SUVAT calculator [C++]

//Made to test out g++ in Arch, not tested extensively
#include <iostream>
#include <stdio.h>
#include <math.h>
using namespace std;

int main ()
{

int S,U,V,A,T,Unknown,Temp,Sknown,Uknown,Vknown,Aknown,Tknown,Sfigureable, Ufigureable, Vfigureable, Afigureable, Tfigureable = 0;

cout << "SUVAT - S = Displacement (Fancy for distance), U = Initial Velocity (Almost always zero), V = Final velocity, A = Acceleration (~10m/s due to gravity), T = time..\n";

cout << "Is S known? (0 = No, 1 = Yes)\n";
cin >> Sknown;

cout << "\nIs U known? \n";
cin >> Uknown;

cout << "\nIs V known? \n";
cin >> Vknown;

cout << "\nIs A known? \n";
cin >> Aknown;

cout << "\nIs T known? \n";
cin >> Tknown;

cout << "Calculating what is figurable...\n";

if (Uknown, Tknown, Aknown == 1 || Uknown, Vknown, Tknown == 1)
Sfigureable = 1;

if (Vknown, Aknown, Tknown == 1)
{
Ufigureable = 1;
Vfigureable = 1;
}

if (Uknown, Aknown, Sknown == 1)
Vfigureable = 1;

if (Vknown, Uknown, Tknown == 1)
Afigureable = 1;

if (Vknown, Aknown, Uknown == 1)
Tfigureable = 1;

if (Sknown == 1)
Sfigureable = 0;

if (Uknown == 1)
Ufigureable = 0;

if (Vknown == 1)
Vfigureable = 0;

if (Aknown == 1)
Afigureable = 0;

if (Tknown == 1)
Tfigureable = 0;

if (Sfigureable == 1)
cout << "S is figurable!\n";
else if (Sknown == 1)
cout << "S is already known!\n";
else cout << "S is not figurable / already known!\n";

if (Ufigureable == 1)
cout << "U is figurable!\n";
else if (Uknown == 1)
cout << "U is already known!\n";
else cout << "U is not figurable / already known!\n";

if (Vfigureable == 1)
cout << "V is figurable!\n";
else if (Vknown == 1)
cout << "V is already known!\n";
else cout << "V is not figurable / already known!\n";

if (Afigureable == 1)
cout << "A is figurable!\n";
else if (Aknown == 1)
cout << "A is already known!\n";
else cout << "A is not figurable / already known!\n";

if (Tfigureable == 1)
cout << "T is figurable!\n";
else if (Tknown == 1)
cout << "T is already known!\n";
else cout << "T is not figurable! / already known!\n";

if (Sknown == 1)
{
cout << "S = ";
cin >> S;
cout << "\n";
}

if (Uknown == 1)
{
    cout << "U = ";
    cin >> U;
    cout << "\n";
}

if (Vknown == 1)
{
    cout << "V = ";
    cin >> V;
    cout << "\n";
}

if (Aknown == 1)
{
    cout << "A = ";
    cin >> A;
    cout << "\n";
}

if (Tknown == 1)
{
    cout << "T = ";
    cin >> T;
    cout << "\n";
}


if (Sfigureable == 1)
{
    if (Aknown == 1)
    S = U*T + 0.5*A*(T*T);

    else S = 0.5*(U+V)*T;
}

if (Ufigureable == 1)
U = V - A*T;


if (Vfigureable == 1)
{
    if (Tknown == 1)
    V = U + A*T;

    else  V = sqrt(U^2 + 2*A*S);
}

if (Afigureable == 1)
A = (V-U)/T;

if (Tfigureable == 1)
T = (V-U)/A;

cout << "S: ";
if (Sknown == 1)
cout << S << " - ";
if (Sfigureable == 0)
cout << "Not figured!\n";
else cout << S << "\n";

cout << "U: ";
if (Uknown == 1)
cout << U << " - ";
if (Ufigureable == 0)
cout << "Not figured!\n";
else cout << U << "\n";

cout << "V: ";
if (Vknown == 1)
cout << V << " - ";
if (Vfigureable == 0)
cout << "Not figured!\n";
else cout << V << "\n";

cout << "A: ";
if (Aknown == 1)
cout << A << " - ";
if (Afigureable == 0)
cout << "Not figured!\n";
else cout << A << "\n";

cout << "T: ";
if (Tknown == 1)
cout << T << " - ";
if (Tfigureable == 0)
cout << "Not figured!\n";
else cout << T << "\n";

return 0;
}
/*
U = V - AT
T = (V-U)/A
A = (V-U)/T
*/