程序代码：

#include <iostream>
using namespace std;
#include <iomanip>

int Fd(int x, int y)
{
    int t = 1;
    int k = 1;
    for(int i = y; i > x ; i--)
    {
        t = t * i;
        t = t / k;
        k++;
    }
    return t;
}

int main()
{
    int nsize;
    cout<<"请输入大小"<<endl;
    cin>>nsize;
    for(int i = 0; i <= nsize; i++)
    {
        for(int k = 0 ; k <= nsize; k++)
        {
            if(k > i)
            {
                cout<<"  ";
            }
        }
        for(int j = 0 ; j <= i; j++)
        {
            cout<<setw(3)<<Fd(j,i)<<"  ";
        }
        cout<<endl;    
    }
    return 0;
}
    
    

程序代码：

#include <iostream>
using namespace std;
#include <iomanip>

int Fd(int x, int y)
{
    int t = 1;
    int k = 1;
    for(int i = y; i > x ; i--)
    {
        t = t * i;
        t = t / k;
        k++;
    }
    return t;
}

int main()
{
    int nsize;
    
    while(1)
    {
        cout<<"请输入大小"<<endl;
        cin>>nsize;
        
        if(0 == nsize)   //输入0，退出！
        {
            exit (0);
        }
        
        for(int i = 0; i <= nsize; i++)
        {
            for(int j = 0 ; j <= i; j++)
            {
                cout<<setw(3)<<Fd(j,i)<<"  ";
            }
            cout<<endl;    
        }
    }
    return 0;
}