Chapter 8

1: putchar(getchar()) is a valid expression; what does it do? Is getchar(putchar()) also valid?
A1: The statement putchar(getchar()); causes the program to read the next input character and to print it; the return value from getchar() is the argument to putchar(). No, getchar(putchar()) is invalid because getchar() doesn't use an argument and putchar() needs one.
2: What would each of the following statements accomplish?

  1. putchar('H');

  2. putchar('\007');

  3. putchar('\n');

  4. putchar('\b');

A2:

  1. Display the H character.

  2. Sound the alert if the system uses ASCII.

  3. Move the cursor to the beginning of the next line.

  4. Backspace.

3: Suppose you have a program count that counts the characters in its input. Devise a command that counts the number of characters in ...

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