typedef和union

//typedef和union#include<stdio.h>typedef int zheng;//把中间的替换成最后的那个名字 union point{ int x; int y;}a;int main(){ zheng i=5; printf("%d",i); scanf("%d",&amp;a.x ); scanf("%d",&amp;a.y ); printf("%d",a.x );//union和struct不同的是 union共用一块空间 .