VISUAL C++ PROGRAMMING: CONCEPTS AND PROJECTS Chapter 3B Integral Data (Tutorial)

VISUAL C++ PROGRAMMING: CONCEPTS AND PROJECTS

Chapter 3BIntegral Data (Tutorial)

Tutorial: Binary Conversion Program

Visual C++ Programming

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Problem Analysis Construct a program that allows the user to

enter a character and see its decimal (base-10) and binary (base-2) representations

For example, if the user entered the letter ‘A’ Its binary representation 01000001 is displayed Its decimal representation 65 is displayed


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Problem Description


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The ASCII code of the letter is a base-10 integer – no explicit conversion required!

To calculate the binary representation Start with the largest binary place value

(128) Determine how many whole times the place

value goes into the integer in question (using integer division)

Display the result Capture the remainder (using mod)


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Design


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Interface sketch requires numerous textboxes Data entry (txtChar) Data output

Eight textboxes for the binary digits One textbox (txtDec) for the decimal version

Control table Data table Algorithm for the button (btnConvert)


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Development


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Create the interface Create, resize and position multiple

textboxes Set MaxLength property to 1 for txtChar Set horizontal spacing Add labels Change ForeColor and BackColor Assign names to match interface design Add a textbox for instructions

(txtInstruct)


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Development (continued)


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Code Form1_Load() event handler Code btnConvert_Click()

Assign first character in txtChar to variable Assign character to an integer variable and

display Display groups of 128 Calculate remainder Display other place values


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Testing


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Demonstrate that your program works with A-Z characters a-z characters 0-9 numerals Punctuation marks and special characters

Use the ASCII table in Appendix B to verify correctness


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On Your Own


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Demonstrate your understanding Create a diagram like Figure 3-28 to show

how your program works with various decimal numbers

Replace ToString() with Convert::ToString()

Use shorthand operators /= %=

VISUAL C++ PROGRAMMING: CONCEPTS AND PROJECTS Chapter 3B Integral Data (Tutorial)

Documents

binary base

decimal base

largest binary place

integer divisiondisplay

integer variable

variableassign character

interface sketch

code form1