C++實現(xiàn)學生成績管理系統(tǒng)最新版
更新時間:2021年06月17日 15:23:55 作者:名名名名
這篇文章主要為大家詳細介紹了C++實現(xiàn)學生成績管理系統(tǒng)最新版,文中示例代碼介紹的非常詳細,具有一定的參考價值,感興趣的小伙伴們可以參考一下
學生成績管理系統(tǒng),供大家參考,具體內容如下
一、問題描述及功能要求
(1)輸入同學的學號,姓名,三門科成績(應用數(shù)學、大學英語、計算機應用基礎)
(2)可以計算出每個學生三門課的平均成績。
(3)可通過輸入姓名、學號查詢成績,也可通過姓名修改學生信息,也可通過主界面刪除學生信息,以及清楚所有信息
二、代碼實現(xiàn) 帶有注釋
廢話不說,直接代碼,歡迎指正。
大家CV可能有不兼容的情況,可以跟我滴滴,盡可能解決問題地回復。
#include <cstdlib> #include <iostream> #include <string> using namespace std; #define null NULL class student { private: friend class studentMessage; student *next; //節(jié)點指針 string name; //學生姓名 int age; //年紀 int id; //學號 double score[3]; //三科成績 double total; //總分 double average; //平均成績 public: student(string _name,int _age,int _id,double *_score) { name = _name; age = _age; id = _id; score[0] = _score[0]; score[1] = _score[1]; score[2] = _score[2]; total = score[0]+score[1]+score[2]; average = total/3; next = NULL; } student() //為studentMessage初始化頭結點用 { name = "null"; age = 0; id = 0; score[0]=score[1]=score[2]=0; total = 0; average = 0; next = NULL; } ~student(){} void swap(student*); }; void student::swap(student *q) { string _name; int _age,_id; double _score[3],_total,_average; _name = name; name = q->name; q->name = _name; _age = age; age = q->age; q->age = _age; _id = id; id = q->id; q->id = _id; _score[0] = score[0]; score[0] = q->score[0]; q->score[0] = _score[0]; _score[1] = score[1]; score[1] = q->score[1]; q->score[1] = _score[1]; _score[2] = score[2]; score[2] = q->score[2]; q->score[2] = _score[2]; _total = total; total = q->total; q->total = _total; _average = average; average = q->average; q->average = _average; } class studentMessage { private: student *first; //頭指針 int num; //信息中的學生人數(shù) public: studentMessage() { num = 0; //初始化學生人數(shù)為0 first = new student; //初始化頭結點 } ~studentMessage(){delete first;} /*管理系統(tǒng)常規(guī)操作*/ void Insret(void); //插入 void Display(void); //顯示 void Delete(void); //刪除 void Search(void); //搜索 void Change(void); //改動 void sortByLesson1(void); //按成績一來排序 void sortByLesson2(void); //按成績二來排序 void sortByLesson3(void); //按成績三來排序 void sortByTotal(void); //按總分來排序 void SearchByid(void); //按照學號查找 void SearchByname(void); //按照姓名查找 int menu(void); //初始的菜單 void clear(void); //清空列表 }; int studentMessage::menu(void) { int ch; cout<<"**********************************************************************"<<endl; cout<<"======================================================================"<<endl; cout<<"***************************學生成績管理系統(tǒng)***************************"<<endl;cout<<endl; cout<<"1.顯示所有學生成績"<<endl; cout<<"2.添加學生信息"<<endl; cout<<"3.查詢學生信息"<<endl; cout<<"4.修改學生信息"<<endl; cout<<"5.刪除最下面一個學生信息"<<endl; cout<<"6.刪除所有信息"<<endl; cout<<"0.退出系統(tǒng)"<<endl;cout<<endl; cout<<"********************Copyright@ By Jeaven Wong**************************"<<endl; cout<<"======================================================================="<<endl; cout<<"***********************************************************************"<<endl; cin >> ch; cout<<"\n\n\n"<<endl; return ch; } //插入 void studentMessage::Insret(void) { string name; int age; int id; double score[3]; cout<<"請輸入學生姓名: "; cin>>name; cout<<"請輸入學生年齡: "; cin>>age; cout<<"請輸入學生學號: "; cin>>id; cout<<"下面請輸入學生三門課程成績: "; cout<<endl; cout<<"請輸入第一門課的成績: ";cin>>score[0]; cout<<"請輸入第二門課的成績: ";cin>>score[1]; cout<<"請輸入第三門課的成績: ";cin>>score[2]; cout<<endl; student *newstu = new student(name,age,id,score); student *p = first; while(p->next != NULL) { p = p->next; } p->next = newstu; newstu->next = null; num++; } void studentMessage::Display(void) { if(num == 0) { cout<<"當前記錄中無學生..."<<endl; } else { student *p = first->next; while(p != null) { cout<<"姓名:"<<p->name<<" "; cout<<"年齡:"<<p->age<<" "; cout<<"學號:"<<p->id<<" "; cout<<"三門課程成績: "<<p->score[0]<<" "<<p->score[1]<<" "<<p->score[2]<<" "; cout<<"總分:"<<p->total<<" "; cout<<"平均分:"<<p->average<<endl; p = p->next; } } } void studentMessage::Delete(void) { student *p = first; student *pre = first; while(p->next != NULL) { pre = p; p = p->next; } pre->next = NULL; delete p; num--; } void studentMessage::Search(void) { int temp = 0; cout<<"請輸入查找的條件,有如下選項..."