bluelightnin6 is right.
Nothing to do with starter, one without knowing cars much can tell, unless it is a design for both starter and alternator (generator).
If the charging circuitry is in good shape, it will be the alternator, w/o current generated from the alternator, your car draws current from the battery until it goes flat.
My damn GM cavalier got me replaced alternator twice within 6 months because the damn Delphi supplied crap alternators. To buy one is relatively cheap (not really cheap) but to install w/o tools, you can release the tension arm that let the belt runs thru. My damn cavalier gave me a lot of problems and costed me much good money after this bad stuff...., I just return home with it on a 2nd coolant temperature sensor replaced, it is one of the culprits that caused NO START immediately after use.