#include <iostream>
using namespace std;

int main()
{
	// Declaring Variables
	int numscores = 0;
	double average = 0.0;
	double total = 0.0;
errorcheck1:

	// Ask for user input: How many tests to average
	cout << "Please enter how many test scores you would like to average: ";
	cin >> numscores;

	// Check to make sure number of scores is greater then 0 but less then 101
	if (numscores <= 0 || numscores > 100)
	{
		cout << "You must enter a number greater then 0 but less then 101!" << endl;
		cout << endl;
		goto errorcheck1;
	}
	// Getting the values for the number of tests
	// Start of loop
	double scores[100] = {0};
	for (int x = 1; x <= numscores; x++)
	{
		cout << "Enter test score #" << x << ": ";
		cin >> scores[x];
		if (scores[x] < 0 || scores[x] > 100)
		{
			cout << "==============================================" << endl;
			cout << "Error: Please enter a value between 0 and 100. " << endl;
			cout << "==============================================" << endl;
			x = x - 1;
		}
	} // End of loop
	// This is the output section
	cout << "=======================================" <<endl;
	cout << "Total number of test scores: " << numscores << endl;
	// Add all of the scores and call it total
	for (int y = 0; y <= numscores; y++)
	{
		total = total + scores[y];
	}
	// End loop
	// Below I will average the scores then display them
	average = total / numscores;
	cout << "Average of all test scores: " << average << endl;
	//End
	// Needed for some compilers like mine
	return 0;
}

#include <iostream>
 
int main() {
  std::string user_input;
 
  std::cout << "How many years old are you? ";
  std::getline( std::cin, user_input );
 
  return EXIT_SUCCESS;
  }

#include <algorithm>
#include <iostream>
#include <cctype>
 
// This is just a fancy way of making a function that returns
// true if c is not a digit in '0'..'9'. Except, instead of a function,
// it is an object.
class nondigit {
  public:
    bool operator () ( char c ) { return !isdigit( c ); }
  };
 
int main() {
  std::string user_input;
 
  std::cout << "How many years old are you? ";
  std::getline( std::cin, user_input );
 
  // If the user entered anything except digits, find where
  // in the string. Notice how we create a temporary 'nondigit'
  // object to use as the test predicate.
  std::string::iterator error_iter =
    find_if( user_input.begin(), user_input.end(), nondigit() );
 
  // Now complain if he did, by showing him exactly where he
  // made his error.
  if (error_iter != user_input.end()) {
    std::cout << user_input << '\n'
              << std::string( error_iter -user_input.begin(), ' ' )
              << "^this is not a digit!\n";
    return 0;
    }
 
  return EXIT_SUCCESS;
  }

#include <algorithm>
#include <iostream>
#include <sstream>
#include <cctype>
 
// This is our function that returns true if c is not a digit
// in '0'..'9'.
bool nondigit( char c ) { return !isdigit( c ); }
 
int main() {
  std::string user_input;
 
  std::cout << "How many years old are you? ";
  std::getline( std::cin, user_input );
 
  // If the user entered anything except digits, find where
  // in the string.
  std::string::iterator error_iter =
    find_if( user_input.begin(), user_input.end(), nondigit );
 
  // Now complain if he did, by showing him exactly where he
  // made his error.
  if (error_iter != user_input.end()) {
    std::cout << user_input << '\n'
              << std::string( error_iter -user_input.begin(), ' ' )
              << "^this is not a digit!\n";
    return 0;
    }
 
  // Else convert it to an actual number
  int users_age;
  std::stringstream ss( user_input );
  ss >> users_age;
 
  std::cout << "So you are " << users_age << " years old.\n";
 
  return EXIT_SUCCESS;
  }

#include<iostream>
using namespace std;

int checkchar(char scores[4])
{

        int y = 0;
        int i=0;
        cin>>scores;
        while(scores[i]!='\0')  {
                if (((int) scores[i]<48) || ((int) scores[i]>57))       {
                        cout<<"The score is not a proper number \n";
                        return 1;
                }
                else
                        y = (int) scores[i] - 48 + y*10;              //to convert to integer
                i++;
        }


        return y;
}

getline( cin, s );
if (!isanumber( s )) { cout << "fooey!\n"; return; }
n = converttonumber( s )