prog13.cpp

C++语言程序设计题典

#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>
const int M=3;
const int N=4;
class Array
{
	int A[M][N];
public:
	Array(){}
	friend istream & operator >> (istream &,Array &);
	void disp()
	{
		cout << "输出结果:" << endl;
		for (int i=0;i<M;i++)
		{
			for (int j=0;j<N;j++)
				cout << setw(3) << A[i][j];
			cout << endl;
		}
	}
};
istream & operator >> (istream &in,Array &a)
{
	for (int i=0;i<M;i++)
		for (int j=0;j<N;j++)
			in >> a.A[i][j];
	return in;
}
void main()
{
	ifstream file1("stud.dat");
	Array a;
	file1 >> a;     //调用重载运算符函数
	a.disp();
}