post-increment Questions
3
Solved
When I compile and run the code below with either counter++ or ++counter substituted for x, the output is identical; in both cases, numbers 1 - 10:
for (int counter = 1; counter < 11; x)
{
std...
Install asked 8/2, 2015 at 10:10
3
Solved
I have never seen the usecase for pre-increment and post-increment in actual code. The only place i see them most often are puzzles.
My opinion is, it introduces more confusion rather than being us...
Nevertheless asked 25/3, 2010 at 5:18
2
I'm not sure whether statement below is well defined by standard C or not
*p1++ += 2;
or other similar statement:
*E1++ <operator>= E2
From standard C about post-increment:
The resul...
Assignee asked 17/10, 2014 at 2:49
5
Solved
Here is a very simple C program:
int main()
{
int i = 0;
while(i++ < 10)
printf("%d\n", i);
return 0;
}
The result is:
1
2
3
4
5
6
7
8
9
10
Why 0 is not the first number to print?
And...
Knockknee asked 27/8, 2014 at 23:49
3
I have a question about these two C statements:
x = y++;
t = *ptr++;
With statement 1, the initial value of y is copied into x then y is incremented.
With statement 2, We look into the value ...
Marybellemarybeth asked 26/5, 2012 at 6:38
4
I was wondering if there is difference between the two forms of increment. Some of the links says i++ is faster that i=i+1;
Also as one of the person my observation is also the same for assembly ...
Squamous asked 5/10, 2014 at 4:19
5
Solved
Why is "while (i++ < n) {}" significantly slower than "while (++i < n) {}"
Apparently on my Windows 8 laptop with HotSpot JDK 1.7.0_45 (with all compiler/VM options set to default), the below loop
final int n = Integer.MAX_VALUE;
int i = 0;
while (++i < n) {
}
is at...
Capitalist asked 15/8, 2014 at 7:24
7
Solved
The following code prints out "3", not "4" as you might expect.
public class Foo2 {
public static void main(String[] args) {
int a=1, b=2;
a = b + a++;
System.out.println(a);
}
}
I unders...
Laurencelaurene asked 28/9, 2009 at 21:33
3
Solved
#include <stdio.h>
int main()
{
int a = 10;
if (a == a--)
printf("TRUE 1\t");
a = 10;
if (a == --a)
printf("TRUE 2\t");
}
Why is the second if statement true?
Output is:
...
Monostome asked 25/1, 2014 at 12:19
1
Solved
Accordint to this quite highly upvoted answer, the canonical way to iterate through a set erasing some elements is the following:
for (it = mySet.begin(); it != mySet.end(); ) {
if (conditionToDe...
Aldon asked 23/10, 2013 at 15:35
3
Solved
So, if I execute the following code...
int x = 0;
Debug.WriteLine(x++);
Debug.WriteLine(x += 4);
Debug.WriteLine(x);
... I get 0, 5, and 5, respectively. What I'd like to get, however is 0, 1, a...
Surmount asked 9/12, 2013 at 5:0
4
I have some C code:
main()
{
int a=1;
void xyz(int,int);
xyz(++a,a++); //which Unary Operator is executed first, ++a or a++?
printf("%d",a);
}
void xyz(int x,int y)
{
printf("\n%d %d"...
Selfrenunciation asked 7/6, 2010 at 13:4
4
Consider this simple code:
// E1
public void doTest(String pattern) {
int counter = 0;
while (counter < 3) {
counter = counter++;
}
System.out.println("Done");
}
This causes an infin...
Aceldama asked 20/6, 2013 at 21:4
2
Solved
I'm running the following programs in Visual C++ and Java:
Visual C++
void main()
{
int i = 1, j;
j = i++ + i++ + ++i;
printf("%d\n",j);
}
Output:
6
Java:
public class Increment {
...
Middlebreaker asked 7/7, 2013 at 18:6
3
Solved
This is my code:
$a = 5;
$b = &$a;
echo ++$a.$b++;
Shouldn't it print 66?
Why does it print 76?
Ical asked 19/6, 2013 at 9:56
11
Solved
public void increment(){
int zero = 0;
int oneA = zero++; // Compiles
int oneB = 0++; // Doesn't compile
int oneC = getInt()++; // Doesn't compile
}
private int getInt(){
return 0;
}
The...
Embryologist asked 8/3, 2013 at 10:29
2
Solved
Someone postulated in some forum thread that many people and even experienced Java Developers wouldn't understand the following peace of Java Code.
Integer i1 = 127;
Integer i2 = 127;
System...
Biggs asked 25/2, 2013 at 10:25
3
In the PHP manual, operator precedence section, there is this example:
// mixing ++ and + produces undefined behavior
$a = 1;
echo ++$a + $a++; // may print 4 or 5
I understand the behavio...
Ideograph asked 2/1, 2013 at 7:21
6
Solved
I came across this problem in this website, and tried it in Eclipse but couldn't understand how exactly they are evaluated.
int x = 3, y = 7, z = 4;
x += x++ * x++ * x++; // gives x = 63
Syst...
Magnesium asked 13/11, 2012 at 21:46
6
Solved
y=x++;
In how many steps does it break at compiler level without optimization not at CPU level or instructions ?
Does any temporary is created to assign x to y or, it happens directly ?
Kickback asked 30/10, 2012 at 10:39
4
Solved
I came across the following issue:
private void doStuff(int i) {
if(i>10) {
return;
}
doStuff(i++);
}
public void publicMethod() {
doStuff(i);
}
I would expect this to run doStuff 10 t...
Fulsome asked 12/10, 2012 at 13:24
2
Solved
I read Is there a performance difference between i++ and ++i in C?:
Is there a performance difference between i++ and ++i if the resulting value is not used?
What's the answer for JavaScrip...
Penitence asked 20/9, 2012 at 0:45
3
Solved
During a programming class, the professor was teaching us about x++ and ++x, with x being an integer.
He said that in the scenario we are able to just put either x++ or ++x, ++x is more efficient ...
Coxalgia asked 12/9, 2012 at 22:1
5
Solved
Test this code in Flash:
var i:int = 0;
for (var j:int = 0; j < 5000000; j++)
{
i=i+1;
}// use about 300ms.
i = 0;
for (var j:int = 0; j < 5000000; j++)
{
i++;
}// use about 400ms
i = 0;...
Cadmus asked 31/8, 2012 at 3:14
1
Solved
Per the (excellent) question C++ OutputIterator post-increment requirements, we observe that for a dereferenceable and incrementable value r of OutputIterator type X, and value o of appropriate typ...
Fluviomarine asked 9/8, 2012 at 15:47
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