In this tutorials will teach how to make a calculator in C#.net windows form application step by step. How to create the calculator in C#.net application in best coding practice.
string CalTotal; int num1; int num2; string option; int result;
private void btn1_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "1"; } private void btn2_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "2"; } private void btn3_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "3"; } private void btn4_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "4"; } private void btn5_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "5"; } private void btn6_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "6"; } private void btn7_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "7"; } private void btn8_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "8"; } private void btn9_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "9"; } private void btn0_Click(object sender, EventArgs e) { txtTotal.Text = txtTotal.Text + "0"; }
private void btnPlus_Click(object sender, EventArgs e) { option = "+"; num1 = int.Parse(txtTotal.Text); txtTotal.Clear(); } private void btnMin_Click(object sender, EventArgs e) { option = "-"; num1 = int.Parse(txtTotal.Text); txtTotal.Clear(); } private void btnMul_Click(object sender, EventArgs e) { option = "*"; num1 = int.Parse(txtTotal.Text); txtTotal.Clear(); } private void btnDiv_Click(object sender, EventArgs e) { option = "/"; num1 = int.Parse(txtTotal.Text); txtTotal.Clear(); }
private void btnEql_Click(object sender, EventArgs e) { num2 = int.Parse(txtTotal.Text); if (option.Equals("+")) result = num1 + num2; if (option.Equals("-")) result = num1 - num2; if (option.Equals("*")) result = num1 * num2; if (option.Equals("/")) result = num1 / num2; txtTotal.Text = result + ""; }
private void btnClear_Click(object sender, EventArgs e) { txtTotal.Clear(); result = (0); num1 = (0); num2 = (0); }
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