Question

I wrote a program which is supposed to just print all the strings in a vector.
I’m using an Iterator.
The error I’m getting is:

no match for 'operator[]' in '((Students*)this)->Students::courses_[it]'

This is my code:

#include <vector>
#include <string>
#include <iostream>
using namespace std;
#include "../include/Courses.h"
class Courses;

class Students {
private:
string name_;
int id_;

public:
vector<string> courses_;
void print_courses(){
    vector<string>::iterator it;
    for(it=courses_.begin();it < courses_.end(); it++)
            cout << this->courses_[it] << " ";
}

Answer 1

An iterator is used by dereferncing it, not by feeding it to operator[]. Your code should be:

void print_courses(){
    vector<string>::iterator it;
    for(it=courses_.begin();it < courses_.end(); it++)
            cout << *it << " ";
}

operator[] is used to index a vector by numbers.