#include<stdio.h>  int main()  {          int a=10;          switch(a)          {                  case ‘1‘:                      printf("ONE\n");                      break;                  case ‘2‘:                      printf("TWO\n");                      break;                  defa1ut:                      printf("NONE\n");          }          return 0;  }

The following C program segfaults of IA-64, but works fine on IA-32.int main()  {      int* p;      p = (int*)malloc(sizeof(int));      *p = 10;      return 0;  }

Here is a small piece of program(again just 14 lines of program) which counts the number of bits set in a number.Input     Output 0     0(0000000) 5     2(0000101) 7     3(0000111)   int CountBits (unsigned int x )  {      static unsigned int mask[] = { 0x55555555,          0x33333333,          0x0F0F0F0F,          0x00FF00FF,          0x0000FFFF          } ;          int i ;          int shift ; /* Number of positions to shift to right*/          for ( i =0, shift =1; i < 5; i ++, shift *= 2)                  x = (x & mask[i ])+ ( ( x >> shift) & mask[i]);          return x;  }Find out the logic used in the above program.