企业建站套餐,h5网站开发培训哪里好,阿里巴巴网站建设目标,怎么把网站放到服务器上https://blog.csdn.net/yanxiaolx/article/details/53393437题目#xff1a;用c模拟实现一个学生成绩的信息管理系统#xff0c;要求能添加、删除、修改、查看和保存学生的信息等功能
源代码如下:[cpp] view plaincopy#define _CRT_SECURE_NO_WARNINGS #includeiostr…https://blog.csdn.net/yanxiaolx/article/details/53393437题目用c模拟实现一个学生成绩的信息管理系统要求能添加、删除、修改、查看和保存学生的信息等功能
源代码如下:[cpp] view plaincopy#define _CRT_SECURE_NO_WARNINGS #includeiostream using namespace std; #includestring.h #includefstream class student { private: student* next; public: char stu_num[15]; //学号 char stu_name[30]; //姓名 float stu_score; //成绩 void afterInsert(student *p);//在该节点后插入一个节点 void afterDelete();//在该节点后删除一个节点 student *getNext()//获得下一个节点的指针 { return next; } /***********查询学生信息************/ void getMage(); /******学生信息修改******/ void changeMage(int n, char *ptr); void changegrade(float p); /******构造*****/ student(char *num, char *name, float score); student(); }; void student::changegrade(float p) { stu_score p; } student::student() //构造 { strcpy(stu_num, \0); strcpy(stu_name, \0); stu_score 0; next \0; } student::student(char *num, char *name, float score) { strcpy(stu_num, num); strcpy(stu_name, name); stu_score score; next \0; } void student::afterInsert(student *p)//插入节点 { p-next next; next p; } void student::afterDelete() //删除节点 { student *p next; next p-next; delete p; } void student::getMage() //获得信息 { cout 学号 stu_num 姓名 stu_name; cout c成绩 stu_score endl; } void student::changeMage(int n, char *ptr) { switch (n) { case 1: strcpy(stu_num, ptr); break; case 2: strcpy(stu_name, ptr); } } //建立链表函数 void construct_list(student *tail) { student *p new student; char very[20]; float achieve; cout 请输入学号: endl; cin very; p-changeMage(1, very); cout 请输入姓名 endl; cin very; p-changeMage(2, very); cout 请输入c成绩 endl; cin achieve; p-changegrade(achieve); system(cls); cout 信息输入完毕 endl; for (; tail-getNext() ! \0;) { tail tail-getNext(); } tail-afterInsert(p); } /*********查询信息*********/ student *findmege(student *head) { loop: cout 1--按姓名查询 2--按学号查询 q--返回上一级菜单 endl; char p[5], ptr[20]; student *mid head; cin p; if (p[0] ! 1p[0] ! 2p[0] ! q || strlen(p)1) { system(cls); cout 对不起你的输入有误请重新输入 endl; goto loop; } switch (p[0]) { case 1: { system(cls); cout 请输入要查找的姓名 endl; cin ptr; for (; strcmp(ptr, mid-stu_name) ! 0; mid mid-getNext()) { if (mid-getNext() \0) { cout 对不起你要查找的人不存在请确认你的输入是否正确 endl; goto loop; } } return mid; } case 2: { system(cls); cout 请输入您要查找的学号 endl; cin ptr; for (; strcmp(ptr, mid-stu_num) ! 0; mid mid-getNext()) { if (mid-getNext() \0) { cout 对不起您要查找的内容不存在请确认您的输入是否正确 endl; goto loop; } } return mid; } case q: { return \0; } default: { system(cls); cout 对不起您的输入有误请重新输入 endl; goto loop; } } } /******************删除链表 节点***********************/ void delete_list(student *head) { student *p \0; char selet[4]; system(cls); cout 在删除前系统会根据您的提示找到您要删除的学生信息 endl; p findmege(head); if (p ! \0) { cout 确认要删除吗yes/任意键返回 endl; cin selet; if (strcmp(selet, yes) 0) { for (; head-getNext() ! p; head head-getNext()); head-afterDelete(); system(cls); cout 该信息删除成功 endl; } } } /*******************修改节点信息********************/ void change_info(student *head) { system(cls); cout 在您修改前系统会根据您提供的信息找的您要修改的信息 endl; student *p \0; float achieve; p findmege(head); if (p ! \0) { cout 请输入c成绩: endl; cin achieve; p-changegrade(achieve); system(cls); cout 修改成功! endl; } } /**************输出学生成绩信息**************/ void output(student *head) { system(cls); cout 1-查看指定学生信息2-查看所有学生信息3-分段输出学生信息 endl; char ch; int n 0; head head-getNext(); cin ch; switch (ch) { case 1: head findmege(head); if (head \0) { break; } head-getMage(); break; case 2: while (head) { head-getMage(); head head-getNext(); } break; case 3: cout a-60分以下b-60~70分之间c-70~80分之间d-80~90分之间e-90~100分之间 endl; cin ch; switch (ch) { case a: while (head) { if (head-stu_score 60) { head-getMage(); n; } head head-getNext(); } break; case b: while (head) { if (head-stu_score60 head-stu_score 70) { head-getMage(); n; } head head-getNext(); } break; case c: while (head) { if (head-stu_score70 head-stu_score 80) { head-getMage(); n; } head head-getNext(); } break; case d: while (head) { if (head-stu_score80 head-stu_score 90) { head-getMage(); n; } head head-getNext(); } break; case e: while (head) { if (head-stu_score90 head-stu_score 100) { head-getMage(); n; } head head-getNext(); } } if (n 0) { cout 该分段内没有您要找的学生信息 endl; } } } /*****************主菜单************************/ void mainmenu(student *head) { char selet[10]; int n 1; ofstream outfile; ifstream infile; student *p, *ptr; student *test head, *mid; cout *************************欢迎进入学生信息管理系统************************* endl; do { cout ************************************************************************** endl; cout 1.插入信息 2.删除信息 3.修改信息 4.查看信息 5.保存 endl; cout 按q键退出 endl; cout ************************************************************************** endl; cin selet; if (((selet[0]1 || selet[0]6) selet[0] ! q) || strlen(selet)1) { system(cls); cout 您的输入有误请重新输入 endl; break; } switch (selet[0]) { case 1: construct_list(head); break; case 2: delete_list(head); break; case 3: change_info(head); break; case 4: output(head); break; case 5: outfile.open(students.txt, ios::out | ios::app); for (p head-getNext(); p ! \0; p p-getNext()) { outfile p-stu_name ; outfile p-stu_num ; outfile p-stu_score ; outfile endl; } outfile.close(); system(cls); cout 保存成功 endl; break; case q: break; } } while (selet[0] ! q); } void main() { student head; mainmenu(head); } 运行结果部分截图
