6.12.cpp

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
void fun1(),fun2(),fun3();
void main()
{
	cout<<"It is in main()."<<endl;
	fun2();
	cout<<"Ti is back main()."<<endl;
}
void fun1()
{
	cout<<"It is in fun1()."<<endl;
	fun3();
	cout<<"It is back in fun1()."<<endl;
}
void fun2()
{
	cout<<"It is in fun2()."<<endl;
	fun1();
	cout<<"It is back in fun2()."<<endl;
}
void fun3()
{
	cout<<"It is in fun3()."<<endl;
}