Question

I have a struc like this:

struct process {int PID;int myMemory[];};

however, when I try to use it

process p;
int memory[2];
p.myMemory = memory;

I get an criptic error from eclipse saying int[0] is not compatible with int[2];

what am i doing wrong?

Thanks!

Answer 1

Don’t use static arrays, malloc, or even new if you’re using C++. Use std::vector which will ensure correct memory management.

#include <vector>
struct Process {
    int pid;
    std::vector<int> myMemory;
};

Process p;
p.reserve(2); // allocates enough space on the heap to store 2 ints
p.myMemory.push_back( 4815 ); // add an index-zero element of 4815
p.myMemory.push_back( 162342 ); // add an index-one element of 162342

I might also suggest creating a constructor so that pid does not initially have an undefined value:

struct Process {
    Process() : pid(-1), myMemory() {
    }
    int pid;
    std::vector<int> myMemory;
};