module part1;
integer ia,ib;
reg a,b;
wire c;
xor x1(c,a,b);
initial
begin
for(ia=0;ia<=1ia++)
a=ia;
for(ib=0;ib<=1;ib++)
b=ib;#10 $display("a=5d b=%d c=%d",a,b,c);
end
endendmodule