C语言相关程序

#include<iostream.h>
union cf
{
	char clname[30];
	int num;
};
struct teachers
{
	int no;
	char name[32];
	char zc;
	union cf x;
}teach[3];
void main()
{
	int i;
	for(i=0;i<3;i++)
	{
		cout<<"input no:"<<endl;
		cin>>teach[i].no;
		cout<<"input name:"<<endl;
		cin>>teach[i].name;
		cout<<"input zc"<<endl;
		cin>>teach[i].zc;
		if(teach[i].zc=='1')
		{
			cout<<"input suojiangkecheng "<<endl;
			cin>>teach[i].x.clname;
		}
			else if(teach[i].zc=='p')
			{
				cout<<"input lunwenshumu"<<endl;
				cin>>teach[i].x.num;
			}
		else cout<<"input data error"<<endl;
	}
	cout<<"no"<<"\t"<<"name"<<"\t"<<"zc"<<"\t"<<"clname/num"<<endl;
	for(i=0;i<3;i++)
	{
		cout<<teach[i].no<<'\t'<<teach[i].name<<'\t'<<teach[i].zc<<'\t';
		if(teach[i].zc=='1')
			cout<<teach[i].x.clname<<endl;
		else if(teach[i].zc=='p')
			cout<<teach[i].x.num<<endl;
		else
			cout<<"data error"<<endl;
	}
}