C - subtracting a string from another

Question

Using ftw() function, I have a list of paths I want to write on a file. I need only paths starting from a specified folder, like:

source folder: /Users/me
subfolder1:    /Users/me/school
subfolder2:    /Users/me/school/english

result I need: /school  
               /school/english

Is there a way to "subtract" one string from another, in the way i explained above? I know there is strtok() function, but i don't know if it works with more than one char at a time.

Thanks.

Answer 1

如果您确定前缀在其中，请跳过它：

char *result = subfolder + strlen(source);