C++ Code to Remove All Characters Except Letters and Spaces

C++ Code to Remove All Characters Except Letters and Spaces

18:31

Description: In the following C++ Intro. to Computing code, user gives an input string which is taken in a char array and the code removes all characters except LETTERS and SPACE.

#include <iostream>

using namespace std;

int main()

{

     bool nchr=false;

     char input[1000],temp;

     int lenght,i=0,j=0,k;

    

cout<<"Please enter a string\n\n";

     gets(input);

     

     lenght=strlen(input);

     k=lenght;

    

while(i<k){

           nchr=false;

          

if ( (input[i]<'A' || input[i]>'Z') && (input[i]<'a' || input[i]>'z') && input[i]!=' ' ){

                nchr=true;

                for (j=i;j<k-1;j++){

                     temp=input[j];

                     input[j]=input[j+1];

                     input[j+1]=temp;

                }

           }

           if (nchr==true){

                k--;

                lenght--;

           }

           else

                i++;

     }

     input[lenght]='\0';

     cout<<endl<<input<<endl;

     return 0;

}