#include <iostream>
#include <cmath>
#include <cstdlib>
#include <iomanip>

using namespace std;

void ab();
void c();

int main()
{
    for(;;){
    cout << "Pythagoras Calculator - By Colin Berry\n";
    cout << "A or B - 1\n";
    cout << "C - 2\n";
    cout << "Quit - 99\n";
    int ans;
    cin >> ans;
    switch(ans){
        case 1:
            ab();
            break;
        case 2:
            c();
            break;
        case 99:
            return 1;
    }
    }
}
void ab(){
    cout << "Enter value of C\n";
    double c;
    cin >> c;
    cout << "Enter value of A/B\n";
    double a;
    cin >> a;
    double d;
    double end;
    a = a*a;
    c = c*c;
    d = c - a;
    end = sqrt(d);
    cout << "Line is " << setprecision(2) << fixed << end << endl;
    system("PAUSE");
}
void c(){
    cout << "Enter value of A\n";
    double a;
    cin >> a;
    cout << "Enter value of B\n";
    double b;
    cin >> b;
    double c;
    double end;
    a = a*a;
    b = b*b;
    c = a + b;
    end = sqrt(c);
    cout << "Line C is " << setprecision(2) << fixed << end << endl;
    system("PAUSE");
}