GeeksforGeeks

float f1 = 0.0f, f2;
do
{
  f2 = f1;
  f1 = f1 + 1;
}
while (f2 != f1);

what will the o/p of this question & why its more important why..?? plz run before commenting

void f (int **mat)
{

}

int main()
{
  int mat[9][9];
  // f(mat); //Doesn't works.
  f ((int **) mat); //Works.
  return 0;
} //Why?