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Questions tagged [pre-increment]

For issues relating to defining or performing pre increment operations.

Pre-increment operators increase the value of their operand by 1 (or another specified amount), and the value of the operand in the expression is the operand's value after the increment operation.

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How compiler differentiate pre-increment operator function & post-increment operator function in operator overloading in c++?

As we know to differentiate between pre-increment & post-increment operator function, we use a dummy argument in post-increment operator function. But how the compiler INTERNALLY differentiate between these two functions as we know in function…
user14401314
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Unexpected output in expession using pre-increment

#include using namespace std; int main(){ int numb = 2; numb = ++numb + ++numb; cout << numb; } Why is the output 8?
Aryan Sharma
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how does C++ operator ++ overloading work

I am currently practicing operator overloading regarding the increment operator ++, so I want to create a class myInt with just an integer m_Int and initialize it to zero.To distinguish pre & post increment, I created two overloading functions like…
Larry1024
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I can't understand that why is the output of this code 15, 4, 6

I have written this piece of code, but the output of this code is not what i expected. Can anyone explain me how come 15, 4, 6 is the output. #include int main () { int a = 1, b = 1, d = 1; printf("%d, %d, %d", ++a + ++a + a++,…
Yash Malaviya
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The incrementer values for an array using a size_t operator

In the following piece of code: #include #include void main () { int n[5] = {1,2,3,4,5}; printf("%s%13s\n","element","value"); for (size_t i = 0; i<5; ++i) { printf("%7d%13u\n", i, n[i]); …
sarah
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Why Does Post-increment in C# Still execute for this inequality

in the following "while" code: int digit = 0; while(++digit < 10) Console.WriteLine(digit); This prints out 1,2,3,4,5,6,7,8,9 This makes sense to me, since it should stop at 10, since 10<10 is false. However, when we switch…
Julius Dahne
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Output of a program specific to pointer

#include int func(int *p , int n) { for(int i = 0 ; i < n ; i ++) { printf("%d\n", *(p + i)); *(p + i) +=1; p = ++p; printf("%d\n", p); } } int main() { int arr[5] = {1,2,3,4,5}; …
Megha Aggarwal
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Post increment C++ Output

#include using namespace std; int main() { int a=5, b; cout<
Faraz Suhail
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Overloading unary operator specially post-increment and pre-increment using friend keyword

I know this topic might not be useful. This question can across in my mind when I was implementing friend function. In operator overloading of post-increment member function we need to write int as argument (for the sake of differentiating it from…
Priyansh
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post and pre increment/decrement comarison in if in C

#include int main(void) { int a = 10; if(a == a--) { printf("TRUE 1"); } a = 10; if(a == --a) { printf("TRUE 2"); } return 0; } I thought this code should print TRUE 1 but rather the…
Tirthankar Bhattacharya
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Why is a reference needed in operator overloading?

In what situations would a reference be needed when overloading, as the code still works without it? I am aware it has something to with chaining, but I do not understand exactly why the reference is needed. Example: Object& operator++();
user11958866
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How do logical && and || operators along with increment and decrement work?

Evaluate the following expressions. Find x,y,z values in each case. Assuming x=1 and y=5 initially, what do you observe: z=++x && ++y; z=--x && --y; z=++x || ++y; z=--x || --y; How are logical operators affecting the values?
Mayank
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How does incrementing an element(integer) in array work in C?

int main(){ int a[5]= {5, 1, 15, 20, 25}; int i, j, k=1, m; i = ++a[1]; // i becomes a[1] + 1 which is 2 but a[1] changes to 2 even though I'm assigning a value to i? j = a[1]++; // j becomes a[1]+1 which is 2+1 but stay as 2? m…
Alex Oh
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post/pre increment usage in c++ clarrification

from past 2 days i have been trying to understand and apply the concept of post/pre increment operators as part of the c++ self learning modules. WHat i know: post inrement:it first asigns the value then increments. pre increment:it…
Chandradhar Rao
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Difference in Call by Reference Vs Call by pointer argument todo pre and postincrement

I know how to do call by reference and call by pointer operations. But I am confused about doing both of them in pre and post-increment operation. Here the code snippet. Call by reference with pointer arguments void fun2(int *x) // It works like int…
Sumon Dey
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