99. Check if the String Numeric or Alphabetic

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

void classify_string(const char *str) {
    // Your logic here
    int i =0 ;
    int alph =0 ;
    int num =0 ;
    while (str[i]!='\0')
    {   int x = str[i];
         if (((x>=65)&&(x<=90)) || ((x>=97)&&(x<=122)))
         {
             alph = 1;
         }
         else if (((x>=48)&&(x<=57)) || (x== 33))
         {
              num = 1;
   
         } 
        i++;
    }
    if (alph & num)
    {
      printf("MIXED");
      
    }
    else if (alph)
    {printf("ALPHABETIC");
      
    }
    else printf ("NUMERIC");
}

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;
}