学生信息管理系统(控制台)

1.运行截图：注: 1.按c++，数学，英语依次排序；2.多出信息为文件原有信息。

2.源代码（所有代码均在.cpp文件中，所以有点乱; 另：在vs2013下编译通过，在vc6.0下需要将strcpy_s改为strcpy，某处的循环变量i 会出现错误，改为j 即可;文件需事先创建）#include<iostream>#include<string.h>#include<fstream>#include<iomanip>using namespace std;//------------------------------------------------------------////------------------------类----------------------------------////------------------------------------------------------------//////------------------------成绩类------------------------------//class CGrade{public:CGrade(){}CGrade(float fCpp, float fMath, float fEnglish);~CGrade();void setCpp(float fCpp);void setMath(float fMath);void setEnglish(float fEnglish);float getCpp();float getMath();float getEnglish();private:float fCpp, fMath, fEnglish;};//------------------SET方法------------------------------//void CGrade::setCpp(float fCpp){this->fCpp = fCpp;}void CGrade::setMath(float fMath){this->fMath = fMath;}void CGrade::setEnglish(float fEnglish){this->fEnglish = fEnglish;}//---------------------GET方法--------------------------//float CGrade::getCpp(){return this->fCpp;};float CGrade::getMath(){return this->fMath;};float CGrade::getEnglish(){return this->fEnglish;};//-------------------------------------------------------CGrade::CGrade(float fCpp, float fMath, float fEnglish){this->fCpp = fCpp;this->fMath = fMath;this->fEnglish = fEnglish;};CGrade::~CGrade(){};////-------------------------------学生类---------------------------------------// class CStudent{public:CStudent(){}CStudent(char sName[30],int nAge,char cSex,float fCpp,float fMath,float fEnglish);~CStudent();void setStudent(char sName[30], int nAge, char cSex, float fCpp, float fMath, float fEnglish);void showStudent();char* getStudentName();float getStudentCppGrade();float getStudentMathGrade();float getStudentEnglishGrade();private:char sName[30];char cSex;int nAge;CGrade Grade;};//---------------------------------------------------------------------------------------------------------void CStudent::setStudent(char sName[30], int nAge, char cSex, float fCpp, float fMath, float fEnglish){strcpy_s(this->sName, sName);this->nAge = nAge;this->cSex = cSex;Grade.setCpp(fCpp);Grade.setMath(fMath);Grade.setEnglish(fEnglish);};//----------------------------------------------------------------------------------------------------------float CStudent::getStudentCppGrade(){return Grade.getCpp();};float CStudent::getStudentMathGrade(){return Grade.getMath();};float CStudent::getStudentEnglishGrade(){return Grade.getEnglish();};//-----------------------------------------------------------------------------------------------------------CStudent::CStudent(char sName[30], int nAge, char cSex, float fCpp, float fMath, float fEnglish) :Grade(fCpp,fMath,fEnglish){strcpy_s(this->sName, sName);this->nAge = nAge;this->cSex = cSex;};void CStudent::showStudent(){cout << setw(10) << setiosflags(ios::left) << sName << setw(5) << setiosflags(ios::left) << nAge << setw(5) << setiosflags(ios::left) << cSex;cout << setw(5) << setiosflags(ios::left) << Grade.getCpp()<< setw(5) <<setiosflags(ios::left) << Grade.getMath() << setw(5) << setiosflags(ios::left) << Grade.getEnglish() << endl;}char* CStudent::getStudentName(){return sName;}CStudent::~CStudent(){};/////////////////////////////////////////////////////////////////////////////////-------------------------------函数----------------------------------------/////////////////////////////////////////////////////////////////////////////////////-----------------------------输入函数--------------------------------------//void Grade_input(int n, CStudent *student){float fCpp, fMath, fEnglish;char cSex;int nAge;student = new CStudent[n];cout << "请输入学生的基本信息，包括：姓名，年龄，性别(M/F)，C++、数学、英语成绩"<< endl;for (int i = 0; i < n; i++){char sName[30] = { "\0" };cin >> sName >> nAge >> cSex >> fCpp >> fMath >> fEnglish;if (nAge >= 200 || nAge <= 0 || (cSex != 'm'&&cSex != 'M'&&cSex != 'f'&&cSex != 'F') || (fCpp>100 || fCpp <= 0 || fMath > 100 || fMath <= 0 || fEnglish > 100 || fEnglish <= 0))cout << "输入错误，请重新输入：" << endl;i--;continue;}student[i].setStudent(sName,nAge,cSex,fCpp,fMath,fEnglish);}ofstream Studentfile("F://student.dat",ios::in|ios::out|ios::ate|ios::binary);if (Studentfile.is_open()){for (int i = 0; i < n; i++){Studentfile.write((char*)&student[i], sizeof(student[i]));}}delete[] student;};//-------------------------重载函数：查找---------------------------------//bool