Count Alphabets Digits and Symbols in a String

Code

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

void classify_chars(const char *str, uint8_t *alpha, uint8_t *digit, uint8_t *symbol) {
    // Your logic here
    int length = 0 ; 
    while (str[length] != '\0')
    {
       
        if (((int(str[length]) >= 65) && (int(str[length]) <= 90)) 
         || ((int(str[length]) >= 97) && (int(str[length]) <= 122)) )
        {
            
            *alpha += 1 ; 
        }

        else if (((int(str[length]) >= 48) && (int(str[length]) <= 57)))
        {
            *digit += 1; 
        }
        else 
        {
            if (str[length] != 32)
            {
                *symbol += 1 ;  
            }
            
        }
        length ++; 
    }
}

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;
}

Solving Approach