C ++搜索動態數組

Question

我有一個程序，其中包含COSID在100到200之間的學生的數據文件以及他們注冊的課程。它看起來像： 100 Greg Samson 3 COS301 COS431 COS490 120 Jo Ann Lyons 0 。 我有一個動態數組，包含學生正在學習的所有課程。 我遇到的問題是，當使用此原型輸入課程ID時，我被要求在特定類中打印其他人： void printList (ostream& out, FlexArray<Student> majors, int cosID, string course);

我真的不確定如何創建函數來搜索該類型的數組。 我試圖使用數組，因此所有的COSID都是-1所以當我嘗試搜索時，我應該更容易找到有信息的元素，但也無法完成。 這是我到目前為止的代碼T：

#include <iostream>
#include <string>
#include <iomanip>
#include <fstream>
#include "templates.h"


using namespace std;

struct Student {

  int COSID;
  string fname;
  string lname;
  int totCourses;
   string * coursearr;
};
void printList (ostream& out,  FlexArray<Student> majors,  int cosID, string course);

int main(){
    Student s; // Object for struct student
    int searchCOSID; //varible to find COS id
    int Loopcheck = -1; //break loop variable
    string LoopCOSID = ""; //break loop variable
    FlexArray<Student> fa(100,200); //object for flex array setting Upper bounds to 200 and lower bounds to 100

    //Initilize the flexarray cosid to -1;
    for(int i=100; i<=200; i++){
        fa[s.COSID = -1];
    }
    cout << fa[105].COSID;
    char c;


    ifstream  fin;              // declare input file stream object 
    fin.open ("a5.txt");
    fin >> s.COSID;
    fin.get(c);
    getline(fin, s.fname);
    getline(fin, s.lname);
    fin >> s.totCourses;
    while(!fin.fail()){
        s.coursearr = new string[s.totCourses];
        if(s.totCourses > 0){
        for(int i=0; i<s.totCourses; i++){
            fin >> s.coursearr[i];
        }
        }
        fa[s.COSID] = s;
        fin >> s.COSID;
        fin.get(c);
        getline(fin, s.fname);
        getline(fin, s.lname);
        fin >> s.totCourses;
    }



        cout << "\nEnter your COS ID: ";
        cin >> searchCOSID;
        Student currstudent = fa[searchCOSID];
        if(currstudent.COSID=-1){
            cout << "ID not asscoaited with a student";
        }else{
            cout << "The courses taken this semester by " << currstudent.fname  << " " << currstudent.lname << " include:";
            if(currstudent.totCourses > 0){
                for(int i=0; i<currstudent.totCourses;i++){
                cout << "\n" << currstudent.coursearr[i];
                }
            }
            else{cout << endl <<"No courses";}
        }



    while(Loopcheck == -1){
        cout << "\n\nEnter a couses (Q) to quit: ";
        cin >> LoopCOSID;
        if(LoopCOSID == "Q" || LoopCOSID=="q"){
            Loopcheck = 0;
        }else{
            string course;
            cout << endl << "Other students taking this course include: ";
            //printList(cout,FlexArray<Student>,searchCOSID,coursearr);
        }

    }
    return 0;


}

void printList (ostream& out,  FlexArray<Student> majors,  int cosID, string course){
    for (int i = 0; i<101; i++){

    }


}

Answer 1

For each student s in majors (silly name for a list of students isn't it?)
   if s.COSID is not cosID
       for each class c that s is taking
           if c equals course
               display s.fname

我認為。 這很難說。 print other people in a paticular class when a course ID is inputed using this prototype: void printList (ostream& out, FlexArray<Student> majors, int cosID, string course); 這是否意味着打印誰正在服用的所有學生course ，除了那誰的COSID是cosID參數？