#include <stdio.h>
int main() {
int n;
scanf("%d", &n);
int L[n];
// ...
return 0;
}
I'm asking if I can give the number of elements in an array as needed using a variable . The teacher told us that this method is not recommended and I did not understand why. Thanks for answering for my question .
This declaration
int L[n];
is a declaration of a variable length array. Variable length arrays are conditionally supported by compilers.
So it is not excluded that you can meet a compiler that does not support such declarations.
Pay attention to that in this declaration the value of the variable n shall be greater than 0.
As such an array has automatic storage duration then its size should not be vary big. Otherwise you should allocate memory for the array dynamically.