Question

XCORE Question 1 Consider the following program void Elint x, int y Y = y + 1 cout<<x<<"*«y << endl; void nain) 1 int i, a13): all) = 15; a 2) - 203 a13) = 25; cout <i«"" <all) <<"" << a12) << ""« a[3] << endl; cout <i<** <all) << "" << a12) <<""« a[3] << endl; What values of the variable and array A are printed with the following rules. a parameters are passed by value bi parameters are passed by reference Timele. 1:12:16 eters are passed by name res

Answer 1

6 parameters are The memory passed by reference, address of the stored data is passed. Changes to the value have an effect on the original data. void f (int &x, int fy) { X=Xt1 i yay+1; } fli , ati]); # #1,15 f (int &x, put &y){ X = X+1; " X = 1+1 y=Y+1; 11 y=15+1 il y X=2 y=16 ily i=2 , a[+]=16. f (a[i], i); 111=2. a[2]=20 1x X=X+1 i 11 X=2011 y=4+1 i ll y = 2+1 til., X=21 > y=3 il, a[2] =21 i = 3 . i = 3, a(+]=16 , a[2]= 21 , a[3] = 25

© parameters ale passed by rame Call by name is similar to call by reference. If differs from call by reference in that the parameter is not evaluated before the procedure is called. It ů evaluated when only to and only when the parameter is actually wed. flp, atr]) 1141, a[2]); flint x, inty) X = Xt1;ll=It I > y=y+1; 1 y=15+1 } f Caris, i) ill f (9[z], 2) X= X+) ; 11 X=2017 y=Y+1; 11 j = 2+12 :. i: 3 , alt] =16 , a[2]=21, a[s] =25 @ parameters are passed by value-refult It consists of pass by value when the function ý called and then when it terminates, assign the current value of the formal parameter in the function called back to the actual parameter.

fli, ali]); || f (1,8(43) » X=1t 1 > y=15+1 flali), i); 11 f(a[], 2) s X=2041 > y=2+1 .. - 3 a[+]= 16 a[»]=84 aß1-25 There is no change in output. It is just the back and implement which differs.