Oct 2, 2013 · I have an array which might contain empty/null positions (e.g: array[2]=3, array[4]=empty/unassigned). I want to check in a loop whether the array position is null. …

Mar 26, 2018 · empty () function is used to check if the array container is empty or not. Syntax : No parameters are passed. Returns : . myarray.empty(); Errors and Exceptions 1. It has a no …

Feb 27, 2011 · As exposed above, an array of ints can't have "empty" elements. However, you can always determine a convention if you want to. For instance, if you're only interested in …

Feb 19, 2022 · The most general answer is yes, you should make sure that you only access users that are not null. However, there are several ways to make sure of this. One possibility is to …

Nov 14, 2010 · You need to set all of your array cells to NULL (or to 0, or to whatever value represents emptyness in your program logic) and then you can check it in the way you did: int …

Oct 4, 2010 · An array in C++ cannot be null; only a pointer can be null. To test whether a pointer is null, you simply test whether it compares equal to NULL or 0.

Dec 13, 2012 · In this case selecting the null pointer value as the reserved value designating an "empty" element is an obvious good choice. Declare your results array as. char * results[10] = …

Jun 12, 2015 · I have to determine the number of elements that are not NULL. I have come up with: int count=0; for(i=0; i<7, i++) { if(s !=NULL) { count ++; } }

Feb 19, 2017 · You can check if you've been passed a NULL pointer by simply comparing the array with NULL: if(array == NULL) { return 0; } else { return array[0]; } Share

Feb 15, 2023 · The only way to check is to search the entire array. Most efficient is to just run a for loop or while loop and check every element. If a match is found, set a flag and break out of …