Thread: alternate for loops? possible?

Is there a way to make a compiler execute 2 for loops simultaneously and the loops are alternate so that:

Code:

for loop1:
		for (a=0; a<unknown1 ; a++)
		{
		cout<<"a"<<a<<" ";
		}

for loop2:
		for (b=0; b<unknown2 ; b++)
		{
		cout<<"b"<<b<<" ";
		}

output:
a0 b0 a1 b1 a2 b2 a3...

?