(资料图片仅供参考)

1、/*好吧，其实你可以上网看看，那么多的,你可以自己修改下*/#include #include #include #include #define NULL 0#define LEN sizeof(struct student)struct student { char name[20]; long int num; char sex[4]; int age; char address[30]; double tele_num; char aihao[20]; struct student *next;};//定义一个结构题int TOTAL_NUM = 0;//学生总数struct student *head = NULL;void welcome (); //欢迎界面void mainmenu (); //主界面void record (); //记录数据void insert(struct student *stu); //插入数据void display(struct student *stu); //显示一个学生的信息void displayAll (); //显示所有学生的信息void query_by_num (); //按学号查询学生信息void readData (); //读取文件里学生的信息void writeData (); //向文件写入学生信息void freeAll (); //清空链表内容void del (); //删除学生信息void change (); //更改学生信息void devise (struct student *p); //选择更改内容int main (void){ welcome (); //显示主菜单 mainmenu (); return 0;}//显示欢迎信息void welcome (){ printf ("+----------------------------------------------------+"); printf ("| |"); printf ("| 欢迎使用网络工程学院信息安全092班学生信息管理系统 |"); printf ("| |"); printf ("+----------------------------------------------------+");}//系统主菜单void mainmenu (){ int choice; choice = -1; readData (); printf ("温馨提示：为保证您的操作得到保存。

