Must be an array type but resolved to string

Question

I am getting the \"Must be an array type but it resolved to string\" error in my code. It also says that i (in the code below) cannot be resolved to a variable which I don\'

Answer 1

You cannot access a String's character using subscript (dna[i]). Use charAt instead:

dna.charAt(i) == 'c'

Also, "c" is a String, 'c' is a char.

One more thing - integer division ( e.g. int_a / int_b ) results in an int, and so you lose accuracy, instead - cast one of the ints to double:

double answer = count/(double)dna.length();