如下语句的输出分别是什么?printf (“%d%d”, 12, 12 + 45);printf (“%d,%d”, 12, 12 + 45);printf (“%d %d”, 12, 12 + 45);printf (“%d%d”, 12, 12 + 45);printf (“%d.%d”, 12, 12 + 45)()
A.12 5712,5712 5712 5712.57 B.125712,5712 5712 5712.57 C.125712,5712 57125712.57 D.12 57 12,57 12 57 1257 12