Initialization and passing an array

Here's a simple (perhaps unsafe but then again don't use std::cin for safety) implementation that seems to work for reading in the numbers:

#include <iostream>
#include <list>
#include <sstream>
int main()
{
    std::cout << "Input numbers: ";
    // get input line
    std::string input;
    std::getline(std::cin, input);
    std::stringstream ss(input);
    // read numbers
    std::list<int> numbers;
    while(ss) {
        int number;
        ss >> number;
        ss.ignore();
        numbers.push_back(number);
    }
    // display input
    for(const auto number: numbers) {
        std::cout << number << std::endl;
    }
    return 0;
}

And here's a sample run:

$ ./a.out
Input numbers: 1 2 3 4
1
2
3
4

I think you need a parse to decode the input. something like following:

void parse(const std::string& input, int output[], int MaxNum)
{
    // parse the integer from the string to output.
}

int main(){
    ......
    std::string input;
    cout << "Enter numbers for the chart" << endl;
    cin >> input;
    parse(input, chart, MAX);
    ......
}

Here is a version of a program that lets you input a series of numbers with only one cin line with the help of stringstream, but the only difference is that it stores the input in a vector. It then draws a histogram chart based on the input.

Just press the <ENTER> key twice to let the program know that you are done with the inputting of the numbers.

#include <iostream>
#include <iterator>
#include <vector>
#include <algorithm>
#include <sstream>
using namespace std;

vector<int> Vector;
string line;

void drawchart(int max);


int main() {

    cout<<"Chart drawing program ( Histogram) \n";
    cout<<"Enter a series of numbers. \n";
    cout<<"Seperate with a space, press <ENTER> TWICE to end input \n";
    cout<<" (e.g  2 3 4 5 6)  >  ";

    if(!getline(cin, line)) return 1;
    istringstream iss(line);

    copy( istream_iterator<int>(iss), istream_iterator<int>(),  back_inserter(Vector));

    copy(Vector.begin(), Vector.end(), ostream_iterator<int>(cout, ", "));

    cout<<"\nDrawing chart.. \n\n";

    drawchart( Vector.size() );


    cout<<"Press ANY key to close.\n\n";    
    cin.ignore();cin.get();

return 0;
}

// draws a chart or hjistogram
void drawchart(int max){
    for( int i = 0; i < max ; i++){
        for(int j = 0; j < Vector[i]; j++)  cout << "*";
        cout << endl;
    }
}