学生信息系统级分配矢量搜索

Question

让说，我有一个包含该数据

First Name Last Name  ID   Tuition GPA 
Alex   Robinson  02341  1400.50 3.45 
John   Brown   043261 1200.00 3.21 
Rachel   VanGorp  77239  600.00 4.00 
James   Smith   89167  1150.55 1.45 
Juan   Garcia   23165  1200.00 3.33 
Lindsey  McDonald  32501  1340.50 2.25 
Tom   Barry   78442  500.00 3.85 
Gwen   Poss   30029  1150.50 3.85 
Janice   Jones   44560  2200.50 2.45 
Jack   Price   99314  1850.55 3.12 

一个文本文件，我导入项目名单为载体，这里是我的学生类和我classOfStudents类。帮助这个信息将是伟大的。我迷路了，不知道该去哪里。只有参考和一个正确的方向点将是伟大的！

 class student 
     { 
    public: 
     student() 
     { 
      firstName = ""; 
      lastName = ""; 
      ID = ""; 
      tuitionBalance = 0.0; 
    GPA = 0.0; 
} 
student(string first, string last, string id, double tuition, double gpa) 
{ 
    first = firstName; 
    last = lastName; 
    id = ID; 
    tuition = tuitionBalance; 
    gpa = GPA; 
} 

void openIF() 
{ 
    inFile.open("students.txt"); 
} 
void setFirstName() 
{ 
    inFile >> temp; 
    firstName = temp; 
} 
void setLastName() 
{ 
    inFile >> temp; 
    lastName = temp; 
} 
void setID() 
{ 
    inFile >> temp; 
    ID = temp; 
} 
void setBalance() 
{ 
    inFile >> tuitionBalance; 
} 
void setGPA() 
{ 
    inFile >> GPA; 
} 
void closeIF() 
{ 
    inFile.close(); 
} 

string firstName, lastName, ID; 
double tuitionBalance, GPA; 
    private: 

ifstream inFile; 
char temp[128]; 
    } 

class classOfStudents 
{ 
public: 
    vector<student> students; 

    classOfStudents() 
    { 
     student Students = student(firstName, lastName, ID, tuitionBalance, GPA); 
     students.push_back(Students); 
    } 

    void findStudent() 
    { 
     int searchID; 
     cout << "Enter ID of student" << endl; 
     cin >> searchID; 
     find(students.begin(), students.end(), searchID); 
    } 

private: 
    string firstName, lastName, ID; 
    double tuitionBalance, GPA; 
} 

我怎么会拉与学生的只是ID其余的信息？

Answer 1

using namespace std; 

#include <iostream> 
#include <map> 

class student 
{ 
public: 
string firstName, lastName; 
int ID; 
double tuitionBalance, GPA; 

student(){} 

student(string fName, string lName, int id, double tBalance, double gpa) 
{ 
    firstName = fName; 
    lastName = lName; 
    ID = id; 
    tuitionBalance = tBalance; 
    GPA = gpa; 
} 
}; 

class classOfStudents 
{ 
public: 

std::map <int, student> StudentMap; 

classOfStudents() 
{ 
    student Students = student("Firstname", "Lastname", 123, 0.00, 4.00); 
    StudentMap.insert(std::pair<int, student>(123, Students)); 
} 

void findStudent() 
{ 
    int searchID; 
    cout << "Enter ID of student" << endl; 
    cin >> searchID; 

    if (StudentMap.find(searchID) == StudentMap.end()) 
    { 
     printf("Student not found"); 
    } 
    else 
    { 
     printf("Name: %s %s ", StudentMap[searchID].firstName, StudentMap[searchID].lastName); 
    } 
} 
};