Chapter 5.5, Problem 23STE

Program Plan Intro

Assert macro:

• It denotes a tool to ensure that expected conditions are true at assert statement location.
• If condition does not meet, then program displays error message and aborts.
• The assert definition is been included in program with statement “#include<cassert>”.
• The statement “assert(bool_expr)” is inserted to use “assert”, the “bool_expr” denotes a Boolean expression that should be evaluated to true.
• The assert statement denotes a macro, that is similar to function.
• The assert macros can be disabled by adding “#define NDEBUG” before include statement.

Given statement:

$x=(x*y/z)$

Explanation:

• The given statement denotes an expression with variables “x”, “y” and “z”.
• It updates the value of “x”.
• The value of “z” should not be zero.
• If the value becomes zero, then it displays division by zero error.