Problem: DNA-1, CGTA counting

Problem Statement

Given a strand of DNA determine the number of cytosine nucleotides present in the genome. The strand is represented by a string containing only the lowercase characters 'c', 'g', 't', and 'a'. Your method should return the number of occurrences of 'c' (cytosine) in the genome.

Definition

Class: DNAprofile
Method: count
Parameters: String
Returns: int
Method signature:
```
  int count(String dna)
```
(be sure your method is public)

Class
public class DNAprofile { public int count(String dna) { // fill in code here } }
Constraints
- The String dna contains only the characters 'a', 'g', 't', 'c' (lowercase).
- The String dna is between 0 and 1000 characters long (inclusive).
Examples
1. ```
"agatatat"
```
  Returns: 0
  There are no occurrences of cytosine, so return zero.
2. ```
"catatatatc"
```
  Returns: 2
Owen L. Astrachan
Last modified: Wed Oct 4 14:36:22 EDT 2006

Problem: DNA-1, CGTA counting

Problem Statement

Definition

Class

Constraints

Examples