please explain me why this output is 2 3 20

Question

#include<iostream>
using namespace std;

int main()
{
int i[5]={2,5,15,20,30};
int a,b,c,d,e;

e=3;
c=1;
d=0;

a=++i[d];
b=i[d]--;
c=i[a--];

cout<<a<<" "<<b<<" "<<c;
}

Answer 1

Please edit your question and use adequate tags.

https://www.sololearn.com/discuss/1316935/?ref=app

Answer 2

a=++i[d] increments i[d] and assigns it to a. i[d] becomes 3 and its assigned to a.
b=i[d]-- assigns i[d] to b so b is now 3 and then decreases i[d] so i[d] becomes 2 again.

c=i[a--] assigns i[a] to c. remember a was 3 so i[3] is 20. so c is 20. but there is a-- inside bracket so a decreases and becomes 2.
hence a b c is 2 3 20