Question

How to remove all characters from a string except the alphabets in C

Answer 1

#include <stdio.h>
#include <string.h>
 
void remove_characters_except_alphabets(char s[]) { 
  for (int i = 0, j; s[i] != '\0'; i++) {
      while (!(s[i] >= 'a' && s[i] <= 'z') && !(s[i] >= 'A' && s[i] <= 'Z') && !(s[i] == '\0')) {
         for (j = i; s[j] != '\0'; ++j) {
            s[j] = s[j + 1];
         }
         s[j] = '\0';
      }
   }
}  
 
int main() {
   char s[] = "12C#$ pro#$569489387$gramming-=1!:?...";
 
   remove_characters_except_alphabets(s);
 
   puts(s);
 
   return 0;
}
 
 
 
 
/*
run:
 
Cprogramming
 
*/

 

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