Tips/common mistakes:#define every constant! Most of you missed at least a few. Recall the guideline: anything that's not 1 or 0 should be #defined, even things that don't aren't likely to change (e.g., number of minutes in an hour). Remember that named constants serve as documentation as well. Function comments should describe at least every parameter and the return value: /* Evaluates a binomial function ax^2 + bx + c. RETURNS: Value obtained by evaluating the binomial. PARAMETERS: base : base variable co1 : square term coefficient co2 : linear coefficient co3 : constant term */ double eval_binomial(double base, double co1, double co2, double co3) { /* etc. */ }Notice, by the way, that I don't have to name the types or order of the parameters in the comment, because that is provided by the function definition.Please comment all constant and variable declarations. Even when the names are self-explanatory, it often helps to break your variable declarations into groups (and comment the groups), especially when there are many declarations in one function. A few students didn't use prototypes, instead opting to define all their function bodies directly at the top of the program. It's much easier to grasp the flow of a program when you get main() near the beginning, and besides it's conventional C style. In the future, please use prototypes.