0.43 convert to 43/100??

[hhkangyong]

umm.. stretching my head..
how to make the code to convert 0.43 to 43/100?
any expert can help me ??
thx alot..

[Banfa]

Sorry that question doesn't really make sense because you have left out data types.

0.43 = 43/100

there is no need for a conversion.

[rgb]

if you assume that input is a string, you can use a combination of:

strchr( ) function - http://www.cplusplus.com/ref/cstring/strchr.html
-- to locate the "."

strncpy( ) function - http://www.cplusplus.com/ref/cstring/strchr.html
-- to get string after "."

strlen( ) function - http://www.cplusplus.com/ref/cstring/strlen.html
-- to get how many "0" you want to use on denominator (multiple of 10s)

strcat( ) function - http://www.cplusplus.com/ref/cstring/strcat.html
-- to concatinate your final string (answer)

[D_C]

I'm not sure converting a decimal into a rational number can be done accurately. First, computers only store decimals to so much accuracy. Therefore, we can't necessarily know whether a number repeats or not. The computer stores in binary.

decimal 0.43 = binary 0.0110111000001 ...

In fact, in order for the decimal number to be a finite binary number, it must end with a five. Even then, it may not be stored accurately if the number is 0.1987651321949 865132168795, for example.

Otherwise, suppose the number input is binary 0.1101011001010 1
Then, convert this to 11010110010101/100000000000000 . Then calculate gcd(11010110010 101,10000000000 0000). Divide both 11010110010101 and 100000000000000 by the result, and that's the best you can do.

0.1101011001010 1 = (11010110010101/gcd(11010110010 101,10000000000 0000)/(10000000000000 0/gcd(11010110010 101,10000000000 0000))