how to initialise an array data member with all zeros
hi,
is there any other way to do it rather than looping?
similar to this:
int array[100] = { 0 };
thx
is there any other way to do it rather than looping?
similar to this:
int array[100] = { 0 };
thx
memset(array, 0, 100);You can find the memset() function in <cstring> (or string.h if you are using C rather than C++).
For more details, check out http://www.cplusplus.com/reference/clibrary/cstring/memset.html
I hope this helps! ^_^
rpgfan
wow,
thank you very much... that's a nice trick. I suppose that is only possible in the constructor, and not in an initialiser list, isn't is?
nevertheless, better than a loop...
cheers
ps: what if it is an array of objects, like this data member:
thank you very much... that's a nice trick. I suppose that is only possible in the constructor, and not in an initialiser list, isn't is?
nevertheless, better than a loop...
cheers
ps: what if it is an array of objects, like this data member:
QString _results[NUM_OF_ALGORITHMS];
Last edited on
The default constructor will be executed for each element of the array automatically.
For that matter, int's default constructor runs 100 times in your original example; the reason you have to explicitly initialize the elements to 0 is because int's default constructor does nothing.
For that matter, int's default constructor runs 100 times in your original example; the reason you have to explicitly initialize the elements to 0 is because int's default constructor does nothing.
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