C ++ Error: variable-sized object may not be initialized?

Asked Mar 24 '18 at 21:53

Active Mar 24 '18 at 22:00

Viewed 1,167 times

I have been trying to figure out why i'm getting an initialization error:

int size = polygons[polyID].n;
    Clipper clipper = Clipper();
    Vertex tmp[50];
    size = clipper.clipPolygon(polygons[polyID].n, polygons[polyID].p, tmp, CWll, CWur);
    int x[size] = {};
    int y[size] = {};

and the error I am getting is:

Pipeline.cpp:89:8: error: variable-sized object may not be initialized
        int x[size] = {};
              ^~~~
Pipeline.cpp:90:8: error: variable-sized object may not be initialized
        int y[size] = {};

Does anyone have an idea of what might be causing this issue?

edited Mar 24 '18 at 22:00

user4581301

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asked Mar 24 '18 at 21:53

MasterYork42

1

So the size is not constant? – Raindrop7 Mar 24 '18 at 21:55
You are attempting to initialize a variable length array. The compiler has no clue how long this array will be and cannot generate the appropriate code. This is but one of the many reasons the variable length arrays are not part of Standard C++. – user4581301 Mar 24 '18 at 21:57
C++, and what is a workaround to variable length arrays in c++? – MasterYork42 Mar 24 '18 at 21:58
3

`std::vector y(size);` will make a dynamic array of size `size` with all the values initialized to 0. – user4581301 Mar 24 '18 at 21:59
Documentation on `std::vector`: http://en.cppreference.com/w/cpp/container/vector – user4581301 Mar 24 '18 at 22:00

C ++ Error: variable-sized object may not be initialized?

0 Answers0