Code:
#include<stdio.h>
#include<conio.h>
#include<iostream.h>
#include<values.h>
#define FileInp "c:\\bai3.inp"
#define FileOut "c:\\bai3.out"
void Doc_File(int **A,int &n)
{
FILE*f=fopen(FileInp,"rb");
fscanf(f,"%d",&n);
*A=new int[n];
for(int i=0;i<n;i++)
{
A[i]=new int[n];
for(int j=0;j<n;j++)
{
fscanf(f,"%d",&A[i][j]);
}
}
fclose(f);
}
void Ghi_File(int **A,int n)
{
FILE*f=fopen(FileOut ,"wb");
fprintf(f,"%d%c",n,13);
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
fprintf(f,"%d",A[i][j]);
fprintf(f,"%c",32);
}
fprintf(f,"%c",13);
}
fclose(f);
}
void Xuat_Mang(int **A,int n)
{
for(int i=0;i<n;i++)
{
for(int j=0;j<n;j++)
{
cout<<A[i][j]<<" ";
}
cout<<endl;
}
}
void main()
{
int n;
int **A;
clrscr();
Doc_File(A,n);
Xuat_Mang(A,n);
Ghi_File(A,n);
delete *A;
getch();
}