Answer 1

https://www.sololearn.com/discuss/489143/?ref=app
int i=1;// assigned 1 to I initially
i=++i+i++;
cout<<I;
first ++i=i+1=1+1=2 so now the value of i become 2
then i++=i+1=2+1=3
so finally i=++i + i++=2+3=5
so output is 5
pre increment first increment the value then store