Write C++ statements to do each of the following: Output to the screen the value of the decimal-valued variable testSco

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Write C++ statements to do each of the following: 
Output to the screen the value of the decimal-valued variable
testScore, assume the variable already contains a
value
Declare π (PI) as a constant, using the approximate value
3.14159.
Declare a decimal-valued variable named Ft.
Prompt the user to enter a decimal value representing a length in
feet, then read the user’s input into Ft. 
Assume variables V, H, A, B and
C to store decimal values have been declared, and
values for H, A, B and C have
been input. Write a C++ statement to compute the value for V, if
the variables are related by the mathematical formula.below