C++ Show Growing and Shrinking Number Set

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
int a, length;
printf("Enter length: ");
cin >> length;
a = length / 2;

for (int b = 1; b <= a; b++)
{
for (int c = 1; c <= b; c++)
{
cout << c;
}

cout << endl;
} for (int e = a-1; e >= 1; e--)
{

for (int d = 1; d <= e; d++)
{
cout << d;
}

cout << endl;
}

cin.get();
cin.get();
}

Output