My program counts the occurrence of each digit from 0 to 9 in a string. It seems to me that i have done everything correctly, but a problem still persists.

int main(){
    string word = "23456745";
    int* ReturnArray = count(word);

    for(int i =0; i < 10; i++){
        cout << i << ": " <<  ReturnArray[i] << " \n";
    }

    delete [] ReturnArray;

    return 0;
}

int* count(const string& s){
    int length = s.length();
    int* array = new int(10);
    int counter =0;

    for(int j = 0 ; j < 10 ; j++) {
        for(int i = 0 ; i < length ; i++) {
            char character = s[i];
            int value = static_cast<int>(character -'0');
            if(value == j)
                counter++;
        }
        array[j] = counter;
        counter = 0;
    }
    return array;
}