C Program to Remove all Characters in a String Except Alphabet

#include<stdio.h>
#include<conio.h>
void main()

{

  char str[100];

  int i,j;

  printf("Enter a string: ");

  gets(str);

  for(i=0; str[i]!='\0'; i++)

  {

  while (!((str[i]>='a'&&str[i]<='z') || (str[i]>='A'&&str[i]<='Z' || str[i]=='\0')))

    {

    for(j=i;str[j]!='\0';j++)

      {

        str[j]=str[j+1];

      }

    str[j]='\0';

    }

  }

  printf("Output String: ");

  puts(str);

  getch();
}

OUTPUT:

C Program to Manipulate String without Use of Manipulation Functions >>