题目内容

All three expressions in a for loop statement may be omitted.

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The following options are legal integers for C language ( ).

A. 10110B
B. s0386
C. 0Xffa
D. x2a2

The constant expressions of each case in the switch statement must have different values.

The loop body in a loop statement is allowed to contain more than one statement, which can not appear as a compound statement.

It is known that the ASCII code value of letter A is 65. If the variable kk is of char type. The following expression that does not correctly determine that the value of kk is an uppercase letter is ( ).

A. kk>='A' && kk<='Z'
B. !(kk>='A' ‖ kk<='Z')
C. (kk+32)>='a' &&(kk+32)<='z'
D. isalpha(kk)&&(kk<91)