How to find the size of an integer array in C.
Any method available without traversing the whole array once, to find out the size of the array.
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How to find the size of an integer array in C.
Any method available without traversing the whole array once, to find out the size of the array.
If the array is a global, static, or automatic variable (
int array[10];), thensizeof(array)/sizeof(array[0])works.If it is a dynamically allocated array (
int* array = malloc(sizeof(int)*10);) or passed as a function argument (void f(int array[])), then you cannot find its size at run-time. You will have to store the size somewhere.Note that
sizeof(array)/sizeof(array[0])compiles just fine even for the second case, but it will silently produce the wrong result.