梭形 图案

#include<iostream>using namespace std;int main(){  int i,j,n=6;    i=1;  while(i<=6)  {   j=1;   while(j<=n-i)   {cout<<' ';   j=j+1;   }   j=1;   while(j<=2*i-1)   {cout<<'*';   j=j+1;   }   cout<<endl;   i=i+1;  }     while(i<=11)  {       j=1;        while(j<=i-6)  {   cout<<' ';      j=j+1;  }     j=21;   while(j>=2*i-1)   {   cout<<'*';      j=j-1;   }  cout<<endl;  i=i+1;  }  return 0;}