Question

Consider the following C++ program, predict the output and justify it. 

#include using namespace std; 

int sqr(int&); 

int main()

Answer 1

The output are 25 and 6. Here the function uses call by reference method. The function call sqr(a) passes the original value to the function sqr. The function changes the value of b(here a and b are same) to 6. That means a also becomes 6.