online_music_store_exercise

For your birthday, you received a $10 gift certificate for an online music store. You can buy songs until your money is gone.

A sample output looks like the following:
Enter the cost of the song, ($0.99, $1.99, or $2.99): 0.99
Your remaining balance is: 9.01
Enter the cost of the song, ($0.99, $1.99, or $2.99): 1.99
Your remaining balance is: 7.02
Enter the cost of the song, ($0.99, $1.99, or $2.99): 2.99
Your remaining balance is: 4.03
Enter the cost of the song, ($0.99, $1.99, or $2.99): 1.99
Your remaining balance is: 2.04
Enter the cost of the song, ($0.99, $1.99, or $2.99): 2.99
your choice is too expensive!!!  Choose another one please!
Your remaining balance is: 2.04
Enter the cost of the song, ($0.99, $1.99, or $2.99): 0.99
Your remaining balance is: 1.05
Enter the cost of the song, ($0.99, $1.99, or $2.99): 1.99
your choice is too expensive!!!  Choose another one please!
Your remaining balance is: 1.05
Enter the cost of the song, ($0.99, $1.99, or $2.99): 0.99
Your remaining balance is: 0.06
Sorry, your balance is $0.06. You can not buy more songs.

Please note: