As you learned in the chapter, you must be careful when comparing two real numbers for either equality or inequality because some real numbers cannot be stored precisely in memory. To determine whether two real numbers are either equal or unequal, you should test that the difference between both numbers is less than some acceptable small value, such as $0\mathrm{.}00001.$

a$.$ Start your C$++$ development tool, and view the Advanced$16.$cpp file. The file is contained in either the Cpp$8\backslash$Chap$05\backslash$Advanced$16$ Project folder or the Cpp$8|$Chap$05$ folder. $($Depending on your C$++$ development tool, you may need to open this exercise's solution$/$project file first.$)$ The code divides the contents of the num $1$ variable $(10\mathrm{.}0)$ by the contents of the num $2$ variable $(3\mathrm{.}0),$ storing the result $($approximately $3\mathrm{.}33333)$ in the quoti ent variable. An if statement is used to compare the contents of the quoti ent variable with the number $3\mathrm{.}33333.$ The if statement displays a message that indicates whether the numbers are equal.

b$.$ Run the program. Even though the message on the screen states that the quotient is $3\mathrm{.}33333,$ the message indicates that this value is not equal to $3\mathrm{.}33333.$ Close the Command Prompt window.