New to c programming...don't know where to start

[Witnesses]

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[dargueta]

First off, start by creating your main function, and declaring your variables, such as double radius, double height, etc. Then use scanf to input the values, and printf to print them out.

[Witnesses]

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[WingedPanther]

It looks like you're going in the right direction. Now, have you run it with test data to make sure you get the correct results? Compare the program's output to what you get by hand for the same data.

[dargueta]

Your surface area formula is only right if the cylinder has an open top. The second part should be 2*PI*rad*rad. Otherwise, it looks like your code is correct. You might want to check the input for negative values just for more error-catching. Otherwise, it's pretty good. Nice clean code.