I have problem with incrementation inside if else statement in C++ quizes,i am really confused .

Question

for eg
int x=1,y=2;
if(x++>=2 || ++y>=3)
{
cout<<y;
}
else
{
cout<<x;
}
please give and explain the output of above snippet.

Answer 1

This outputs 3.

x++>=2
This first gets the current value of x which is 1 and does the comparison.
1>=2 this is false and since an OR is used the 2nd condition will be checked also.
x is incremented to 2

++y>=3
This will first increment the value of y to 3 and then perform the comparison.
3>=3 this is true so the if statement is ran.

cout<<y; // y has a value of 3

Answer 2

Prefix ++ (before-name) takes precedence above all else. Postfix only gets excecuted last here, so its:
if(1 >= 2 || 3 >= 3) // false OR true -> true
{
cout << "3";
}...

Answer 3

Then cout<<x; is ran where x will have a value of 2. As the first condition is false so the second will not be ran/checked (y is not incremented) and the else block is ran.

Answer 4

thanks,what.will be the value of x in the end?

Answer 5

if || operator is replaced with && then?