String Manipulation Question no. 1

For example i have this string

"peice"

I will need to convert each vowel into a numeric form, what i mean is it's location in the alphabet example.

a = 1 , e = 5 , i = 9 , o = 15 , u = 21

so

"p59c5"

my idea is to convert it into its ascii decimal value and convert it back to string

a will be 97 then i will subtract it to a constant number which is 96

a = 97 - 96 = 1

e = 101 - 96 = 5

i = 105 - 96 = 9

and so forth...

do you think my idea is reasonable?

will i need to use strcat to do something like this

1.if its not a vowel store the character in a temporary string
2.if the next character is a vowel then concatenate it with the temporary string array
3. finally overwrite the original string with the temporary string

How will you decide whether "15" means
- itself, namely "15"
- the two letter pair "ae"
- the single letter "o"

take this as an example...

return = r5t21rn

Take this example

aerate -> 15r1t5
orate -> 15r1t5

How do you get back the original?

Is that important?

Apart from teh obvious flaws already pointed out:

rather than


I am not sure why you need to do this, but I suggest using a fixed length field (i.e. two) for the vowel coded eg. 'a' = "01". If the input string can never contain digits, then you can assume that any digit pair in the output is a vowel. If the input can itseld fontain digits you will need to be cleverer, and use some sort of preceeding escape sequence.

BTW ... i before e except after c....

it is not important to bring it back