// isspace example
// Check if character is a white-space
// that is, space, tab, newline, CF/LF 
// source: http://www.cplusplus.com/

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

char GetUserInput(void);

int main()
{
  char c;
  int i=0;
  char str[]="Example sentence to test isspace\n";
  while (str[i]) {
      c=str[i];
      if (isspace(c)) c='\n';
      putchar(c);
      i++;
  }
  // another part of the program removes whitespaces for input
  printf("You input %c\n", GetUserInput());
  return EXIT_SUCCESS;
}

char GetUserInput(void) {
  printf("\nEnter p, r, s, g, h, e:");
  char c;

  // Checks whether c is a white-space character.
  // including space, newline, tab
  while (isspace( c = getchar()))
    ;
  return c;
}