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Passing parameters to a function

How do I write a function where the number of parameters it takes
varies?

This is what I have but it doesnt work.

// function prototype
void functionThree(i nt num1=1, int num2=2, int num3=3);

int main()
{
int number1 = 10;
int number2 = 20;
int number3 = 30;

cout << "Values when passing no parameters:\n";
functionThree( , , );

cout << endl << endl;

cout << "Values when passing one parameter:\n";
functionThree(n umber1, , );

cout << endl << endl;

cout << "Values when passing two parameters:\n";
functionThree(n umber1, number2, );

cout << endl << endl;

cout << "Values when passing all three parameters:\n";
functionThree(n umber1, number2, number3);

return 0;
}

void functionThree(i nt num1, int num2, int num3)
{
int sum;
sum = 0;

cout << num1 << endl
<< num2 << endl
<< num3 << endl;

sum = num1 + num2 + num3;

cout << num1 << " + " << num2 << " + " << num3
<< " = " << sum << endl;
}

--
Thanks,
Chris

Nov 7 '07 #1
2 1952


To call the function with our opassing the parameter:

functionThree() ;
functionThree(7 8);
functionThree(5 6,23);
functionThree(1 00,200,300);

Nov 7 '07 #2
On Nov 6, 8:46 pm, Martin.YorkAma. ..@gmail.com wrote:
To call the function with our opassing the parameter:

functionThree() ;
functionThree(7 8);
functionThree(5 6,23);
functionThree(1 00,200,300);
Thanks Martin. Obviously I'm new to this.

--
Chris

Nov 7 '07 #3

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