Find(char* arr_1,char* arr_2){return !strcmp(arr_1,arr_2);};bool Find(float a, float b){if (a == b) return true;else return false;return false;};//--------------------------模板函数comp----------------------------------// template<class T>int comp(T a, T b){if (a > b) return 1;else if (a == b) return 0;else return -1;};//---------------------------Swap-----------------------------------//template <class T>void Swap(T &a,T &b){T temp;temp = a;b = temp;}//---------------------------排序函数(交换排序)-------------------------------//void Sort(CStudent* student,int n){for (int i = 0; i < n-1; i++){for (int j = i + 1; j < n; j++){if (comp(student[i].getStudentCppGrade(), student[j].getStudentCppGrade()) == -1)Swap(student[i], student[j]);else if (comp(student[i].getStudentCppGrade(),student[j].getStudentCppGrade()) == 0){if (comp(student[i].getStudentMathGrade(),student[j].getStudentMathGrade()) == -1)Swap(student[i], student[j]);else if (comp(student[i].getStudentMathGrade(),student[j].getStudentMathGrade()) == 0){if (comp(student[i].getStudentEnglishGrade(),student[j].getStudentEnglishGrade()) == -1)Swap(student[i], student[j]);}}}}};//-------------------------------获取人数---------------------------------//int getStudentNumber(){fstream Studentflie("F://student.dat", ios::in | ios::out | ios::binary);Studentflie.seekg(0, ios::end); //设置文件指针到文件流的尾部int ps = Studentflie.tellg(); //读取文件指针的位置return ps / sizeof(CStudent);}//////////////////////////////////////////////////////////////////////////////-------------------------------主函数-----------------------------------//////////////////////////////////////////////////////////////////////////////int main(){CStudent *student = NULL;int n=0,sum=getStudentNumber();char judge;fstream Studentflie("F://student.dat", ios::in | ios::out | ios::binary); fstream studentfile("F://sortst.dat", ios::out | ios::in |ios::binary); cout << "是否添加信息?Y/N" << endl;cin >> judge;if (judge == 'Y' || judge == 'y'){cout << "输入学生数目：";cin >> n;Grade_input(n, student);}n += sum;student = new CStudent[n];if (studentfile.is_open()){for (int i = 0; i < n; i++){Studentflie.read((char*)&student[i], sizeof(student[i]));}Sort(student,n);cout << "排序如下：" << endl;for (int i = 0; i < n; i++){studentfile.write((char*)&student[i], sizeof(student[i]));student[i].showStudent();}}else{cout << "文件打开失败！" << endl;abort();}if (Studentflie.is_open()){for (int i=0;;i++){int Way=0,Err=0;float grade;char Judge;char Name[30] = { "\0" };//if (i != 0){cout << "是否继续查找：Y/N" << endl;cin >> Judge;if (Judge == 'N' || Judge == 'n'){break;}}//cout << "输入查询方式:" << endl;cout << "1.按姓名查找；" << endl;cout << "2.按成绩查找." << endl;cout << "输入：1/2：";cin >> Way;if (Way > 2 || Way < 0){cout << "输入错误，请重新输入！" << endl;continue;}if (Way == 1){cout << "输入姓名:";cin >> Name;for (int i = 0; i < n; i++){Studentflie.read((char*)&student[i], sizeof(student[i]));if (Find(Name, student[i].getStudentName())){Err = 1;student[i].showStudent();}}}else if (Way==2){int way=0;cout << "输入查询科目：" << endl;cout << "1.C++；" << endl;cout << "2.数学；" << endl;cout << "3.英语；" << endl;cout << "4.不限科目." << endl;cout << "输入：1/2/3/4：";cin >> way;if (way>4||way<0){cout << "输入错误，请重新输入!" << endl;continue;}cout << "输入成绩：";cin >> grade;if (way == 1){for (int i = 0; i < n; i++){Studentflie.read((char*)&student[i], sizeof(student[i]));if (Find(grade, student[i].getStudentCppGrade())){Err = 1;student[i].showStudent();}}}else if (way == 2){for (int i = 0; i < n; i++){Studentflie.read((char*)&student[i], sizeof(student[i]));if (Find(grade, student[i].getStudentMathGrade())){Err = 1;student[i].showStudent();}}}else if (way == 3){for (int i = 0; i < n; i++){Studentflie.read((char*)&student[i], sizeof(student[i]));if (Find(grade, student[i].getStudentEnglishGrade())){Err = 1;student[i].showStudent();}}}else if (way==4){for (int i = 0; i < n; i++){Studentflie.read((char*)&student[i], sizeof(student[i]));if (Find(grade, student[i].getStudentCppGrade())){Err = 1;student[i].showStudent();}else if ( Find(grade, student[i].getStudentMathGrade()) ){Err = 1;student[i].showStudent();}else if ( Find(grade, student[i].getStudentEnglishGrade())){Err = 1;student[i].showStudent();}}}}if (Err != 1) cout << "没有找到对应项！" << endl;}}else{cout << "文件打开失败！" << endl;abort();}Studentflie.close();studentfile.close();delete[] student;return 0;}。