Error Message: undefined reference to 'printHeader()' & undefined reference to 'calculateArea(double&)'

Error Message: undefined reference to 'printHeader()' & undefined
reference to 'calculateArea(double&)'

References

Reference NO 1

http://stackoverflow.com/questions/15165798/error-message-undefined-reference-to-printheader-undefined-reference-to

Reference NO 2

http://www.pressingquestion.com/1090813/Undefined-Reference-To-%60__android_log_print

Reference NO 3

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Reference NO 4

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Reference NO 5

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Reference NO 6

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Reference NO 7

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Reference NO 8

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