C++ Array Merge

C++ Array Merge.cpp

template<typename T>
void array_merge(T* first1, T* first2, T* second1, T* second2, T* result){
    
    bool first_longest = (first2 -1 - first1) > (second2 -1 - second1);
    
    while((first1 != first2) &&  (second1 != second2)){
        if(*first1 < *second1)
            *result = *first1++;
        else
            *result = *second1++;
        ++result;
    }
    
    if(first_longest)
        std::copy(first1,first2,result);
    else
        std::copy(second1,second2,result);
    
}


void array_merge_exp(bool run){
    if(!run) return;
    
    int a[] = {1,2,3,4,5,6};
    int b[] = {2,3,3,10,11,12,17};
    
    int c[13];
    
    array_merge(a, &a[6], b, &b[7], c);
    cout << "Printing items" << endl;
    for(int i = 0; i < 12; i++){
        cout << c[i] << endl;
    }
    
}