How can I run all over dynamic array? [closed]

I have dynamic array with unknown size, and I need to compare a name of random object in the array, to string that I'm getting from the user, that's mean I need to run all over the array and compare the the string that I have to all the objects in the array. I really don't know how to do this. and idea? I need to run all over files and find some object.

class Folder : public ADFile
{
    ADFile** files;
    int arrSize;
    string filePath;
    static Folder*(root);
public:
void addFileToArray(ADFile *);

}

class ADFile
{
    string fileName;
    tm *lastUpdateTime;
}

void Folder::addFileToArray(ADFile *f)
{
    int i;
    if (arrSize == 0)
    {
        files = new ADFile*[1];
        files[0] = f;
        arrSize++;
    }
    else
    {
        ADFile** temp = new ADFile*[arrSize + 1];
        for (i = 0; i < arrSize; i++)
            temp[i] = files[i];
        temp[i] = f;
        files = temp;
        arrSize++;
    }
}