2. Functions Are supposed to be fun….

3. Parameter=Door The word parameter is to function as door is to house. A parameter is used to get data into a function through variables. FUNCTION parameter

4. Function Declarations A form that contains a r rr return type, function’s name, and parameter declarations. –d–d–d–double cube(int side); These are written before the main programming section and below the includes.

5. Function Implementation A detailed, complete and executable description of a function. double cube(int side) { return (side*side*side); } These are written after the main programming section.

6. Parameters A formal parameter is found in the function heading in the implementation section. An actual parameter is when you call the function. The number of arguments in a formal parameter is the same as the actual parameter.

7. Function declaration For example #include int cube (int side); void main { int theside; cout<<“enter the side of the cube”; cin>> theside; cout<<“The volume of the cube is “<< cube(theside); getch(); } int cube (int side); { return(side*side*side); } Function implementation actual parameter formal parameter Notice the TYPES in the parameters match?

8. Return Value The function itself can return a value. –Use this if you only have one thing you need from a function. If you need more than one value from a function you can return values using the parameters. –void get_length(int &width, int &length); –use void if you are not returning a value through the function.

9. Generic Functions The function is used for different things that have the same overall appearance. get_side(“length”); get_side(“width”); Implementation int get_side(apstring name); { int side; cout<<“Please enter the “<<name<< “of your figure.” cin>>side; return(side); }

10. Assignment Problem number 6 on page 193. All work should be done in functions. The main section should only call the functions. The input files are the 1st 4 digits of the team name there are 3 teams. The names of the teams can be found in team.txt and the output file is bowl.txt. Listen for more instructions. Sample input files will be given. DUE FRIDAY.