No output….. what is this ?

Question

https://code.sololearn.com/cSBRZLKOcvoI/?ref=app

Answer 1

we need to use cout to get console output

example:
cout << a;

Answer 2

https://code.sololearn.com/cP40C8UP3iIW/?ref=app

Answer 3

thank u sooo muxh

Answer 4

can u plzz fix it