postfix-operator Questions
17
Solved
One of the tips for jslint tool is:
++ and --
The ++ (increment) and -- (decrement)
operators have been known to contribute to bad code by
encouraging excessive trickiness. They
are second only to...
Blanketing asked 9/6, 2009 at 17:2
3
Solved
I can't get my head around why the code below is not working as expected:
#include <stdio.h>
int main() {
int i = 0, size = 9, oneOrZero[] = {1,1,1,1,1,1,1,1,0};
while (i < size &&a...
Jayejaylene asked 12/10, 2020 at 8:54
13
The following code prints a value of 9. Why? Here return(i++) will return a value of 11 and due to --i the value should be 10 itself, can anyone explain how this works?
#include<stdio.h>
mai...
Markitamarkka asked 11/8, 2011 at 18:59
1
Solved
Although this question might be answered somewhere and I could not find it.
Below written first statement work whereas second does not? WHY?
int main() {
int x = 1, y = 2;
int *p = &++x; /...
Miltiades asked 8/4, 2020 at 19:21
5
Today I stumbled over a C riddle that got a new surprise for me.
I didn't think that -1[p] in the example below would compile, but it did. In fact, x ends up to be -3.
int x;
int array[] = ...
Mercantile asked 14/8, 2019 at 17:18
3
Solved
I am working with the C operator precedence table to better understand the operator precedence of C. I am having a problem understanding the results of the following code:
int a, b;
a = 1;
b = a++...
Callie asked 6/2, 2019 at 20:24
2
Solved
In the Perl doc, there is a section about .postfix/.postcircumfix, it says that
In most cases, a dot may be placed before a postfix or postcircumfix:
my @a;
@a[1, 2, 3];
@a.[1, 2, 3]; # Same
...
Competency asked 5/5, 2018 at 12:2
1
Solved
I have just got the following warning from clang-tidy:
overloaded "operator++" returns a non-constant object
instead of a constant object type
https://clang.llvm.org/extra/clang-tidy/checks/ce...
Intrigue asked 18/10, 2018 at 9:28
2
However It is clearly written in precedence table that postfix operator has higher priority than prefix. But still I have a daubt.
I start with following example:
*ptr++; // evaluate as *(pt...
Bobbitt asked 4/7, 2014 at 17:53
6
Have a look at these function signatures:
class Number {
public:
Number& operator++ (); // prefix ++
Number operator++ (int); // postfix ++
};
Prefix doesn't take any parameter but pos...
Fula asked 26/8, 2010 at 11:58
9
Solved
I read from the official tutorial of Java that prefix and postfix ++ -- have different precedences:
postfix: expr++ expr--
unary: ++expr --expr +expr -expr ~ !
Operators
According to the t...
Joannejoannes asked 16/6, 2011 at 14:58
1
Solved
I am writing my own array class as an exercise. Since, I read non-member functions are actually better in some ways than member functions.
(Scott Meyers)
I am trying to write as many operator ove...
Forayer asked 13/9, 2013 at 15:3
1
Solved
I was wondering why the following outputs 7 7 6 7 instead of 5 6 6 7
my $a = 5;
printf("%d %d %d %d",$a,++$a , $a++ , $a);
I'm pretty sure it has something to do with the order of parameters com...
Perpetual asked 15/5, 2013 at 16:31
3
Solved
Currently I'm teaching a class of C++ programmers the basics of the C# language. As we discussed the topic operators I used C# standard categories of primary, unary etc. operators.
One of the atte...
Sebastian asked 13/8, 2011 at 8:26
2
Solved
While looking into Can you have a incrementor and a decrementor on the same variable in the same statement in c
I discovered that you can have several prefix increment/decrement operators on a sin...
Ketone asked 26/7, 2012 at 23:28
1
Solved
It's necessary to use a postfix delimiter to denote the type of constant being used in the source code, like L for long. However, for shorts and bytes there are no delimiters, so I need to explicit...
Voluptuous asked 18/11, 2011 at 3:47
4
Solved
Because I've overloaded the operator++ for an iterator class
template<typename T>
typename list<T>::iterator& list<T>::iterator::operator++()
{
//stuff
}
But when I try to...
Diaconate asked 21/5, 2009 at 19:55
3
Solved
Defined this way, we can do neither ++x++ nor ++x--. But on the other hand, both (++x)++ and (++x)-- are useful expressions: (++x)++ increments x by two and returns the value "in the middle", while...
Omnipresent asked 22/5, 2011 at 7:29
4
Solved
I compiled the following example:
#include <iostream>
#include <iterator>
using namespace std;
class myiterator : public iterator<input_iterator_tag, int>
{
int* p;
public:
my...
Clino asked 3/12, 2010 at 16:32
3
Solved
Possible Duplicate:
What does a type followed by _t (underscore-t) represent?
While typing in my IDE (Xcode), autocomplete pops up already-defined words when I'm partway thru entering s...
Haiti asked 8/9, 2009 at 0:42
9
Solved
I am trying to show by example that the prefix increment is more efficient than the postfix increment.
In theory this makes sense: i++ needs to be able to return the unincremented original value a...
Hudibrastic asked 12/7, 2009 at 19:40
1
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