Many times a programmer is given an algebraic formula, and must write an assignment statement that will correctly calculate the answer. After writing a statement, check it by hand, using sample values verify that the equation is correct. Use the following guidelines to convert
algebraic expressions to programming statements:
Algebra  Program  Explanation 

XY  x*y  Algebra uses single letters for variables, and can omit the *, programming languages always require an operator. 
X·Y  x*y  Algebra sometimes uses a dot for multiplication. 
x*x  There is no way to type a smaller exponent.  
pow(x,n)  Use #include <math> for power function.  
sqrt(x)  Use #include <math> for square root function.  
(a+b)/c  Compound numerators and divisors must be enclosed in parenthesis: Notice the difference between this example and the one below: 

a/c+b  Notice the difference between this example and the one above. 
Remember: Algebra uses single letters for variables: programmers should use good variable names wherever possible!