Using a string array and int array together.

[KevinP]

I have a list 51 locations and there populations and I have the names of the states going into one array and the populations going into another array. I am using for loops to find the lowest and highest populations. My problem is I need to use cout to display the name of the location next to which population is the highest/lowest. I know that the elements would be stored in the same locations as they are on the same lines in .txt file. How do I access which element is storing the high/low populations?

  #include <iostream>
#include <string>
#include <fstream>
#include <iomanip>

using namespace std;

int main()
{
	ifstream fin;
	const int NUM_STATE = 51;
	string state  [NUM_STATE];
	int population [NUM_STATE];
	int i;
	int popHigh = 0;
	int popLow = 9999999999999;
	int totalPop = 0;           
	int averagePop;
	

	fin.open("statePopulation.txt");
	if (!fin)
		cout << "Error opening file. \n" ;
	else
	{
		for(i = 0; i < NUM_STATE ; i++)
			{
			fin >> population[i];
			fin.ignore();
			getline(fin, state[i]);
			}
	

	for ( i = 0; i < NUM_STATE ;i++)
	{	
		cout << state[i] << " " ;
		cout << population[i] << endl;

		totalPop += population[i];
		averagePop = totalPop/NUM_STATE;

		if (population[i] > popHigh)
			popHigh = population[i];
		
		if (population[i] < popLow )
			popLow = population[i] ;
			
		
	}

	for ( i = 0; i < NUM_STATE ;i++)
	{
		if (population[i] > popHigh)
			popHigh = population[i];
		
	}
	cout << population[i] << endl ;
	cout << popHigh << endl;
	cout << popLow << endl;
	cout << totalPop << endl;
	cout << averagePop << endl;
	

	}
	fin.close();
	return 0;
}

[Yanson]

You need to save the index of the highest and lowest populations.

#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>

using namespace std;

int main()
{
	ifstream fin;
	const int NUM_STATE = 5;
	string state  [NUM_STATE];
	int population [NUM_STATE];
	int i;
	int popHigh = 0;
	int popLow = 9999999999999;
	int totalPop = 0;           
	double averagePop;
	int indexOfPopHigh = 0;
	int indexOfPopLow = 0;
	

	fin.open("statePopulation.txt");
	if (!fin)
		cout << "Error opening file. \n" ;
	else
	{
		for(i = 0; i < NUM_STATE ; i++)
			{
			fin >> population[i];
			fin.ignore();
			getline(fin, state[i]);
			}
	

	for ( i = 0; i < NUM_STATE ;i++)
	{	
		cout << state[i] << " " ;
		cout << population[i] << endl;

		totalPop += population[i];

		if (population[i] > popHigh)
		{
			popHigh = population[i];
			indexOfPopHigh = i;  //<----saves index of highest population
		}
		
		if (population[i] < popLow )
		{
			popLow = population[i] ;
			indexOfPopLow = i;  //<-------saves index of the lowest population
		}
	}

	averagePop = totalPop/NUM_STATE;
                                  
	cout << "The highest population is " << popHigh << " " << state[indexOfPopHigh] << endl;
	cout << "The lowest population is " << popLow << " " << state[indexOfPopLow] << endl;
	cout << "The total population is " << totalPop << endl;
	cout << "The average population is " << averagePop << endl;
	}
	
	fin.close();
	cin.ignore();
	return 0;
}