Recursion Example

n=1
r = 1
x = 2

int
factr(int n)
{
	if(n == 1) return 1;
	int r = factr(n-1);
	int x = n * r;
	return x;
} // factr

n=2
r = 1
x = 2

int
factr(int n)
{
	if(n == 1) return 1;
	int r = factr(n-1);
	int x = n * r;
	return x
} // factr

n=3
r = 2
x = 6

int
factr(int n)
{
	if(n == 1) return 1;
	int r = factr(n-1);
	int x = n * r;
	return x;
} // factr

argc=1
argv[0]="main"
res = 6

int
main(int argc, char * argv[])
{
int res = factr(3);
cout << "res = " << res << endl;
return 0;
} // main