find the largest value in c++

largest_so_far.cpp

#include "stdafx.h"
#include <iostream>

using namespace std;

int main() {
    int itemValue;
    int largestSoFar;
    int minValue;

    minValue = -200000000;
    largestSoFar = minValue;

    cout << "Finding the largest value..." << endl;
    do {
        cout << "Enter an integer (or " << minValue << " to stop): ";
        cin >> itemValue;
        if(itemValue > largestSoFar){
            largestSoFar = itemValue;
        }
    } while(itemValue != minValue);
    cout << "The largest value: " << largestSoFar << endl;

    system("pause");
    return 0;
}