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) {
    int index = 0;
    while(*str != '\0'){
        //Store the ASCII Vlaue
        int ascii =(int) *str;
        //Check for alphabetical Condition
        if(((ascii >= 65) && (ascii <= 90)) || ((ascii >=97) && (ascii <= 122))) *alpha += 1;
        //Check for spaces & Digits Condition
        else if((ascii >= 48) && (ascii <= 57)) *digit += 1;
        //Check for Symbols and Spaces
        else if(ascii != 32) *symbol += 1;
        //Move the array pointer
        *str++;
    }   
}

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