2、请按正常顺序退出系统^_^"); do { printf (""); printf ("--------------------------------------------"); printf ("+ 信息安全092班学生信息管理系统 |"); printf ("--------------------------------------------"); printf ("+ [1]----录入学生信息 |"); printf ("+ [2]----浏览学生信息 |"); printf ("+ [3]----查询学生信息 |"); printf ("+ [4]----删除学生信息 |"); printf ("+ [5]----修改学生信息 |"); printf ("+ [0]----退出系统 |"); printf ("+*·*·*·*·*·*·*·*·*·*·*·*·*·*·*|"); printf ("--------------------------------------------"); printf ("请输入您的选择："); scanf ("%d", &choice); switch (choice) { case 0: writeData (); freeAll (); exit (0); case 1: record (); break; case 2: displayAll (); break; case 3: query_by_num (); break; case 4: del (); break; case 5: change (); break; default: printf ("无效选项!"); break; } } while (choice != 0);}//录入学生信息void record (){ struct student *p0; p0 = (struct student *)malloc(LEN); printf ("请输入学生的姓名:"); scanf ("%s",p0->name); printf ("请输入学生的学号:"); scanf ("%ld",&p0->num); printf ("请输入学生的性别:"); scanf ("%s",p0->sex); printf ("请输入学生的年龄:"); scanf ("%d",&p0->age); printf ("请输入学生的地址:"); scanf ("%s",p0->address); printf ("请输入学生的电话:"); scanf ("%lf",&p0->tele_num); printf ("请输入学生的爱好:"); scanf ("%s",p0->aihao); insert (p0); printf ("该学生的信息为:"); printf ("-------------------------------------------------------------------------------"); printf ("姓名学号年龄性别地址电话爱好"); display (p0);}void insert (struct student *stu){ struct student *p0, *p1, *p2; p1 = head; p0 = stu; if (head == NULL) { head = p0; p0->next = NULL; } else { while ((p0->num > p1->num)&&(p1->next != NULL)) { p2 = p1; p1 = p1->next; } if (p0->num <= p1->num) { if (head == p1) head = p0; else p2->next = p0; p0->next = p1; } else { p1->next = p0; p0->next = NULL; } } TOTAL_NUM++;}void display (struct student *p){ printf ("%s%ld%d%s%s%.0f%s", p->name, p->num, p->age, p->sex, p->address, p->tele_num, p->aihao);}//浏览学生信息void displayAll(){ struct student *p; printf("学生总数:%d", TOTAL_NUM); p = head; if (head != NULL) { printf("姓名学号年龄性别地址电话爱好"); printf("-------------------------------------------------------------------------------"); do { display(p); p = p->next; } while(p != NULL); } printf ("");}//按学号查询学生信息void query_by_num (){ int num; struct student *p1; printf("请输入学生的学号："); scanf("%ld", &num); if(head==NULL) { printf("无学生记录！"); return; } p1 = head; while (num!=p1->num && p1->next!=NULL) p1 = p1->next; if (num == p1->num) { printf ("姓名学号年龄性别地址电话爱好"); printf ("-------------------------------------------------------------------------------"); display (p1); } else printf ("没有该学生记录，请核对！");}//写入文件void writeData (){ FILE* fp;//文件指针 struct student *p; fp = fopen("1.txt", "w"); if (!fp) { printf("文件打开错误！"); return; } fprintf(fp,"%d", TOTAL_NUM); for(p = head; p!= NULL; p= p->next) { fprintf(fp,"%s%ld%s%d%s%.0f%s", p->name, p->num, p->sex, p->age, p->address, p->tele_num, p->aihao); } fclose (fp); }void freeAll (){ struct student *p1, *p2; p1 = p2=head; while(p1) { p2=p1->next; free (p1); p1 = p2; } }//读取文件void readData (){ FILE* fp;//文件指针 struct student *p1, *p2; fp = fopen("1.txt", "r"); if (!fp) { printf("文件打开错误！"); return; } fscanf(fp,"%d", &TOTAL_NUM); head = p1 = p2 = (struct student *)malloc(LEN); fscanf(fp,"%s%ld%s%d%s%lf%s", p1->name, &p1->num, p1->sex, &p1->age, p1->address, &p1->tele_num, p1->aihao); while(!feof(fp)) { p1 = (struct student *)malloc(LEN); fscanf(fp,"%s%ld%s%d%s%lf%s", p1->name, &p1->num, p1->sex, &p1->age, p1->address, &p1->tele_num, p1->aihao); p2->next = p1; p2 = p1; } p2->next = NULL; fclose(fp);}//删除学生信息void del (){ struct student *p1, *p2; long int num; if (head == NULL) { printf("无学生记录！"); return; } printf("请输入您要删除的学生的学号："); scanf("%ld", &num); p1 = head; while (num != p1->num && p1->next != NULL) { p2 = p1; p1 = p1->next; } if(num == p1->num) { if(p1 == head) head = p1->next; else p2->next = p1->next; free(p1); TOTAL_NUM--; } else printf("没有该学生记录，请核对！");}//修改学生信息void change (){ struct student *p1, *p2; long int num; if (head == NULL) { printf ("无学生记录！"); return; } printf ("请输入您要修改的学生的学号："); scanf ("%ld", &num); p1 = head; while (num != p1->num && p1->next != NULL) { p2 = p1; p1 = p1->next; } if(num == p1->num) devise (p1); else printf("没有该学生记录。

3、请核对！");}void devise (struct student *p){ int choice; choice = -1; do { printf("请选择您要修改的学生的信息内容："); printf("+----------------------+"); printf("| 姓名 请按 1 |"); printf("| 学号 请按 2 |"); printf("| 性别 请按 3 |"); printf("| 年龄 请按 4 |"); printf("| 地址 请按 5 |"); printf("| 电话 请按 6 |"); printf("| 爱好 请按 7 |"); printf("| 取消 请按 0 |"); printf("+----------------------+"); printf("请输入您的选择："); scanf("%d", &choice); switch (choice) { case 0: return; case 1: printf("请输入新姓名："); scanf("%s", p->name); break; case 2: printf("请输入新学号："); scanf("%d", &p->num); break; case 3: printf("请输入新性别："); scanf("%s", p->sex); break; case 4: printf("请输入新年龄："); scanf("%s", &p->age); break; case 5: printf("请输入新地址："); scanf("%s", p->address); break; case 6: printf("请输入新电话："); scanf("%lf", &p->tele_num); break; case 7: printf("请输入新爱好："); scanf("%s", p->aihao); break; default: printf("无效选项!"); break; } } while(choice != 0);}打字不易，如满意，望采纳。

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