题目内容

Let all variables have been correctly defined. To assign values 10 and 20 to variables a1 and a2, and to assign characters X and Y to variables c1 and c2, use scanf ("%d%c%d%c", &a1, &c1, &a2, &c2); statement. The correct input form shown below is ( ). (Note:□ stands for space character)

A. 10□X□20□Y
B. 10□X20□Y
C. 10□X20□Y
D. 10X20Y

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