What is printed after execution of each of the following C-programs?

What is printed after execution of each of the following C-programs?

1. void main()
   {f
   loat reals[5];
   *(reals+1) = 245.8;
   *reals = *(reals + 1);
   printf(“ %f”, reals[0] );
   }
2. void main( )
   { int nums[3];
   int ptr = nums; nums[0] = 100; nums[1] = 1000; nums[2] = 10000; printf( “%d\n”, ++ptr );
   printf( “%d”, *ptr );
   }
   
3. void main()
   { int digit =
   0;
   while (digit <= 9)
   printf( “%d\n”, digit++);
   }
4. void main()
   { int a=7, b=6;
   fun1(a,b);
   printf(“\n a is %d b is %d”, a, b);
   }
   int fun1(int c,int d)
   { int e;
   e = c * d;
   d = 7 * c;
   printf(:\n c is %d d is %d e is %d”, c, d, e);
   return;
   }