C programs post2

Q 6.)
#include
int main()
{
int a=3, b = 5;

printf(&"Ya!Hello! how is this? %s\n"[a], &b["junk/super"]);
printf(&"WHAT%c%c%c %c%c %c !\n"[a], 1["this"],
2["beauty"],0["tool"],0["is"],3["sensitive"],4["CCCCCC"]);
return 0;
}


is this a valid c program....



Q 7.)
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; }


Why does it happen so?



Q 8.)

#include
#define f(a,b) a##b
#define g(a) #a
#define h(a) g(a)

int main()
{
printf("%s\n",h(f(1,2)));
printf("%s\n",g(f(1,2)));
return 0;
}

guess the output...




Q 9.)

#include
int main()
{
int a = 1,2;
printf("a : %d\n",a);
return 0;
}


is this valid C program..
if yes..
what is the output of this C program..
say it without executing..
silly question..



Q 10.)
if this happens that u have to multiply a number by 7 without using * sign..
which of the answer u will choose..
justify ur answer....

x = (x<<3)-x;

or

x=(x<<2) + (x<<1) + x