You’re close. Note that you can define it inside the for loop: And if you are using C++11 then you can use a range-based for loop instead: Here auto automatically deduces the correct type. You could have written Student const& i instead.
Is there any reason I don’t see this in C++? Is it bad practice? No. It is not a bad practice, but the following approach renders your code certain flexibility. Usually, pre-C++11 the code for iterating over container elements uses iterators, something like: This is because it makes the code more flexible. All standard library containers … Read more
edit: I prefer seq over the other methods because I can actually remember it 😉
How about this?
It’s a strange construct even to seasoned Python coders. When used in conjunction with for-loops it basically means “find some item in the iterable, else if none was found do …”. As in: But anytime you see this construct, a better alternative is to either encapsulate the search in a function: Or use a list … Read more
I’ve created a GUI using wxFormBuilder that should allow a user to enter the names of “visitors to a business” into a list and then click one of two buttons to return the most frequent and least frequent visitors to the business. I created an earlier version that, unfortunately, gave me the range of visitors, … Read more
edit: I prefer seq over the other methods because I can actually remember it 😉
++i will increment the value of i, and then return the incremented value. i = 1; j = ++i; (i is 2, j is 2) i++ will increment the value of i, but return the original value that i held before being incremented. i = 1; j = i++; (i is 2, j is 1) For a for loop, either works. ++i seems more common, … Read more
Error messages usually mean precisely what they say. So they must be read very carefully. When you do that, you’ll see that this one is not actually complaining, as you seem to have assumed, about what sort of object your list contains, but rather about what sort of object it is. It’s not saying it wants your list to … Read more
This is an array of arrays. It is a little bit easier to read like this: That makes it a little bit easier to see that you have an array of 3 arrays. The outer ‘for’ will loop through each of 1st level arrays. So the very first outer for loop when i=0 you are … Read more