help me!

Question

For example, y= 5. What will be the value of x and
y after y=++x and y=x++?;

Answer 1

Estiaque A. Evan
so there is no value for x which means
x = 0
y = 5

y = ++x; // ++x(means increment before assigning) makes x = 1 and then we assign it to y
(so now y = 1 and x = 1)

y = x++; // x++ makes the increment afterward so 1 is assign to y and later x itself becomes 2
(now y = 1 and x = 2)
________________________
this code is fine without x being initialize to anything here in SL C compiler .(by default x becomes 0 here in SoloLearn c compiler)

#include <stdio.h>
int main() {
int x, y = 5;
y = ++x;
printf("x=%d, y=%d\n",x,y);

y = x++;
printf("x=%d, y=%d",x,y);
return 0;
}
________________________
Read this to understand well.
https://www.sololearn.com/discuss/96907/?ref=app

Answer 2

rkk just a small correction, if a variable is declared but not initialized then the value it stores is indeterminate. It is not 0 and depends completely on the compiler you are running the code on. It generally gets the value from the memory where the variable is stored.

Answer 3

Avinesh Right! Thank you ☺️

(I forgot about the EVIL garbage value) 😅

Answer 4

~ swim ~ I tried to oversimplified it mathematically. (when there's no apples in the basket, it's means 0 apples are there) 😅😁

You're right buddy. ☺️

(I forgot about the EVIL garbage value) 😅

Answer 5

rkk Ohh yaa! You are ryt!
I forgot that they can be initialised 😂

Answer 6

rkk thank you so much! you just saved my 10 marks in exam👍❤

Answer 7

Estiaque A. Evan I would be much happier if you have learnt something new from it.
Anyway, you're welcome and happy learning.

Answer 8

rrk, I'm a newbie to programming world! That's why I'm getting confused!
but, I promise I will learn it very quickly👍

Answer 9

The problem is not properly defined x should be initialised with a specific value 😶

Answer 10

since there is no value assign to x .
default value 0 is assign to x .
and value 5 assign to y(given)

++x => pre increment means first increment variable value by 1 then use the value.

x++ => post increment means first use the value then increment value by 1.

so y =++x here y value become 1.
and in y=x++ here y value is 1.
and value of x is 2.

for better understanding you can also see the code :)

https://code.sololearn.com/c34FdeG2zs36/?ref=app

Answer 11

Nice question ✌🏽 BTW, I already had made an example on incremental operator types prefix and postfix. I represent my answer a web developer. Here it is⬇️⤵️
https://code.sololearn.com/WBlp4B5Go100/?ref=app

Answer 12

Let y=5 and x =0
1, cout<<++x;
it increment and print the value by one that is #1

2, x++
The value is printed and then x is incremented.

Now, lets take one example in c++
(NB: the way it works is the same in many lags!)

//check and execute each one by one
#include<iostream>
using namespace std;
int x=0;
int y=5;

int main(){

cout<<x
<<x++
<<++x
<<endl;

return 0;
}

Answer 13

There is no value of x!

Answer 14

x = 5
x++ = 6
++ equal to '+1'

Answer 15

Integer default value is 0, so if x is declared and not initialize we will have this in the memory

x=0;
y=5;
Pre-incrementing x the assigning it value to y, we will have

x=1;
y=1;
Post- incrementing x then assigning the value to y will give us

x=2;
y=1;

Answer 16

y = ++x then x = 4 (first add 1 to x the assign the value to y and since y = 5 then x mush be 4 )
y = x++ then x = 5 (first assign the value to why then add which means its already 5 )

Answer 17

++x pre increment will store the value after increasing
x++ post increment will store the value before increasing. That's it.

Answer 18

Y will be 5 after ++x and it will be 6 after x++

Answer 19

In y=++x, x's value, whatever value it has will be incremented by 1 first and that value will be stored in y as well as in x. And if u are writing in c then x will possess garbage value as there is no value of x mentioned above

And in y=x++, x's original value will be stored first in y(whatever value of y may be) and x's value will be incremented by 1 which will be stored in x.

Answer 20

1. What is x???