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
    int l=0;
    while(*(str+l)!='\0'){
        l+=1;
    }
    for(int i=0;i<l;i++){
        int a = (int)(*(str+i));
        if((a>=65 && a<=90)||(a>=97 && a<=122)){
            *alpha +=1;
        }
        else if(a>=48 && a<=57){
            *digit += 1;
        }
        else{
            if(a!=32){
                *symbol += 1;
            }
        }
    }
}

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;
}