I do not understand the difference between pre and post increment/decrement. Tell me

Answer 1

pre increment
i=0
++i bcm 1

post increment i=0
i++
used the i then increment in next iteration

Answer 2

When

x = ++y

1st. y=y+1
2nd. x = y

When
x = y++

1st. x=y
2nd. y =y+1

Answer 3

x=2
y=x++ (POSFIX) means that
y=2 and x=3
but if y=++x
y=3 and x=3 (PREFIX)

Answer 4

x++ Use the variable and afer that, it increase its value
++x Increase the value of the variable, after that use if

Example 1 ---------- (Displays "Msg1, value of x=2")

int x = 1;
if (x++==1){
cout<<"Msg1, value of x="<<x;
}
else{
cout<<"Msg2values of x="<<x;
}

Example 2 ---------- (Displays "Msg2, value of x=2")

int x = 1;
if (++x==1){
cout<<"Msg1, value of x="<<x;
}
else{
cout<<"Msg2values of x="<<x;
}