I am having trouble with : meaning.

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what does the semicolon mean in this example >> for (const auto& value : 1st)

C++

#include <initializer_list>
using namespace std;
int makeSum(initializer_list<int> 1st)
{  int total= 0;
for (const auto& value : 1st) { //Right here
total += value;  }
return total;  }

What I have tried:

I tried to ask here, again and again.

Posted 16-Dec-18 9:30am

Member 13010616

Updated 16-Dec-18 22:52pm

CPallini

v3

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nv3 17-Dec-18 3:51am

And replace that "1st" by "lst" -- in C++ identifiers don't start with a digit! It almost looks the same, but makes a great difference. That's what happens when one just copies things and doesn't try to understand what's going on.

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Dave Kreskowiak · Answer 1 · 2018-12-16T10:22:00

Stop being a help vampire. You either learn to do your own research or you're in the wrong class. Writing code requires you to do a LOT of research if you're going to survive in this business.

Now, again, that is a COLON, not a semicolon.

Next, if you would have Googled for "C++ for const auto", you would have found out that you're looking at a range-based for loop.

Reading the documentation on a range-based for loop[^], you would have seen that the expression after the colon is expected to be a "range expression", or something that returns a range of objects. This is also known as a "list", which you are expected to pass in as described in your makeSum function header.

Richard MacCutchan · Answer 2 · 2018-12-16T22:53:00

Solution 2

As Dave says, "stop being a help vampire". Go to C++ Language Reference | Microsoft Docs[^] and make an effort to actually learn the language.

Posted 16-Dec-18 22:53pm

Richard MacCutchan