COM 1100 Professor Fell Quiz 4B October 16, 1997

Use the windows below to show the output of the following code:
(The grid boxes are 20 pixels apart.)

```// function prototypes
int F(int x, int y);
void Conway(int N);
void Rounds();

void main()
{
// open text and drawing windows
TinySquarePair();

//Problem 1----------------------
cout << "Problem 1" << endl;
Conway(4);
cout << endl;
Conway(21);
cout << endl;

//Problem 2----------------------
int	x = 1;
int	y = 3;
cout << "Problem 2" << endl;
cout << endl;
for (int j = 1; j <=5; j++){
x = F(x, y);
cout<< j<<" "<< x<<" "<< y<< endl;
y = y + 3;
}

//Problem 3----------------------
Rounds();

PressReturn();
} // end main

int F(int x, int y){
if (x < y)
return 2*x;
else
return 2*y;
}

void Conway(int N){
if (N <= 0 )
cout << "error" <<endl;

while (N > 1){
cout << N << endl;
if ((N % 2) == 0)
N = N/2;
else
N = 3*N + 1;
}
cout << N << endl;
}

void Rounds(){
int x = 160, y = 160, r = 40;

while ( r > 5){
FrameCircle(x, y, r);
x = x - r;
y = y - r;
r = r/2;
x = x - r;
y = y - r;
}
}
```

Problem 4.
Write a C++ function that returns true if its int argument is even and false otherwise.

Last Updated: October 19, 1997 9:11 am by
Harriet Fell
College of Computer Science, Northeastern University
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