Thread: how do you check for a floating point vlaue in c??

It sounds like you have an infinite loop, something like this maybe? :-)

Code:

while (scanf("%d", &some_int) != EOF)
{
  /* Do stuff */
}

Post your code so I can be sure, it sounds like scanf is choking on a value other than you told it to take.

You avoid it by not using scanf, but if you have to, this is a fix :-)

Code:

int GetNum (int num1)
{
  do
  {
    printf("Enter a positve real number to be computed\n");
    while (scanf("%d", &num1) != 1)
    {
      fprintf(stderr, "Invalid input, please try again: ");
      while (getchar() != '\n')
      {} /* Clear the bad stuff */
    }
  }
  while ( num1 <= 0 );
  
  return num1;
}

or use fgets() and strtol() to verify the input.