Chapter 8, Problem 8PP

Program Plan Intro

Sum of Numbers in a String

Program plan:

Design the form:

• Place two label box controls on the form, and change its name and properties.
• Place one text box control on the form, and change its name and properties to get the string from user.
• Place one command button control on the form, and change its name and properties to calculate the sum of numbers and display it into label box.

In code window, write the code:

Program.cs:

• Include the required libraries.
• Define the namespace “SumNum”.
  • Define a class “Program”.
    • Define a constructor for the class.
    • Define required functions to run “Form1”.

Form1.cs:

• Include the required libraries.
• Define namespace “SumNum”.
  • Define a class “Form1”.
  • In btnCalculate() method,
    • Declare the required variables.
    • Spilt the delimiter.
    • Calculate the sum of numbers in a given string.
    • Display the total in a label box.
  • Close the application.

Form Design:

View the Form Design in IDE.

Set the Form Control properties in Properties window as follows:

Object	Property	Setting
Form1	Text	Program8_8
label1	Text	Enter a string:
textBox1	Text	(Empty)
lblResult	Text	(Empty)
btnCalculate	Text	Calculate

• Add two label box controls to the form from Toolbox.
• Add one text box control to the form from Toolbox.
• Add one command button control to the form from Toolbox.