单项选择题
It was no use______ that I had not seen him, so I waved to him.
单项选择题 以下程序的运行结果是 #include<iostream.h> void sub(int x,int y,int *z) *z=y-x; void main( ) int a,b,c; sub(10,5,&
单项选择题 NULL是指
单项选择题 有以下语句,则对a数组元素的引用不正确的是(0≤i≤9) int a[10]=0,1,2,3,4,5,6,7,8,9,*p=a;