caculator

Question

Hello,

i wrote a code for calculating user input,

when ever the user input two "1+2=3"

the result is "3" which is correct .

When the then user want to use that same result to

get another result "+ 5"=8,

but the result will be =6. which is wrong.

so can someone help me out here please

Thanks.

double Operand=0;

String currentOp="";

double operand2=0;

bool iscurrentOperand;

private void btnNumeric_Click(object sender,EventArgs e)

{

Button button=(Button)sender;

txtSow.Text+=button.Text;

iscurrentOp=true;

}

private void btnOperations_Click(object sender,EventArgs e)

{

Button button=(Button)sender;

if (Operand!=0){

operand2=double.Parse(txtSow.Text);

iscurrentOp=true;

switch(currentOp){

case "+":

txtSow.Text=(Operand + operand2).ToString();

break;

case "-":

txtSow.Text=(Operand- operand2).ToString();

break;

case "*":

txtSow.Text=(Operand * operand2).ToString();

break;

}

}

else{

currentOp=button.Text

Operand=Convert.ToDouble(txtSow.Text);

iscurrentOp=true;

}

}

private void btnEqual_Click(object sender,EventArgs e)

{

switch(currentOp)

{

case "+"

txtSow.Text=(Operand + double.Parse(txSow.Text)).ToString();

break;

case "-"

txtSow.Text=(Operand - double.Parse(txSow.Text)).ToString();

break;

case "*"

txtSow.Text=(Operand * double.Parse(txSow.Text)).ToString();

break;

case "/"

txtSow.Text=(Operand / double.Parse(txSow.Text)).ToString();

break;

}

}

}

}

}