Notice the definition of the member function input of the class Money given in Display 11.3. If the user enters certain kinds of incorrect input, the function issues an error message and ends the program. For example, if the user omits a dollar sign, the function issues an error message. However, the checks given there do not catch all kinds of incorrect input. For example, negative amounts of money are supposed to be entered in the form –$9.95, but if the user mistakenly enters the amount in the form $–9.95, then the input will not issue an error message and the value of the Money object will be set to an incorrect value. What amount will the member function input read if the user mistakenly enters $–9.95? How might you add additional checks to catch most errors caused by such a misplaced minus sign?
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