Question

I want to do something like the snippet below:

using namespace std;

struct str {
    int *integs;
};

void allocator(str*& str1) {str1.integs=new int[2];}
void destructor(str*& str1) {delete [] str1.integs;}

int main () {

    str str1;
    allocator(str1);
    str1.integs[0]=4;
    destructor(str1);
    return 0;
}

However this doesn’t work; I get error: request for member ‘integs’ in ‘str1’, which is of non-class type ‘str’*

Is this impossible to do with struct and I need a class? Do I have to use the -> operator somehow? Thoughts?

Answer 1

You’re taking str1 as a reference to a pointer. You probably meant:

void allocator(str& str1) {str1.integs=new int[2];}
void destructor(str& str1) {delete [] str1.integs;}