Write a program in C to count the number of vowels and consonants in a string using a pointer

#include <stdio.h>
int main() 
{
	char line[150];
	int vowels, consonant, digit, space,i;
	vowels = consonant = digit = space = 0;
	
	printf("Enter a line of string: ");
	fgets(line, sizeof(line), stdin);
	
	for(i = 0; line[i] != '\0'; ++i) 
	{
if (line[i] == 'a' || line[i] == 'e' || line[i] == 'i' ||line[i] == 'o' || line[i] == 'u' || line[i] == 'A' ||line[i] == 'E' || line[i] == 'I' || line[i] == 'O' ||line[i] == 'U') 
		{
			++vowels;
		} 
else if ((line[i] >= 'a' && line[i] <= 'z') || (line[i] >= 'A' && line[i] <= 'Z')) 
		{
			++consonant;
		} 
		else if (line[i] >= '0' && line[i] <= '9') 
		{
			++digit;
		} 
		else if (line[i] == ' ') 
		{
			++space;
		}
	}
	printf("Vowels: %d", vowels);
	printf("\nConsonants: %d", consonant);
	printf("\nDigits: %d", digit);
	printf("\nWhite spaces: %d", space);
	return 0;
}