95. Count Alphabets Digits and Symbols in a String

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

bool is_alpha(char ch){
    return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z');
}
bool is_digit(char ch){
    return ('0' <= ch && ch <= '9');
}


void classify_chars(const char *str, uint8_t *alpha, uint8_t *digit, uint8_t *symbol) {
    uint8_t i=0;
    while (str[i]!='\0') {
        char c = str[i];
        if (is_alpha(c)){ (*alpha)++;}
        else if (is_digit(c)) {(*digit)++;}
        else if (c == ' '){}// c is space
        else { (*symbol)++; }
        i++;
    }
}

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;
}