單項(xiàng)選擇題
以下程序不用第三個(gè)變量實(shí)現(xiàn)將兩個(gè)數(shù)進(jìn)行對(duì)調(diào)的操作,劃線處應(yīng)為main(){ int a,b; scanf(" % d%d", &a, &B) .; cin>>a>>b;cout<<"a= "<<a<<<"b = "<<b; a=a+b; b=a-b;a= ______;cout<<"a= "<<a<<"b= "<<b<<end1;}
A.a+b
B.a-b
C.b*a
D.a/b