Unable to understand pre and post increment

#1

https://ide.codingblocks.com/s/41907
it prints 7 but https://ide.codingblocks.com/s/41908 this prints 6 why

#2

Pre : value first changed (increased or dec ) then used
Post : value first used then changed (inc or dec)

int main() {
int i=6;
i++;
cout<<i;

}
value first changed ( i.e 7 ) then printed so 7

here :
#include
using namespace std;
int main() {
int i=6;
int x=i++;
cout<<x;
}
value first used (i.e x gets 6 then changed (i.e i=7 ) hence x is 6

I hope this clears your doubt!
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Cheers!

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#3

but why in int main(){
int i=6;
i++;
cout<<i;
but here first i should be print then it should be changed means 6 should be printed then i should become 7

#4

you are getting confused with using and changing.
using means in the current place where ā€˜iā€™ variable is mentioned it is older value is used and after that at memory location increment is performed.
in
int main(){
int i=6;
i++; stat
cout<<i;

i++ // after this value in memory referenced by becomes 7 so in next the statement value is printed as 7.

while in other code
x=i++;
older value of ā€™ i ā€™ is used then the value is incremented. (is you do a change cout<<x to cout<<x<<" "<<i then it will print 6 7.

Hit like if you it it :stuck_out_tongue:
Cheers!

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