No display from glDrawElements

Question

When I use glDrawArrays I get a triangle in the middle of my screen, as expected. But when I try to use glDrawElements nothing comes up at all.

I have tried all sorts of

Answer 1

I would start your index at zero as others have pointed out. But there is one other problem I see...

glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_INT, &index);

should be...

glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_INT, index);

...as index is an array, it is already a pointer, no need for &.