while loops and reprompting user

Hello, I am trying to make a program and so far I am having bad luck. How do you make it where if the if statments are not met, they will reprompt the use to enter another input?
Please do not double post. It clutters the forum, makes searching harder and wastes time of people which will try to solve problem which can be already solved elsewhere

Second post link: http://www.cplusplus.com/forum/beginner/112502/
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