Call by reference, functions

Mar 3, 2015 at 6:14pm
I am having trouble validating the operator. The user has to input the operator they want to use and if they don't input any of the four, I want to print out that the operator is invalid. I am also having trouble figuring out how to output the result.



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Last edited on Mar 4, 2015 at 8:15pm
Mar 3, 2015 at 7:19pm
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