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Displaying Fractions
- Thread starter CrashDome
- Start date
One approach would be to have them enter the data as a string, and then search the string for a "slash" character. Everything before the slash is assumed to be the numerator, everything afterwards becomes the denominator. You'd then convert each to integers and do the math, storing the result in a double.
Error handling could be a bit tricky - you'd have to catch the jokers who enter stuff like "1/0", "2/-3", ".4/10", etc.
Chip H.
Error handling could be a bit tricky - you'd have to catch the jokers who enter stuff like "1/0", "2/-3", ".4/10", etc.
Chip H.
- Thread starter
- #3
I thought of that, but decided it was too much managing for a simple number.
Instead I have three numeric controls (the old fashioned way) one for Whole Num, one for Numerator, and one for Denominator. For any text boxes that only display the number I put in a quick function that rounds the number to the nearest 64th (dealing in inches and we never go below a 64th) and shows the appropriate fraction.
Both the way I handled it and your suggestion are very loose and I should probably build a custom control that accounts for all possibilties. However, I envy non-American Standard industries and other nations as decimals are much MUCH easier for them to convert (e.g. millimeters, centimeters,etc..). I guess that goes to show that stubborness CAN come back around and bite ya in the rear!
Instead I have three numeric controls (the old fashioned way) one for Whole Num, one for Numerator, and one for Denominator. For any text boxes that only display the number I put in a quick function that rounds the number to the nearest 64th (dealing in inches and we never go below a 64th) and shows the appropriate fraction.
Both the way I handled it and your suggestion are very loose and I should probably build a custom control that accounts for all possibilties. However, I envy non-American Standard industries and other nations as decimals are much MUCH easier for them to convert (e.g. millimeters, centimeters,etc..). I guess that goes to show that stubborness CAN come back around and bite ya in the rear!
if you want to turn a decimal into a fraction then try this:
1) take the decimal (d) and count its decimal places
. d = 0.3168, n = 4. (you can just set n to something that is pleanty large enough if you want).
2) create a fraction thus - d*(10^n)/10^n. 3168/10000.
3) find the Highest Common Multiple of the numerator and the denominator. to do this you will need a for loop (i) that goes from 1 to the ceiling of the square root of the numerator (you're not going to find a hcm hgher than this, assuming d<=1). test each number by dividing both the numerator and the denominator by i; if both results are whole numbers, then you have found a common multiple - the last one you find will be the highest.
4) divide top and bottom by the hcm. 198/625, perhaps.
1) take the decimal (d) and count its decimal places
. d = 0.3168, n = 4. (you can just set n to something that is pleanty large enough if you want).2) create a fraction thus - d*(10^n)/10^n. 3168/10000.
3) find the Highest Common Multiple of the numerator and the denominator. to do this you will need a for loop (i) that goes from 1 to the ceiling of the square root of the numerator (you're not going to find a hcm hgher than this, assuming d<=1). test each number by dividing both the numerator and the denominator by i; if both results are whole numbers, then you have found a common multiple - the last one you find will be the highest.
4) divide top and bottom by the hcm. 198/625, perhaps.
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