1. (A through D) Write a function prototype in c for each of the following (note: you do not have to write the code that implements these functions). Also, show how to call these functions and print the result (it may be desirable to use a variable to store results from functions that return values).

For example:

A function getPI which does not accept any inputs and returns the constant Pi as a double number.

Prototype:

double getPi(void);

Function call/usage:

double x;

x = getPi();

printf("%lf", x);

A. A function systemError which does not accept any parameters or return any values.

B. A function getMax which finds the maximum value of three integers.

C. A function getArea which calculates the area of a triangle given the base and height. The input arguments are type double.

D. A function printChar that accepts and prints a character on the screen. This function accepts a char input parameter and does not return a value.