Creating a menu using vectors, strings and arrays while reading from 2 text files

[deathslice]

Alright, I been trying to do this for a couple of hours but I'm not getting anywhere. First of all, I have 2 text files that I need to read from a different function which is simple enough. Then for one of the text files, mainly the college.txt, I have to add it to a vector of strings; for the other text file(states.txt), I have to add the states to parallel arrays of strings.

The problem(This is related to the college.txt file) I have is how do I compare the strings the user inputs to the strings inside the vector since I have to validate whether or not the colleges/universities that the user inputs are on the list(and of course repeat it until the user decides to quit but that's also simple enough to do with a while loop).

Note1: Before you ask, The else/if with empty statements are empty because I want to focus on this problem first and then I will continue on with the program.

Note2: The IDE that I'm using is CodeBlocks

New problem-Whenever I input the name of a college or university that I know is in the list, it causes an infinite loop to occur and if that doesn't happens it outputs the cout statement "Error, invalid input" multiple times.

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <cstdlib>
using namespace std;

bool DoesStringEqualVector(vector<string> total, string name)
{
    for (unsigned int i=0; i < total.size(); ++i)
    {
        if (name == total[i])
              return true;
    }
    return false;
}

void collegesUniversities(string)
{
    ifstream campuses;
    campuses.open("colleges.txt");

    string schools;
    vector<string> schoolVector;

    if(!campuses)
        cerr << "Error opening file. ";
    else
    {
      while(campuses.good())
       {
         getline(campuses,schools, '\n');
         schoolVector.push_back(schools);
         cout << schools << endl;
       }
    }

    DoesStringEqualVector(schoolVector, schools);

    campuses.close();
}

int main()
{
    char response;
    string comparison;
    int choice;
    string userInput;

 cout << "Welcome to my college and university search program.\n";
 cout << "\nPress any button to continue.\n ";
                          system("pause>nul");

  do
{
 cout << "\nPress 1 to enter possible colleges and universities.";
 cout << "\nPress 2 to find out how many colleges and universities";
 cout << " appear in your state.\n";
 cout << "Press 3 to find the total amount of colleges and";
 cout << " universities in our list. ";
 cout << "\nPress 4 to quit. ";
 cin >> choice;

  if(choice == 1)
   {
     do
      {
        cout << "\nEnter the name of your college/university. ";
        cin >> userInput;

        collegesUniversities(comparison);

        if(userInput != comparison)
          cout << "\nThis institution isn't on out list.\n ";
        else
          cout << "\nThis institution is on the list.\n";

        cout << "\nWould you like to return to the menu?[Y/N] ";
        cin >> response;

        while(response != 'Y' && response != 'y' && response != 'N' &&
              response != 'n')
        {
            cerr << "\nError, Invalid Input. ";
            cin >> response;
        }
      }
      while(response != 'N' && response != 'n');
   }

   else if(choice == 2)
    {

    }

   else if(choice == 3)
    {

    }

   else if(choice == 4)
   {
      cout << "\nThank you for using my program. ";
      cout << "Have a great day.\n ";
   }

   else
       {
         cerr << "\nError, Invalid input. ";
         cout << "Only integers from 1 through 4 are allowed.\n";
       }
}
  while(choice != 4);
}

[anup30]

#include <iostream>
#include <vector>
using namespace std;
int main () {
	vector<string>vec{"C", "C++", "Java", "Python" };
	
	for(auto x: vec)
		cout << x << " ";
	
	cout << "\n";
	
	string s;
	char c = 'y';
	int count;
	while(c=='y')
	{
		count = 0;
		cout << "enter a programming language you know:\n";
		cin >> s;
		for(auto x: vec)
		{
		if(s==x)
			count++;
		}
		
		if(count!=0)
		cout << "it matched our requirement!\n";
		else cout << "no match\n";
		
		cout<< "try again? : y to continue\n";
		cin >> c;		
		
	}

return 0;	
}