How can I set an array's size at run time?
How can I avoid
fixed-sized arrays?
The equivalence between arrays and pointers (see question 6.3) allows a pointer to malloc'ed memory to simulate an array quite effectively. After executing
#include <stdlib.h> int *dynarray = (int *)malloc(10 * sizeof(int));(and if the call to malloc succeeds), you can reference dynarray[i] (for i from 0 to 9) just as if dynarray were a conventional, statically-allocated array (int a[10]). See also question 6.16.
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This page by Steve Summit // Copyright 1995 // mail feedback