Subtracting one from the value of a variable, generally with the use of an decrement operator.
Subtracting one from the value of a variable, generally with the use of an decrement operator(--).
Questions tagged [decrement]
425 questions
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votes
5 answers
Prevent the risk when using decrement/increment postfix operator in C++?
Recently I found the risk when using st like this:
int i = 10;
int sum = 0;
while ( i-- ){
sum = sum + i;
It actually get sum = 9 + 8 + 7 + .. + 1. So it lacks 10 in total. But I prefer this way of coding, it's fast and professional. Is there…
Duc Tran
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votes
1 answer
How to trace a C++ program by hand?
#include
int fun(int &x,int y=10)
{
if(x%y==0)
return (++x);
else
return (y--);
}
int main()
{
int p=10,q=13;
q=fun(p,q);
cout<
Bhargab Kakati
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votes
2 answers
Incrementing/decrementing entirely a float type number
What I'm trying to do is to increment the entire float value, for…
-4
votes
2 answers
Java input value for variable from scanner isn't applying to variable in method
I'm fairly new to Java so bear with me. I'm making a recursive method in Java that allows me to input a number X and have the system print each value in decrements of 2 until it reaches 1. (I'll have to add a rule that the scanner can only take odd…
Dotol
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votes
4 answers
Why is the -- operator not subtracting from the value when executed?
Why is the decrement operator -- not bringing the value down by 1 when executed?
int a = 20;
int c ;
c = a--;
Inspecting the value of c now, it should be 19, yet it comes out as 20. What am I missing?
StevieMack
- 3
- 1
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votes
1 answer
Minus input number in JTextField from stored Values
I'm trying to make a stock system, when a user enters a number of an item they want it's subtracted from the total available. How would I do this? I'm a beginner so I'm not too sure
For My code below trying to get the input of sofa and minus it…
user3403781
- 19
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votes
9 answers
increment operator more purpose?
I was wondering if the increment and decrement operators ( ++ -- ) have more purpose to it than its plain use to make the code more simple
maybe:
i++;
is more efficient than:
i = i + 1;
?
alfalfa
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votes
3 answers
Does brackets matter in a combination of post decrement or increment like this one: x+=(x++)+(++x);
For the following program is it necessary to have the brackets in the statement of post-increment or decrement
public class sample
{
public void f1()
{
int x=4;
x+=(x++)+(++x);
System.out.println(x);
}
}
^^Is this equal to
public…
bhargav
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votes
3 answers
How did this output come from this program?
Hello pro coders of stackoverflow community, I'm still a beginner and I need help understanding the problem below:
int main()
{
int x=4,y=0;
while(x>=0)
{
if(x==y)
break;
else
…
GlitchInTheMatrix
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votes
2 answers
Increment and Decrement operators
I am confused about the output of this program:
#include
int main()
{
int i=2;
while(i + 1?--i:14)
printf("\n%d", i);
return 0;
}
The output of the above program is printing 1 and not printing 1 and then 0
When i-- is…
user3485153
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votes
1 answer
Post decrement, what is a-- * a--?
int a = 10;
System.out.println(a-- * a--);
what will be the output of these print statement and why??
in post decrement we actually observe that
the value is used before getting change
but here I am getting in one of the operator (a--) is 10…
-6
votes
1 answer
Increment and decrement operators in one statement in C
I know it is theoretically undefined behavior and of course bad style. This is the example of a school (I am not the pupil).
But why do I get 7 (example a) resp. 1 (example b) out of this operation:
Online…
Christian
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votes
1 answer
What will be the working of this statement in program of java?
The Question is
if c=12;
c=c++ + ++c;
what will be the working solution for this?
like how would it be ex(12+13)something like this
please specify what would be (c++)and what would be (++c)
CrEaToR VR
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votes
1 answer
What is the output of this code? Am i missing something here?
void main()
{
int num, a=15;
num = ----a--;
cout<
Niranjan Dixit
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votes
1 answer
Does using the ++ or -- operator on different variables in the same expression invoke UB?
I wanted to know whether using the increment(++) or the decrement(--) operator on different variables in the same expression undefined behavior; Such as
int i=1,j=2;
int k=i++ + j++;
In the above code,the value of k is 3 in clang,GCC and in vc.
Spikatrix
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