工具:【】\b\b"); a = getchar(); } switch(a) { case '1': File_name(); menu_add(); break; case '2': File_name(); menu_inquire(); break; case '3': File_name(); menu_amend(); break; case '4': exit(0); break; } getchar(); }/*二级菜单之添加数据*/ void menu_add(void) { system("cls"); getchar(); printf("╭════════╮\n"); printf("╭══════╣添加数据方式╠══════╮\n"); printf("║╰════════╯║\n"); printf("║ 【1】新建文件【2】增添数据【3】返回菜单║\n"); printf("║║\n"); printf("╰══════════════════════╯\n"); printf("◎请输入功能前的序号进入相应的工具:【】\b\b"); int a = 0; a = getchar(); while(a!='1'&&a!='2'&&a!='3') { printf("error! please input the right number!\n"); putchar('\a'); getchar(); printf("◎请重新输入功能前的序号进入相应的工具:【】\b\b"); a = getchar(); } switch(a) { case '1': WriteData_wb(Creat(Creat_num())); printf("\n◎新建文件成功且数据已成功保存◎\n"); system("pause"); system("cls"); menu_add(); break; case '2': WriteData_ab(Creat(Creat_num())); printf("\n◎数据已成功添加◎\n"); system("pause"); system("cls"); menu_add(); break; case '3': system("cls"); getchar(); menu(); break; } }/*二级菜单之查询数据*/ void menu_inquire(void) { system("cls"); getchar(); while(1) { system("cls"); printf("╭════════╮\n"); printf("╭══════╣查询数据方式╠══════╮\n"); printf("║╰════════╯║\n"); printf("║【1】全量查询【4】模糊查询║\n"); printf("║║\n"); printf("║【2】学号查询【5】成绩统计║\n"); printf("║║\n"); printf("║【3】姓名查询【6】返回菜单║\n"); printf("╰══════════════════════╯\n"); printf("◎请输入功能前的序号进入相应的工具:【】\b\b"); int a = 0; a = getchar(); while(a!='1'&&a!='2'&&a!='3'&&a!='3'&&a!='4'&&a!='5'&&a!='6') { printf("error! please input the right number!\n"); putchar('\a'); getchar(); printf("◎请重新输入功能前的序号进入相应的工具:【】\b\b"); a = getchar(); } switch(a) { case '1': Print_inquire_all(); system("pause"); getchar(); break; case '2': Print_inquire_num(); system("pause"); getchar(); break; case '3': Print_inquire_name(); system("pause"); getchar(); break; case '4': Print_inquire_fuzzy(); system("pause"); getchar(); ; break; case '5': Print_inquire_stats(); system("pause"); getchar(); break; case '6': system("cls"); getchar(); menu(); break; } } }/*二级菜单之修改数据*/ void menu_amend(void) { system("cls"); getchar(); while(1) { system("cls"); printf("╭════════╮\n"); printf("╭══════╣修改数据方式╠══════╮\n"); printf("║╰════════╯║\n"); printf("║【1】删除记录【3】整理数据║\n"); printf("║║\n"); printf("║【2】修改记录【4】返回菜单║\n"); printf("╰══════════════════════╯\n"); printf("◎请输入功能前的序号进入相应的工具:【】\b\b"); int a = 0; a = getchar(); while(a!='1'&&a!='2'&&a!='3'&&a!='4') { printf("error! please input the right number!\n"); putchar('\a'); getchar(); printf("◎请重新输入功能前的序号进入相应的工具:【】\b\b"); a = getchar(); } switch(a) { case '1': Delete(); printf("\n\n◎已成功删除指定数据◎\n"); system("pause"); getchar(); break; case '2': Amend(); printf("\n\n◎已成功修改指定数据◎\n"); system("pause"); getchar(); break; case '3': Neaten(); printf("\n\n◎数据已成功按照学号重新排列◎\n"); system("pause"); getchar(); break; case '4': system("cls"); getchar(); menu(); break; } } }/*输入输出提示栏*/ void menu_print_in(void) { printf("------------------------------------------------------------------------\n"); printf("学号姓名性别年龄电话QQCE\n"); printf("------------------------------------------------------------------------\n"); } void menu_print_out(void) { printf("--------------------------------------------------------------------------\n"); printf("学号姓名性别年龄电话QQCEAS\n"); printf("--------------------------------------------------------------------------\n"); }/*主函数*/ int main(void) { SetConsoleTitle(L"C++学生信息管理系统"); menu(); return 0; }

转载来自：http://blog.csdn.net/odaynot/article/details/7942497?ABstrategy=codes_snippets_optimize_v4