13. The atoi and itoa Example

• Sample program ATOI_ITOA_DEMO.ASM ( download ) demonstrates usage of atoi and itoa Macros:

      .DATA           ; Begin initialized data segment
          buffer      BYTE    8 DUP (?), 0 ; note terminating zero
          ..
      .CODE           ; Code segment
          ..
          input   buffer, 8  ; Read zero to 6 ASCII characters
          atoi    buffer     ; Convert string to 2's complement number
          jno     @F         ; Check the overflow flag
          ; Handle input error:
          ..
      @@:
          ; Success: result of conversion is in AX
          itoa    buffer, ax ; Convert 16-bit signed integer to string
          ..