C

#include  int main() 

{ 

int i=30;

printf("%d\n",printf("%d",printf("%d",i))); 

return 0;

} 

C Program

I thought the following C program is perfectly valid (after reading about the comma operator in C). But there is a mistake in the following program, can you identify it?
#include   int main()
 {         
int a = 1,2;     
printf("a : %d\n",a);       
return 0;
} 

Interesting program

Try guessing the output for the below code!!!!!!!!!

What is the output?

(give input as: give me treat)

  #include    int main()
  {
      char dummy[80];
      printf("Enter a string:\n");
      scanf("%[^a]",dummy);
      printf("%s\n",dummy);
      return 0;
  }