C语言实现的成绩管理系统

#define NULL 0 #define STUDENT struct student #define TEACHER struct teacher #define LENSTU sizeof(struct student) #define LENTH sizeof(struct teacher) #include <stdio.h> TEACHER { int tno; char tname[20]; char cname[20]; char dept[20]; TEACHER *next; }; struct course { char tname[20]; char cname[20]; int score; }; STUDENT /*用动态链表实现学生信息的存储，定义链表接点*/ { int sno; char sname[20]; int age; char sex[10]; char dept[20]; struct course cs[3]; STUDENT *next; }; /*界面初始化，菜单函数*/ int menuselect() { char str[10]; clrscr(); printf("\n\n\n\n********************************************************************************\n"); printf(" 学生成绩管理系统\n"); printf("*************************************菜单***************************************\n"); printf("\t\t\t 1. 学生管理\n"); printf("\t\t\t 2. 授课管理\n"); printf("\t\t\t 3. 退出系统\n"); printf("\n\t\t 作者：陈华 \n"); printf("********************************************************************************\n"); do{ printf("\n\t\t\t请选择(1~3):"); scanf("%s",str); }while(strcmp(str,"1")!=0&&strcmp(str,"2")!=0&&strcmp(str,"3")!=0); /*菜单选择*/ if(strcmp(str,"1")==0) return 1; else if (strcmp(str,"2")==0) return 2; else if (strcmp(str,"3")==0) return 3; } /*二级菜单学生界面*/ int stumenu() { char str[10]; clrscr(); /*清屏*/ printf("********************************************************************************\n"); printf(" 学生管理\n"); printf("*************************************菜单***************************************\n"); printf("\t\t\t1. 学生信息录入\n"); printf("\t\t\t2. 查询学生信息\n"); printf("\t\t\t3. 学生成绩录入\n"); printf("\t\t\t4. 成绩查询\n"); printf("\t\t\t5. 删除学生信息\n"); printf("\t\t\t6. 排序\n"); printf("\t\t\t7. 保存\n"); printf("\t\t\t8. 打开\n"); printf("\t\t\t9. 返回上一菜单\n"); printf("********************************************************************************\n"); do{ printf("\n\t\t\t请选择(1~9):"); scanf("%s",str); }while(strcmp(str,"1")!=0&&strcmp(str,"2")!=0&&strcmp(str,"3")!=0&&strcmp(str,"4")!=0&&strcmp(str,"5")!=0&&strcmp(str,"6")!=0&&strcmp(str,"7")!=0&&strcmp(str,"8")!=0&&strcmp(str,"9")!=0); /*菜单选择*/ if(strcmp(str,"1")==0) return 1; else if (strcmp(str,"2")==0) return 2; else if (strcmp(str,"3")==0) return 3; else if (strcmp(str,"4")==0) return 4; else if (strcmp(str,"5")==0) return 5; else if (strcmp(str,"6")==0) return 6; else if (strcmp(str,"7")==0) return 7; else if (strcmp(str,"8")==0) return 8; else if (strcmp(str,"9")==0) return 9; } /*二级授课信息界面*/ int thmenu() { char str[10]; clrscr(); /*清屏*/ printf("********************************************************************************\n"); printf(" 教师管理\n"); printf("*************************************菜单***************************************\n"); printf("\t\t\t1. 授课信息录入\n"); printf("\t\t\t2. 打印授课信息\n"); printf("\t\t\t3. 删除授课信息\n"); printf("\t\t\t4. 保存\n"); printf("\t\t\t5. 打开\n"); printf("\t\t\t6. 