Testing characters in a string: is digit and is alpha : String Compare « String « C / ANSI-C

1. C / ANSI-C
2. String
3. String Compare

Testing characters in a string: is digit and is alpha

#include <stdio.h>
#include <ctype.h>

void main() {

  char buffer[80];               
  int i = 0;                     
  int num_letters = 0;           
  int num_digits = 0;            

  printf("\n string with char and digits:\n");
  gets(buffer);   /* Read a string into buffer  */


  while(buffer[i] != '\0') {
    if(isalpha(buffer[i]))
      num_letters++;             /* Increment letter count     */

    if(isdigit(buffer[i++]))
      num_digits++;              /* Increment digit count      */
  }
  printf("\n The string contained %d letters and %d digits.\n",
                                              num_letters, num_digits);
}


           
       

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