12. The atoi and itoa Macros

• The

  • atoi (ASCII to integer), and

  • itoa (integer to ASCII)

  macros are the word-length (16-bit) versions of atod and dtoa.

• The atoi macro scans a string of characters and produces the corresponding word-length 2's complement value in AX.

• The itoa macro takes the 2's complement value stored in a word-length source and produces a string of exactly six characters representing this value in decimal format.

• The macros are useful when dealing with values in the range

  • -32,768 to 32,767.