Check if L3 is hypotenuse C++ (pythagorean-theorem)

#include "stdafx.h"//used for Visual Studio Prebuilt header
#include <stdio.h>//used for getline
#include <cmath>//used for pow //pow == Power to a # ->> Used for the function:// http://www.virtualnerd.com/algebra-1/radical-expressions-equations/pythagorean-theorem/pythagorean-theorem-examples/pythagorean-theorem-definition

int _tmain(int argc, _TCHAR* argv[])
{
    int L1 ;
        int L2 ;
        int L3;
        string L1s;
    while (true)
    {
        system("color 0a");
        cout<<"Please input length of triangle side 1: ";
        cin >> L1;
        cout<<"Please input length of triangle side 2: ";
        cin >> L2;
        cout<<"Please input length of triangle side 3: ";
        cin >> L3;
        if(L1 < L3 && L2 <L3)/*checks if the two angles that make up the triangle are less than the L3 angle == L3 is the hypotenuse.*/
        {
            int L1pyh = pow(L1, 2);
            int L2pyh = pow(L2, 2);
            int L3pyh = pow(L3, 2);
            if(L1pyh + L2pyh == L3pyh) //pythagorean-theorem
            {
                cout<<true<<endl;;
                getline(cin, L1s);
            }
            else
            {
                system("color 0e");
                cout<<false<<endl;;
                getline(cin, L1s);
            }
        }
        else
        {
            system("color 0");
            cout<<"Not a right angle triangle!\n";
            system("cls");
        }
        cout<<" ";
        getline(cin, L1s);
        system("color 0f");
        cout<<"Credits: BaSs_HaXoR";
        getline(cin, L1s);
        system("cls");