> When variables are allocated on the stack, the space for them with all compilers I have ever used (or written) is allocated on the stack once by adjusting the

> When variables are allocated on the stack, the space for them with all compilers I have ever used (or written) is allocated on the stack once by adjusting the stack pointer - i.e. for all of the variables of the function. it's not a given int algo(int*, int n); int computation(int i, int n) { int alloc[n]; return algo(alloc, n); } on some compilers (Keil for instance afair), alloc will be heap-allocated (and freed when leaving the function) even if it's "automatic storage" (what most people call the stack).