Exercise 1-9

Exercise 1-9  Write a program to copy its input to its output, replacing each string of one or more blanks by a single blank.

#include <stdio.h>

int main(void)

{

  int c;

  int space = 0;

  while (c=getchar(), c!=EOF)

  {

    if (c==' ')

    {

      if (!space)

        putchar(c);

      space = 1;

    }

    else

    {

      space = 0;

      putchar(c);

    }

  }

  return 0;

}