Reference variable doubt

#1

i have used ostream os and not ostream &os as 1st argument inside operator<< function why it is giving error and not working.

#2

hello @varu
we r passing it by reference to avoid copying time.
not any other reason.
for ur reference-> https://stackoverflow.com/questions/30272143/why-does-overloading-ostreams-operator-need-a-reference

#3

but it should not give error then why it s

#4

no it should not give any error.

please share ur code ,i will check

#5

but it should not give error then why it is giving error

#6

, , , , ,

#7
#8

please see line no.205

#9

a) u r not returning anything from ur function

b) another reason why we pass as refernce is this->
image

and that is why we are passing it as refernce.
avoding copy is also one of the valid reason.

refer this-> link

#10

ok,thanks you sir now i got it!