运行后答案与教材一样，但是我理解不到“！”这是怎么得到的？

Question

#include<iostream.h>#include<string.h>union PERSON{int age;float weight;char name[25];};void print(PERSON one){cout <<one.name<<"\t"<<one.age<<"\t"<<one.weight<<"\n";}void main(){PERSON all={33};print(all);all.weight=80;print(all);strcpy(all.name,"ding");print(all);}

Answer 1

union 是共用地址
all={33};
all.age=33; all.name[0]=33;
33就是 ! 的ASCII码