C :: Splitting String And Copying It Over To A Struct

I'm having trouble with this code. What I'm trying to do is to read a line from a file and cut that line into two pieces, one is the keyword and the other is the definition. I want to read up to when there is a dash and assign that line to key and then assign the rest of the line to def. After that I copy key to the struct DictEntries.key and def to DictEntries.def. The output of this shows only the definition for both DictEntries.key and DictEntries.def but if I use "puts(key);" I see the keyword.

Code:

while(!feof(dictionary))
{
char line[200];
char *key,*def;
fgets(line,sizeof(line),dictionary);
key = strtok(line,"-");
}

[code]....