CSCI 240 - Function Worksheet 1

Basics

Answer questions about the 3 function prototypes below.

long int Factorial(int );

double FindAverage(double , int );

void PrintTitle(string , int , int );

1. What type of value will each function return?

• Factorial __long integer___

• FindAverage __double______

• PrintTitle __nothing is returned__

2. How many arguments does each function expect?

• Factorial _____one__________

• FindAverage _____two__________

• PrintTitle ______three________

3. Write a calling statement for each function using constant values as arguments. (Use values like 1, 2, 3.5, "Mary", not num1, name etc.)

• Factorial ____answer = Factorial(7);______________________

• FindAverage ___average = FindAverage(1234.78, 23);________

• PrintTitle _____PrintTitle("INVOICE", 82, 4);___ ____________

NOTE that Factorial and FindAverage are assignment statements because they return a value. If they are not called with an assignment statement the returned value is lost. PrintTitle does not need an assignment. It does its job and returns.

4. Write a calling statement for each function using variables as arguments.

The following variables would be declared in the calling function, not the function being called.

	int	num1, column, row, count;
	double  sum;
	string  name;

• Factorial ____answer = Factorial(num1);___________________

• FindAverage ___average = FindAverage(sum, count);__________

• PrintTitle _____PrintTitle(name, column, row);________________

NOTE: When you call a function you do not need to know the variable names that the function uses for the arguments.