【单选题】试问以下程序输出结果正确的是 #include void main() { int a=16,a1,a2,a3; a1=a++; a2=a++; a3=a++; printf("a1=%d,a2=%d,a3=%d\n",a1,a2,a3); a1=++a; a2=++a; a3=++a; printf("a1=%d,a2=%d,a3=%d\n",a1,a2,a3); }
A.
a1=16,a2=17,a3=18 a1=20,a2=21,a3=22
B.
a1=16,a2=16,a3=16 a1=17,a2=17,a3=17
C.
a1=16,a2=17,a3=18 a1=19,a2=20,a3=21
D.
a1=16,a2=17,a3=18 a1=16,a2=17,a3=18
【单选题】设向量a1=(1 2 0)T,a2=(2 3 0)T,a3=(0 1 -1)T,β=(3 5 k)T,若β可由a1,a2,a3线性表示,则k=( )。
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