Thread: One problem at a time.

Okay I know this snippit here has a ton of problems but there is one inparticular that is troubling me.

Under the GATHER DATA section, When a number is entered it is checked via a validate function. Obviously if its not valid then it generates an error. The problem Im having is once Valid function fires and the error is generated, how can I get the NEW number entered to go back through the same while statement to validate this new number?

Code:

int main (void)
{
	int maxnum;
	int a;
	char buff[BUFSIZ];

	printf("How many numbers would you like to sort?\n");
	scanf("%d", &maxnum);
	printf("\nPlease begin entering your %d numbers.\n", maxnum);
  
// GATHER DATA
	for( a = 0; a < maxnum; a++)
	{
		printf( "Enter number %d : ", a + 1 );
		scanf( buff, BUFSIZ, stdin );

		while( !valid( buff, strlen(buff) ) ) 
		{
			printf( "Invalid Integer.\n" );
			printf( "Please re-enter number %d: ", a + 1 );
			fgets( buff, BUFSIZ, stdin );
		}

		sscanf( buff, "%lf", buff );
	}

  return 0;
}

WHOA! very cool.

I was using a double at the end because my function (see below) worked better if I used it.

Code:

static int valid( char array[], int count )
{   
	int i = 0, decCount = 0, negCount = 0;

	for( i = 0; i < count; i++)
  {
		if( array[i] == '\n' ) continue;

		if(( array[i] < '0' || array[i] > '9' ) && array[i] != '.' && array[i] != '-')
		return BOOL_TRUE;
		
		if( array[i] == '.' )
			decCount++;
		else if( array[i] == '-' )
			negCount++;

		if( decCount > 1 || negCount > 1 )
			return BOOL_FALSE;
	}
	return BOOL_TRUE;
}