01 DEC 1704. Determine if String Halves Are Alike

class Solution {
public:
bool isVowel(char c){
        if(c=='a' || c=='A' || c=='e' || c=='E' || c=='i' || c=='I' || c=='o' || c=='O' || c=='u' || c== 'U')
            return true;
        return false;
    }
    bool halvesAreAlike(string s) {
        int l=s.length();
        int c1=0,c2=0;
        for(int i=0; i<l/2; ++i){
            if(isVowel(s[i])) ++c1;
        }
        for(int i=l/2; i<l; ++i){
            if(isVowel(s[i])) ++c2;
        }
        return c1==c2;
    }
};