<<endl; cout<<"按照學號查找(請輸入【1】) 按照姓名查找(請輸入【2】)"<<endl; cin>>temp; switch(temp) { case 1: SearchByid(); break; case 2: SearchByname(); break; default: cout<<"輸入有誤..."<<endl; } } void studentMessage::SearchByid(void) { int _id; int flag = 0; cout<<"請輸入待查找學生的學號:"; cin >> _id; student *p = first->next; while(p != null) { if(p->id == _id) { flag = 1; cout<<"下面是查找匹配結果:"<<endl; cout<<"姓名:"<<p->name<<" "; cout<<"年齡:"<<p->age<<" "; cout<<"學號:"<<p->id<<" "; cout<<"三門課程成績: "<<p->score[0]<<" "<<p->score[1]<<" "<<p->score[2]<<" "; cout<<"總分:"<<p->total<<" "; cout<<"平均分:"<<p->average<<endl; } p = p->next; } if(flag == 0) { cout<<"抱歉,記錄中沒有查找匹配項..."<<endl; } } void studentMessage::SearchByname(void) { string _name; int flag = 0; cout<<"請輸入待查找的學生姓名: "; cin >> _name; student *p = first->next; while(p != null) { if(p->name == _name) { flag = 1; cout<<"下面是查找匹配結果:"<<endl; cout<<"姓名:"<<p->name<<" "; cout<<"年齡:"<<p->age<<" "; cout<<"學號:"<<p->id<<" "; cout<<"三門課程成績: "<<p->score[0]<<" "<<p->score[1]<<" "<<p->score[2]<<" "; cout<<"總分:"<<p->total<<" "; cout<<"平均分:"<<p->average<<endl; } p = p->next; } if(flag == 0) { cout<<"抱歉,記錄中沒有查找匹配項..."<<endl; } } void studentMessage::Change(void) { string _name; int flag = 0,temp; int _id,_age; int course = 0; cout<<"請輸入需要改動信息的學生的姓名: "; cin >> _name; student *p = first->next; while(p != null) { if(p->name == _name) { flag = 1; cout<<"該學生當前信息如下:"<<endl; cout<<"姓名:"<<p->name<<" "; cout<<"年齡:"<<p->age<<" "; cout<<"學號:"<<p->id<<" "; cout<<"三門課程成績: "<<p->score[0]<<" "<<p->score[1]<<" "<<p->score[2]<<" "; cout<<"總分:"<<p->total<<" "; cout<<"平均分:"<<p->average<<endl; cout<<"請指明哪一項需要修改..."<<endl; cout<<"修改學號(輸入【1】) 修改年齡(輸入【2】)修改成績(輸入【3】)"<<endl; cin >> temp; switch(temp) { case 1: { cout<<"請輸入新的學號:";cin>>_id; p->id = _id; } break; case 2: { cout<<"請輸入新的年齡:";cin>>_age; p->age = _age; } break; case 3: { cout<<"請按指示修改課程成績..."<<endl; cout<<"是否需要修改第一門課程成績?(需要輸入【1】不需要輸入【0】)"<<endl; cin >> course; if(course == 1) { cout<<"請輸入修改后的第一門課的成績:"; cin >> p->score[0]; } course = 0; cout<<"是否需要修改第二門課程成績?(需要輸入【1】不需要輸入【0】)"<<endl; cin >> course; if(course == 1) { cout<<"請輸入修改后的第二門課的成績:"; cin >> p->score[1]; } course = 0; cout<<"是否需要修改第三門課程成績?(需要輸入【1】不需要輸入【0】)"<<endl; cin >> course; if(course == 1) { cout<<"請輸入修改后的第三門課的成績:"; cin >> p->score[2]; } course = 0; p->total = p->score[0]+p->score[1]+p->score[2]; p->average = p->total/3; cout<<"修改后的信息如下: "<<endl; cout<<"姓名:"<<p->name<<" "; cout<<"年齡:"<<p->age<<" "; cout<<"學號:"<<p->id<<" "; cout<<"三門課程成績: "<<p->score[0]<<" "<<p->score[1]<<" "<<p->score[2]<<" "; cout<<"總分:"<<p->total<<" "; cout<<"平均分:"<<p->average<<endl; } break; default: cout<<"輸入有誤..."<<endl; } } p = p->next; } if(flag == 0) cout<<"當前記錄中沒有次學生..."<<endl; } /*排序我均采用冒泡排序法,均是從小到大排序*/ //按照科目一排序 void studentMessage::sortByLesson1(void) { student *p = first->next; while(p->next != null) { student *q = p->next; while(q != null) { if(p->score[0] > q->score[0]) { p->swap(q); } q = q->next; } p = p->next; } } //按照科目二排序 void studentMessage::sortByLesson2(void) { student *p = first->next; while(p->next != null) { student *q = p->next; while(q != null) { if(p->score[1] > q->score[1]) { p->swap(q); } q = q->next; } p = p->next; } } //按照科目三排序 void studentMessage::sortByLesson3(void) { student *p = first->next; while(p->next != null) { student *q = p->next; while(q != null) { if(p->score[2] > q->score[2]) { p->swap(q); } q = q->next; } p = p->next; } } //按照總成績排序 void studentMessage::sortByTotal(void) { student *p = first->next; while(p->next != null) { student *q = p->next; while(q != null) { if(p->total > q->total) { p->swap(q); } q = q->next; } p = p->next; } } void studentMessage::clear(void) { student *p = first->next; while(p != null) { first->next = p->next; p->next = null; delete p; p = first->next; } } int main() { studentMessage stulist; int ch; while(ch = stulist.menu()) { switch(ch) { case 1: stulist.Display(); break; case 2: stulist.Insret(); break; case 3: stulist.Search(); break; case 4: stulist.Change(); break; case 5: stulist.Delete(); break; case 6: stulist.clear(); break; default: cout<<"請按要求輸入..."<<endl; } } return 0; }
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