输出*的图案

#include <iostream>
using namespace std;
int tuan1()
{
for (int i = 1; i <= 10; ++i)
{
cout<<"\t\t\t";
for (int j = 0; j < 11-i; ++j)
{
cout<<"*"<<"  ";
}
cout<<endl;
}
return 0;
}
int tuan2()
{
for (int i = 1; i <= 10; ++i)
{


for (int j = 1; j <= 10-i; ++j)
{
cout<<" "<<"  ";
}
for (int k = 1; k <= 2*i-1; ++k)
{
cout<<"*"<<"  ";
}
cout<<endl;
}
return 0;
}
int tuan3()
{
for (int i = 1; i <= 10; ++i)
{
for (int j = 1; j <= 11-i; ++j)
{
cout<<"*"<<"  ";
}
for (int k = 1; k < i; ++k)
{
cout<<" "<<"  ";
}
cout<<endl;
}
return 0;
}
int main()
{
tuan1();
cout<<endl;
cout<<endl;
cout<<endl;
tuan2();
cout<<endl;
cout<<endl;
cout<<endl;
tuan3();



getchar();
getchar();
return 0;

}