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How do you convert a number to a binary literal in Visual Basic. How do you convert a binary literal to a number in Visual Basic. A suggested answer is given in the following simple windows form program. This page has 4 sections:.
This program will convert a number from 0 - into a text representation of the binary equivalent a binary literal. For example, entering will produce The program will also convert a binary literal to its equivalent decimal number.
If you enter it will display The functions that do the conversion are: There are two versions of the code presented. The first contains extensive comments that hopefully explain what is going on and how the code works. The second version is the same except the comments have been removed for brevity. Any recent version - should work. Feel free to change the text of the labels and buttons to whatever you want. As you create the controls it can be a good idea to give the controls more meaningful names.
If you do this remember to changes the control names in the code. Simply copy and paste it from below. The first version of the code is heavily commented below is a version without the comments. This is the binary literal. The function then works through the string one character at a time taking the character at position i in the string i is the loop counter. It converts each character into a number - an integer 1 or Bitshifting means that all the digits in the byte are moved or shifted one place to the left.
The code in red above does this. Lets take the literal 1. The function will take the '1' at the far right and convert it to a number 1. This number 1 is then stored in a variable of type Byte. The byte for 1 contains the bits - As the is converted to a byte is is 'bitshifted' by Math. First time through the loop the counter is 7 so Math. It is bitshifted by 0 places - it doesn't move this time! The byte still contains The tempByte which is currently 0 is then OR 'd with this The second time through the loop the counter, i, is 6 and its inverse is 1.
The function therefore takes the 6th character from the literal 0 1. The 0 produces a byte containing This is shifted by 1 place to the left which makes no difference! This is then OR'd with the tempByte which is now The third time through the loop the counter, i, is 5 and its inverse is 2. The function therefore takes the 5th character of from the literal 1 0 1. The 1 produces a byte containing This is shifted 2 places to the left and is now This is then Or'd with the tempByte which is now The function continues taking each character in turn, converting it to a 1 or 0 and ORing this with the tempByte.
In essence it is simply putting a 1 or 0 in the same place in the tempByte as a "1" or "0" appears in the binary literal. The tempByte in our example ends up being 1. But this is exactly what we started off with you might say. Well yes but we started with a string of 8 "1"s or "0"s and have ended up with 8 bits of either 1 or 0. Visual Basic sees bytes as numbers. We can now display the byte as number in this case This number is converted to a byte and stored in byteToConvert.
The functions then loops 8 times. The loop counter counts down from 7 to 0. Each time through the loop the a byte containing the bits the decimal number 1 is bit shifted moved to the left by the same value as the loop counter i.
It is if the bit at postion i in the byteToConvert is a 1. It is if the bit at position i of the byteToConvert is a 0. Each time through the loop tempByte is tested and if it contains a "1" is appended to a text string. If tempByte contains a "0" is appended to the text string result. At the end of the loop a text string of 8 characters is created. It has "1"s and "0"s in the same position as the 1s and 0s in the byte we started with.
For example lets take the number Convert it to a byte and the bits in that byte are: This is our byteToConvert. Lets follow it through our function loop:. They can, however, be very useful when you wish to manipulte the bits within a byte. To convert between numbers and binary literals or to use the bits as flags.
I created the functions above to help me process numbers and binary literals before sending and receiving them via a serial port to various PIC and Arduino microcontroller projects I'm working on. Being able to convert between numbers and literals is very useful when you want to control the exact 1's and 0's you send. Bitwise operation - Wikipedia page on Bitwise operations. Please feel free to use this code in your programs for non commercial use only.
Please acknowledge any uses. This page has 4 sections: What the program does - Brief introduction Bytes and Bits program - Full code for the program Short non-commented version of the code - Same code but without the comments How it works - explanation of the two main functions What the program does This program will convert a number from 0 - into a text representation of the binary equivalent a binary literal.
Object, ByVal e As System. Text Then ' It does Text Else ' It doen't Show "Enter a valid number" TextBox1. Focus Exit Sub End If 'Is the number within an acceptable range 'in this case 0 - as we are only 'using 8 bit bytes eg. Show "Enter a number between 0 and " TextBox1.
Length 'Check to make sure they have only entered '8 characters If binStringLength 8 Then 'less or more than 8 characters 'warn the user and exit the sub MessageBox. Warn user and exit sub MessageBox.