read matrix 3*4 use hwo constructor...check?

[oman]

what wrong with this?

#include <iostream>
#include <fstream>

using namespace std;

struct matrix1
{
	float num;
	float denum;
};

struct matrix2
{
	float num;
	float denum;
};

class fraction
{
	private:
	matrix1 one[3][4];
	matrix2 two[3][4];

	public:
		void read()
		{
			ifstream data;
			
			data.open("matrix.txt");
		
		for(int i=0;i<3;i++)
		{
			for(int j=0;j<4;j++)
			{
				data>>one[i][j].num;
				data.ignore(1,'/');
				data>>one[i][j].denum;
			}
		}

		for(int i=3;i<6;i++)
		{
			for(int j=0;j<4;j++)
			{
				data>>two[i][j].num;
				data.ignore(1,'/');
				data>>two[i][j].denum;
			}
		}
		
		data.close();

		}


	void add()
	{
		float result[3][4];
		float a,b;

		for(int i=3;i<6;i++)
		{
			for(int j=0;j<4;j++)
			{
				a=(two[i][j].denum *one[i][j].num + one[i][j].denum * two[i][j].num);
				b = (two[i][j].denum * one[i][j].denum);
				result[i][j]=a/b;
			}
		}
	}
};

int main()
{
	fraction matrx;
	
	matrx.read();
	matrx.add();

	return 0;
}