Explain this question please?

Question

Wht happened in this program explain please .

https://www.sololearn.com/post/417181/?ref=app

Answer 1

Amya Ziyayeva
let’s call the variable ‘a’ outside function = y.
You pass (y,y) into the function.
Parameter(&a, &b) means:
a becomes reference of y
b becomes reference of y

a = 3, y becomes 3
b = 4, y becomes 4
return y + y = 8

printing value:
a = y = 4
b = 7
c = 8

Answer 2

Bobby Fischer i understood your explanation . thnks