#include <iostream.h>
void trgl(unsigned int);//正三角
void re_trgl(unsigned int);//反三角
void main()
{
unsigned int k;
cout<<"请输入要打印的行数: ";
cin>>k;
trgl(k);
re_trgl(k);
}
void trgl(unsigned int n)//正三角
{
unsigned i,j;
for(i=1;i<=n;i++)
{
for(j=1;j<(n-i+1);j++)
cout<<' ';
for(j=1;j<=2*(i-1);j++)
cout<<'*';
cout<<endl;
}
}
void re_trgl(unsigned int n)//反三角
{
unsigned i,j;
for(i=1;i<=n;i++)
{
for(j=1;j<=(i-1);j++)
cout<<' ';
for(j=1;j<=(2*(n-i)+1);j++)
cout<<'*';
cout<<endl;
}
}