private static double CalcProp(double?A, double?B, double?C, double?D)
{
ErrorMessage = "";
double X = 0;
if (A == null)
{
if (D == 0)
{
ErrorMessage = "Divide by zero!";
DrawFormula.SetStrings(B.ToString(), C.ToString(), D.ToString(), "0");
return(0);
}
X = (double)((B * C) / D);
DrawFormula.SetStrings(B.ToString(), C.ToString(), D.ToString(), X.ToString());
return(X);
}
if (B == null)
{
if (C == 0)
{
ErrorMessage = "Divide by zero!";
DrawFormula.SetStrings(A.ToString(), D.ToString(), C.ToString(), "0");
return(0);
}
X = (double)((A * D) / C);
DrawFormula.SetStrings(A.ToString(), D.ToString(), C.ToString(), X.ToString());
return(X);
}
if (C == null)
{
if (B == 0)
{
ErrorMessage = "Divide by zero!";
DrawFormula.SetStrings(A.ToString(), D.ToString(), B.ToString(), "0");
return(0);
}
X = (double)((A * D) / B);
DrawFormula.SetStrings(A.ToString(), D.ToString(), B.ToString(), X.ToString());
return(X);
}
if (D == null)
{
if (A == 0)
{
ErrorMessage = "Divide by zero!";
DrawFormula.SetStrings(B.ToString(), C.ToString(), A.ToString(), "0");
return(0);
}
X = (double)((B * C) / A);
DrawFormula.SetStrings(B.ToString(), C.ToString(), A.ToString(), X.ToString());
return(X);
}
return(0);
}
private void frmMain_Load(object sender, EventArgs e)
{
chkXD.Checked = true;
DrawFormula.pbDraw = pbDrawFormula;
DrawFormula.InitGraph();
HideScheme();
}