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) {
    // Your logic here
    int leng=strlen(str);
  
    for(char i=0;i<leng;i++){
        if((str[i]>='A' && str[i] <= 'Z')||(str[i]>='a' && str[i]<='z')) 
        {
            (*alpha)++;
        }
        else if(str[i]>= '0' && str[i]<= '9'){
            (*digit)++;
        }
        else if((str[i]>='!' && str[i]<= '/') || (str[i]>=':' && str[i]<='@') || (str[i]>'[' && str[i]<'`'))  {
            (*symbol)++;
        }
        
    }
}

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;
}