Creating several variables in a while loop?

[McFads1]

Background: Assignment for my class, create a program that checks the letters of a entered string.

int main()
{
	const string key = "abcabcabcabcabcabcab";  
	int numstudents;									
	cout << "How many students took the test" << endl;
	cin >> numstudents ;
	while(numstudents>0)                   
	{ string studentId;		                  
	  string studentanswer;
          cout << "enter student ID"; 
	  cin >> studentId;	
	  cout << "enter answers of that student" << endl;
	  cin >> studentanswer;
	  numstudents--;
	};

So the jist of the assignment is to grade answers that are inputted by the student with the answerkey.

Here's my problem. I can't figure out a way to make each inputted studentId assigned to its own variable, I don't want to replace studentId over and over again. It's inside the while loop. And once I figure out how to do that, I'm confused on how match each student answer to its corresponding studentId?


I'm not asking this forum to do my homework, I need advice/help on how to do this.

[toum]

You can simply use vectors (or arrays):

std::vector<string> studentIdVector, studentanswerVector;
while(numstudents>0)                   
{ 
    string studentId, studentanswer;

    cout << "enter student ID"; 
    cin >> studentId;	
    studentIdVector.push_back(studentId);

    cout << "enter answers of that student" << endl;
    cin >> studentanswer;
    studentanswerVector.push_back(studentanswer);

    numstudents--;
}

I'm confused on how match each student answer to its corresponding studentId

They will be at the same index in their respective vector/array.

[McFads1]

I misread the instruction! I managed to figure out a way to do it. Now, I have a new problem.

Now I'm trying to compare the studentanswer string to the key string, each character individually. I'm just using if statements for each character, but I feel like theres a much better way to do that.

How can I erase parts of a string, and how can I access just 1 character of a string?