K&R Exercise 1-9 (C)

Question

\"Write a program to copy its input to its output, replacing each string of one or more blanks by a single blank.\"

I\'m assuming by thi

Answer 1

Pseudo code

while c = getchar:
    if c is blank:
        c = getchar until c is not blank
        print blank
    print c

C

You can substitute use of isblank here if you desire. It is unspecified what characters contrive blank, or what blank value is to be printed in place of others.

After many points made by Matthew in the comments below, this version, and the one containing isblank are the same.

int c;
while ((c = getchar()) != EOF) {
    if (c == ' ') {
        while ((c = getchar()) == ' ');
        putchar(' ');
        if (c == EOF) break;
    }
    putchar(c);
}