方阵操作方法集

方阵的生成 读写文件 转置和显示

#include <iostream>
#include <math.h>
#include <time.h>
#include <fstream>
#include <iomanip>
using namespace std;


template<class T>
int inline size(T type,char *file) {
	ifstream in(file);
	in.seekg(0,ios::end);
	int size=in.tellg()/sizeof(type);
	in.close();
	return size;
}
template<class T>
void showMatrix(T** matrix,int size)
{
	for(int i=0;i<size;++i)
	{
		for(int j=0;j<size;++j)
		{
			cout<<matrix[i][j]<<" ";
		}
		cout<<endl;
	}
}
template<class T> 
int readMatrix(char* file,T **matrix,int size)
{
	ifstream in(file,ios::binary);
	if(in==NULL)
	{
		cout<<"error"<<endl;
		return 0;
	}
	cout<<"start reading"<<endl;
	for(int i=0;i<size;++i)
	{
		in.seekg(i*size*sizeof(T),ios::beg);//each time read a line
		in.read((char*)matrix[i],size*sizeof(T));
	}
	in.close();
	cout<<endl;
	return 1;
}
template<class T>
bool generateMatrix(char* file,T **matrix,int size)
{
	srand(unsigned(time(0)));
	cout<<"start generating"<<endl;
	for(int i=0;i<size;++i)
	{
		for(int j=0;j<size;++j)
		{
			matrix[i][j]=(T)rand();
		}
	}
	return writeMatrix(file,matrix,size);
}
template<class T> 
int writeMatrix(char* file,T** matrix,int size)
{
	ofstream out(file,ios::binary);//write binary
	if(out==NULL)
	{
		cout<<"error"<<endl;
		return false;
	}
	cout<<"write"<<endl;
	for(int i=0;i<size;++i)
	{
		out.write((char*)matrix[i],size*sizeof(T));//append to file
	}
	out.flush();
	out.close();
	cout<<endl;
	return 1;
}
template<class T>
bool compareMatrix(T** a,T** b,int size)
{
	bool same=true;
	for(int i=0;i<size&&same;++i)
	{
		for(int j=0;j<size&&same;++j)
		{
			same&=(a[i][j]==b[i][j]);
			if(!same)
			{
				cout<<i<<" "<<j<<" "<<a[i][j]<<" "<<b[i][j]<<endl;
			}
		}
	}
	return same;
}

//get the transpositioned matrix
template<class T>
void matrixTransposition(T** matrix,int size)
{
	T temp;
	for(int i=1;i<size;++i)
	{
		for(int j=0;j<i;++j)
		{
			temp=matrix[i][j];
			matrix[i][j]=matrix[j][i];
			matrix[j][i]=temp;
		}
	}
}