test.txt

这个程序模拟了编译器功能

#include<iostream>
#include<string>
double square(double);
using namespace std;
void main()
{
	double length;
	string c; 
	int a,t; 
        a=8+4^5;
	a++;
	--t;
	if(a==4)
	   cout<<a;
	cout<<c;
	cout<<"Input the length :";
	cin>>length;
	cout<<"The square is :"
		<<square(length);
}
double square(double n)
{
	return n*n;
}