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
    int len = 0;
    while (*(str + len) != '\0') {
        len ++;
    }
    for (int i = 0; i < len; i ++) {
        char ch = *(str + i);
        if (((ch >= 'A') && (ch <= 'Z')) || ((ch >= 'a') && (ch <= 'z'))) {
            (*alpha) += 1;
        }
        else if (ch >= '0' && ch <= '9') {
            (*digit) += 1;
        }
        else if (ch != ' ') {
            (*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;
}