就换个风格

#include<iostream.h>
int main()
{union example
{int num;
char ch[2];
float f;
}u1={100};
cout<<"u1.num="<<u1.num<<endl;
cout<<"u1.ch="<<u1.ch<<endl;
cout<<"u1.f="<<u1.f<<endl;
u1.num=97;
cout<<"u1.num="<<u1.num<<endl;
cout<<"u1.ch="<<u1.ch<<endl;
cout<<"u1.f="<<u1.f<<endl;
u1.ch[0]='b';
cout<<"u1.num="<<u1.num<<endl;
cout<<"u1.ch="<<u1.ch<<endl;
cout<<"u1.f="<<u1.f<<endl;
return 0;
}