hi, im male, 16 years old been going to gym to work out my upper body for about a year now.. Im just now into getting abs more then getting bigger arms now lol..

i have basically started a kind of diet consisting of:
1. Up n go (small size) in the morning for breakfast
2. cheese, ham and tomato sandwich for lunch
3.Carrorts, salad, fruit( Apple,nectrin,peachs ) for snacks
4. Ussual just have carrorts and salad for dinner some times, else i eat meat for dinner..

Exercise:
- gym for upper body
- ab work out ussually 20 mins worth

just wondering if im eating the right stuff to loose weight, if i'm not or to make my diet better please make suggestions

any particular reason why you do no other stregth training excersises (legs, back, etc?)