operation on files, replace data in C

[KrisKris]

Hi,
I have written a program in C to copy data from input file to output file and is works. Now I want to replace some data from input file before the data will be written to output file. see piece of code bellow
[CODE]
if (i == '¿')
{
i = ('z');
}
else if (i == '³')
{
i = ('l');
}
else if (i == 'œ')
{
i = ('s');
}
[/CODE}
and so on. unfortunately it is not works.
Do you have any idea why the program do not recognize the strange signs from input text file? I tried change for example a to A or s to 4 and it works perfect.
or maybe you have other way to replace the strange symbols.
many thanks for help.
Kris

[johny10151981]

are those character is ascii table?

If it is UTF-8 or UNICODE then you will have to change your approach a little

[KrisKris]

Hi Johny,
I not sure about ascii table.
there are letters from different language then English.
I have OS in English so when I try to use the text file some characters a displayed as above.
thanks

[donbock]

The C Standard says the following in regard to character constants:

the elements of the sequence [the character(s) within the single quotes] are any members of the source character set; they are mapped in an implementation-defined manner to members of the execution character set

I suppose there is an incompatibility between how your compiler represents those special characters and how they are represented in the file. Do you any documentation for the text file format?

[KrisKris]

Hi donbock,
Thanks for your reply.
I do not have any documentations for the text file.
the file is a subtitles for movie. format .txt
thanks