95. Count Alphabets Digits and Symbols in a String

#include <stdio.h>
#include <stdint.h>

void classify_chars(const char *str, uint8_t *alpha, uint8_t *digit, uint8_t *symbol) {
    // Your logic here
    if(str == NULL || alpha == NULL || digit == NULL || symbol == NULL)
        return;
    int i = 0;
    while(*(str) != '\0')
    {
        if(((*str) >= '0') && ((*str) <= '9'))
        {
            (*digit)++;
        }
        else if(((*str >= 'A' && *str <= 'Z') 
                || (*str >= 'a' && *str <= 'z')))
        {
            (*alpha)++;
        }
        else if(*str != ' ')
        {
            (*symbol)++;
        }
        str++;
    }
}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    uint8_t alpha = 0, digit = 0, symbol = 0;
    classify_chars(str, &alpha, &digit, &symbol);
    printf("Alphabets = %u\nDigits = %u\nSymbols = %u", alpha, digit, symbol);
    return 0;
}