Question

I have a function which accepts some values as char array[] parameters.

These values are separated with semicolons (';').

For example: "hello;dear;John"

So I’m trying to figure out a way by using strtok to delete the last string, which is "John" after the last semicolon.

int remove(char lastName[]){


}

*To be more specific

I have created this function which removes values separated by semicolons:

int remove(char variable_Name[]){

        char *value_toRemove = getenv(variable_Name);
        char last_semicolon[] = ";";
        char *result = NULL;
        result = strtok( value_toRemove, last_semicolon );
        while( result != NULL ) {
        result = strtok( NULL, last_semicolon );
        }
        return NULL;    
}

But the function deletes everything after it finds a semicolon.

Answer 1

strrchr will find the last occurance of the character.

Sor if you don’t mind modifyint the original string then it should be as simple as

int remove(char *lastName){
   char *pos = strrchr(lastName, ';');
   if (pos) {
      *pos = 0;
      return pos-lastName;
   }
   return 0;
}

Man Page here