阅读下面的程序段: publiC class Sun { public static void main (String args[ ]) { int a=0; for(int i=1;i<=3;i++) { for(int j=1;j<=i;j++) { for(int k=j;k<=3;k++) { a=a+1; } } } System.out.println(A) ; } } 执行上面的3重循环后,a的值为( )。A.3B.9C.14D.21
阅读下面的程序段: publiC class Sun { public static void main (String args[ ]) { int a=0; for(int i=1;i<=3;i++) { for(int j=1;j<=i;j++) { for(int k=j;k<=3;k++) { a=a+1; } } } System.out.println(A) ; } } 执行上面的3重循环后,a的值为( )。
A.3
B.9
C.14
D.21
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