Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    int length = 0 ; 
    int digit=0;
    int symbol = 0; 
    int alpha=0;
    while (str[length] != '\0')
    {
       
        if (((int(str[length]) >= 65) && (int(str[length]) <= 90)) 
         || ((int(str[length]) >= 97) && (int(str[length]) <= 122)) )
        {
            
            alpha += 1 ; 
        }

        else if (((int(str[length]) >= 48) && (int(str[length]) <= 57)))
        {
            digit += 1; 
        }
        else 
        {
            if (str[length] != 32)
            {
                symbol += 1 ;  
            }
            
        }
        length ++; 
    }
    if (length == digit)
    {
        printf("NUMERIC");

    }
    else if (length == alpha)
    {
         printf("ALPHABETIC");
    }
    else 
    {
        printf("MIXED");
    }

}

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++;
    }

    classify_string(str);
    return 0;
}

Solving Approach