do-while巢狀迴圈 數字三角形矩陣

#include 
#include 
#include  
using namespace std;

int main(int argc, char *argv[])
{
 int outer = 1;
 do
 {
  int inner = 1;
  do
  {
   cout << setw(3) << inner;
  } while (inner++ <= 5-outer);
  cout << endl;
 } while (outer++ <= 4);
 system("PAUSE");
 return EXIT_SUCCESS;
}