Consider this C code to swap two integers and these five statements :
void swap (int * px, int * py)
{
* px = *px – *py ;
*py = *px + *py;
*px = *py – *px;
}
S1 : Will generate a compilation error
S2 : May generate a segmentation fault at runtime depending on the arguments passed
S3 : Correctly implement the swap procedure for all input pointers referring to integers stored in memory locations accessible to the process
S4 : Implements the swap procedure correctly for some but not all valid input pointers.
S5 : May add or subtract integers and pointers.
(A) S1 (B) S2 and S3 (C) S2 and S4 (D) S2 and S5
