post-increment Questions
1
Solved
C++ requires that an OutputIterator type X support expressions of the form r++, where r is an instance of X. This postfix increment must be semantically equivalent to:
(*) { X tmp = r; ++r; return...
Motionless asked 9/8, 2012 at 2:52
2
Solved
Is
--foo++;
a valid statement in C? (Will it compile/run) And is there any practical application for this?
Sorry for changing the question in an edit but I found something out.
According to my...
Theophilus asked 26/7, 2012 at 23:0
4
Solved
When I do this:
count = ++count;
Why do i get the warning - The assignment to variable count has no effect ?
This means that count is incremented and then assigned to itself or something else ?
Is...
Macleod asked 24/7, 2012 at 21:24
3
Solved
I've had my brain wrinkled from trying to understand the examples on this page:
http://answers.yahoo.com/question/index?qid=20091103170907AAxXYG9
More specifically this code:
int j = 4;
cout <...
Cleanshaven asked 21/6, 2012 at 19:24
2
Solved
When does the post increment operator affect the increment? I have come across two opinions:
1) From http://gd.tuwien.ac.at/languages/c/programming-bbrown/c_015.htm:
POST means do the operation...
Franck asked 1/2, 2011 at 17:5
6
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Is there any performance difference between using int a=a+1 and a++ in Java?
If so which is better and why? Could you briefly explain me to understand this?
Ultravirus asked 15/2, 2012 at 11:21
6
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I am a little confused about how the C# compiler handles pre- and post increments and decrements.
When I code the following:
int x = 4;
x = x++ + ++x;
x will have the value 10 afterwards. I thi...
Tophet asked 20/12, 2011 at 9:23
3
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I'd like to refactor some old C code of mine, and I was curious if I can replace all ptr++ with ptr += 1 where ptris some pointer, without changing any behavior. Here's an example of what I mean, f...
Binal asked 7/12, 2011 at 19:10
5
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I am trying to increment a variable using the ++ operator but I keep getting NaN as a result and I'm not sure why. Here is my code:
var wordCounts = { };
var x = 0
var compare = "groove is in the ...
Unwritten asked 29/11, 2011 at 5:3
15
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I'm studying for the OCPJP exam, and so I have to understand every little strange detail of Java. This includes the order in which the pre- and post-increment operators apply to variables. Th...
Echinoderm asked 7/11, 2011 at 16:0
8
Solved
The following code confused me a bit:
char * strcpy(char * p, const char * q) {
while (*p++=*q++);
//return
}
This is a stripped down implementation of strcpy function. From this code, we see ...
Anders asked 30/8, 2011 at 20:13
6
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Note: Please note that the code below is essentially non-sense, and just for illustration purposes.
Based on the fact that the right-hand side of an assignment must always be evaluated before it's...
Ogdoad asked 2/7, 2011 at 18:4
1
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I know that the postfix versions of the increment/decrement operators will generally be optimised by the compiler for built-in types (i.e. no copy will be made), but is this the case for iterators?...
Osprey asked 21/6, 2011 at 2:5
3
Solved
I admit that I asked a question about why Closure Compiler does not shorten certain code which looks shortenable at first sight a few days ago already, but that reason is not applicable in this cas...
Unleash asked 9/4, 2011 at 19:5
4
Solved
Possible Duplicate:
Undefined Behavior and Sequence Points
In C++ on a machine code level, when does the postincrement++ operator get executed?
The precedence table indicates that po...
Morphia asked 25/3, 2011 at 14:33
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
1
Solved
I am trying to figure out a couple of things here:
How do I write an increment operator for a node class that has a pointer to the next node?
How do I implement iterators for a class like below?
...
Beastings asked 1/12, 2010 at 22:11
9
Solved
Possible Duplicate:
Is there a performance difference between i++ and ++i in C++?
Is there a reason some programmers write ++i in a normal for loop instead of writing i++?
Peristyle asked 23/11, 2010 at 22:37
2
Solved
Can I use x on both sides of a boolean expression when I post-increment it on the left side?
The line in question is:
if(x-- > 0 && array[x]) { /* … use x … */ }
Is that defined thr...
Nerissa asked 28/10, 2010 at 15:33
5
Solved
In example code, I often see code such as *it++ for output iterators. The expression *it++ makes a copy of it, increments it, and then returns the copy which is finally dereferenced. As I understan...
Glimpse asked 22/10, 2010 at 22:49
1
Solved
I'm new to C language so please sum1 help me out.
A C code written
int i=3;
printf("%d",++i + ++i);
Complier gives O/P =9. How?
Fortunetelling asked 28/9, 2010 at 12:50
2
Solved
I have an int pointer (i.e., int *count) that I want to increment the integer being pointed at by using the ++ operator. I thought I would call:
*count++;
However, I am getting a build warning "...
Barbed asked 7/9, 2010 at 4:16
4
Solved
Possible Duplicate:
Could anyone explain these undefined behaviors (i = i++ + ++i , i = i++, etc…)
My code is as follows:
#include <stdio.h>
int main()
{
int x = 10, y ...
Talanta asked 19/7, 2010 at 2:19
3
I can't make heads or tails of the following code from "java puzzlers" by joshua bloch.
public class Test22{
public static void main(String args[]){
int j=0;
for(int i=0;i<100;i++){
j=j++;...
Villon asked 1/5, 2010 at 14:3
5
Solved
Why does the following code
int i = 1;
System.out.print(i += i++);
System.out.print(i);
output 2 two times instead of 3 for the 2nd print?
Could somebody please shed some light on it?
Thanks...
Touchmenot asked 17/1, 2010 at 12:56
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