char y 1，y2；

scanf("%d%c%d%c "，& ampx 1。 y 1。 x2，& ampy2)；

If x 1, x2, y 1 and y2 are required, the correct data input is (). (Note: └┘ stands for space)

a. 10a└┘20b b. 10└┘a20b？

└┘A└┘20└┘ B D. 10A20└┘B

& gt& gt& gt& gtA

If the variable has been correctly described as a floating-point type, it is necessary to pass the statement scanf ("%f% f ",&; First, & ampb & amp；; c)； Give A 10.0, B 22.0, C 33.0. The incorrect input form is ().

a . 10 & lt； Enter > B.10.0,22.0, < enter >

22< input >

33

C. 10.0 input > D.10 22 <; Enter >

22.0 33.0 < input > 33 < input >

& gt& gt& gt& gtB

There are the following procedures. If the values of x 1, x2, y 1 and y2 are required to be 10, 20, a and b respectively, the correct data input is (). (Note: └┘ stands for space)

int x 1，x2；

char y 1，y2；

scanf("%d%d "，& ampx 1。 x2)；

scanf("%c%c "，& ampy 1。 y2)；

a . 1020 ab b. 10└┘20└┘abc

c. 10└┘20<； Enter > D. 10└┘20AB.

ab blood type

& gt& gt& gt& gtD

There are the following program segments, and the corresponding correct data input is ().

Floating point x, y;

scanf("%f%f "，& ampx & amp； y)；

printf("a=%f，b=%f "，x，y)；

A.2.04 < input > B.2.04, < input >

5.67 < input >

C.A=2.04, b = 5.67 < input > d.2.055.67 <; Enter >

& gt& gt& gt& gtA

There is only one rule, that is, the format in scanf and the actual input format must match exactly.