Count Alphabets Digits and Symbols in a String

#include <stdio.h>
#include <stdint.h>
#include<string.h>
void classify_chars(const char *str, uint8_t *alpha, uint8_t *digit, uint8_t *symbol) {
   int n=strlen(str);
   uint8_t a=0,d=0,s=0;
   for(int i=0;i<n;i++){
    if((str[i]>='A'&&str[i]<='Z') || (str[i]>='a'&&str[i]<='z'))
    a++;
    else if(str[i]>='0' && str[i]<='9')
    d++;
    else
    {
        if(str[i]!=' ')
        s++;
    }
   }
   *alpha=a;
   *digit=d;
   *symbol=s;
}

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;
}