返回上一菜单\n"); printf("********************************************************************************\n"); do{ printf("\n\t\t\t请选择(1~6):"); scanf("%s",str); }while(strcmp(str,"1")!=0&&strcmp(str,"2")!=0&&strcmp(str,"3")!=0&&strcmp(str,"4")!=0&&strcmp(str,"5")!=0&&strcmp(str,"6")!=0); /*菜单选择*/ if(strcmp(str,"1")==0) return 1; else if (strcmp(str,"2")==0) return 2; else if (strcmp(str,"3")==0) return 3; else if (strcmp(str,"4")==0) return 4; else if (strcmp(str,"5")==0) return 5; else if (strcmp(str,"6")==0) return 6; } /*录入*/ /*学生信息录入*/ STUDENT *enterstu(STUDENT *h) { int i,sno; char s[20]; STUDENT *p,*q; clrscr(); for(;;) { p=(STUDENT *)malloc(LENSTU); if(p==NULL) return NULL; printf("输入学号(遇到 0 结束输入):"); while(scanf("%d",&sno)==0) { printf(" 学号错误！\n输入学号(遇到 0 结束输入):"); scanf("%d",&sno); scanf("%s",s); } if(sno==0) break; /*如果学号为0则结束输入，否则继续录入*/ q=h; while(q) { if(q->sno==sno){printf("学号为%d的学生已经存在，请重新输入！\n",sno);free(p);break;} q=q->next; } if(!q) { p->sno=sno; printf("输入姓名:");scanf("%s",p->sname); printf("输入年龄:"); while(scanf("%d",&p->age)==0) { printf(" 年龄错误！\n输入年龄:"); scanf("%d",&p->age); scanf("%s",s); } printf("输入性别:");scanf("%s",p->sex); printf("输入部门:");scanf("%s",p->dept); for(i=0;i<3;i++) /*对成绩的初始化为0*/ { strcpy((*p).cs[i].tname," "); strcpy((*p).cs[i].cname," "); (*p).cs[i].score=0; } p->next=h; /*为了方便插入操作，将头结点做为新输入结点的后继结点*/ h=p; /*新输入结点为新的头结点*/ } } return(h); } /*授课信息录入*/ TEACHER *enterth(TEACHER *h) { int tno; char s[20]; TEACHER *p,*q; clrscr(); for(;;) { p=(TEACHER *)malloc(LENTH); if(p==NULL) return NULL; printf("输入教师职工号(遇到 0 结束输入): "); while(scanf("%d",&tno)==0) { printf("输入错误！"); printf("输入教师职工号(遇到 0 结束输入): "); scanf("%d",&tno); scanf("%s",s); } if(tno==0) break; /*如果教师号为0则结束输入，否则继续录入*/ q=h; while(q) { if(q->tno==tno){printf("教师号为%d的教师已经存在，请重新输入！\n",tno);free(p);break;} q=q->next; } if(!q) { p->tno=tno; printf("输入教师名:");scanf("%s",p->tname); printf("输入课程名:");scanf("%s",p->cname); printf("输入部门:"); scanf("%s",p->dept); p->next=h; /*为了方便插入操作，将头结点做为新输入结点的后继结点*/ h=p; /*新输入结点为新的头结点*/ } } return(h); } /*学生信息查询*/ void querystu(STUDENT *h) { int i,n,sno,count; char s[20],sname[20],dept[20]; char str[10]; STUDENT *p; clrscr(); do { printf("查询条件(遇到 0 结束输入):\n（ 打印学生信息：1 学号查询输入：2 姓名查询输入：3 系别查询：4 ）"); scanf("%s",str); if(strcmp(str,"0")==0) break; }while( strcmp(str,"1")!=0 && strcmp(str,"2")!=0 && strcmp(str,"3")!=0 && strcmp(str,"4")!=0 ); if(strcmp(str,"1")==0) n=1; else if (strcmp(str,"2")==0) n=2; else if (strcmp(str,"3")==0) n=3; else if (strcmp(str,"4")==0) n=4; switch(n) { case 1: p=h; printf("学号 姓名 年龄 性别 部门 :\n"); while(p!=NULL) /*链表的遍历*/ { { printf(" %d",p->sno); printf(" %s",p->sname); printf(" %d",p->age); printf(" %s",p->sex); printf(" %s",p->dept); printf("\n"); } p=p->next; } getch(); break; case 2: for(;;) { printf("输入学号(遇到 0 结束输入):"); while(scanf("%d",&sno)==0) { printf(" 学号错误！\n输入学号(遇到 0 结束输入):"); scanf("%d",&sno); scanf("%s",s); } if(sno==0) break; p=h;