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/* zero out the unwanted characters */
for (i=18; i<SIZE; i++) {
croppedString[i] = '\0';
}
...

So what did you try with strtok()?
Post your attempt, and then we can tell you what you did wrong (so you learn).

> 2013-123-00:12:11 xxxxxxxxxxxxxxxxx
If you use " -" as the delimiter, then you...