#include <iostream>
#include <fstream>
using namespace std;
int main()
{
//ifstream fin("d:\\test2.txt");
ofstream fout("d://test2.txt");//打开文件
int a[30][30];//定义一个二为数组
int i,j,k=2,count;
int lines;
cout<<"enter the line:";
cin>>lines;
k=lines;
for(i=0;i<lines;i++)
{
count=i+2;
a[i][0]=(i*(i+1))/2+1;
cout<<a[i][0]<<"\t";
fout<<a[i][0]<<' ';
for(j=1;j<k;j++)
{
a[i][j]=a[i][j-1]+count;
cout<<a[i][j]<<"\t";
//fin>>a[i][j];
fout<<a[i][j]<<' ';//将数据写入文件
count++;
}
fout<<endl;
k=k-1;
cout<<endl;
}
return 0;
}
