Q.42 What is the return value of f(p,p), if the value of p is initialized to 5 before the call? Note that the first parameter is passed by reference, whereas the second parameter is passed by value.

int f (int &x, int c) {

c = c - 1; 
if (c==0) return 1; 
x = x + 1; 
return f(x,c) * x; 

}

(A) 3024

(B) 6561

(C) 55440

(D) 161051

Solution

Q.42 What is the return value of f(p,p), if the value of p is initialized to 5 before the call? Note that the first parameter is passed by reference, whereas the second parameter is passed by value.

int f (int &x, int c) {

c = c - 1; 
if (c==0) return 1; 
x = x + 1; 
return f(x,c) * x; 

}

(A) 3024

(B) 6561

(C) 55440

(D) 161051

Solution[edit]