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8.10 PROJECT 7—CALCULATOR 167
FIG. 8.27 Enabling local echo on Putty.
8.10 PROJECT 7—CALCULATOR
8.10.1 Description
This is a simple calculator program that can perform the basic operations of addi-
tion, subtraction, multiplication, and division. The user enters two numbers and the
required operation. The result is displayed on the PC screen. The process is repeated
after 5s delay.
8.10.2 Aim
The aim of this project is to show how the various serial communication functions and con-
trol codes can be used in a program.
8.10.3 The PDL
The PDL of the program is very simple and is given in Fig. 8.28.
