Assume i and j are member variables with double type in class X. In the following codes， which one is NOT RIGHT constructor? ( ) A:double X(double k ){ i=k; return i; } B:X(double m， double n ){ i=m

Assume i and j are member variables with double type in class X. In the following codes， which one is NOT RIGHT constructor? ( )

A:double X(double k ){ i=k; return i; }
B:X(double m， double n ){ i=m; j=n; }
C:X( ){i=6;j=8; }
D:X(double k ){ i=k; }
答案: double X(double k ){ i=k; return i; }

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