SOLVED: Write a C program to calculate the area and circumference of a circle. The user should be prompted to enter the circle's radius (which may be any non-negative number). The value of the radius should be declared as a named constant using the const keyword. Remember, constants are in UPPERCASE. Use the value 3.14159 to approximate, as described in section 2.16. The area and circumference should always be output as floating point numbers, regardless of whether the radius is input as an in

Area of a circle

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