1. Assignment
1. Display an hourglass pattern
2. #include <iostream>
3. #include <string>
4. #include <sstream>
5. #include <iomanip>
6.
7. using namespace std;
8.
9. const char star = '*';
10.
const char space = ' ';
11.
12.
int main(int argc, char *argv[]) {
13.
int n, m, i = 0, increment = 1;
14.
string in;
15.
stringstream ss;
16.
17.
do {
18.
cout << "Enter height (an odd, positive integer, > 2): ";
19.
getline(cin,in);
20.
ss.clear(); ss.str(in);
21.
} while (!(ss >> n) || (n < 3) || (!(n & 1)));
22.
23.
m = n / 2;
24.
25.
do {
26.
cout << setfill(space) << setw(i + 1) << space;
27.
cout << setfill(star) << setw(n - (2*i)) << star << endl;
28.
i += increment;
29.
if (i == m) increment = -1;
30.
} while (i >= 0);
31.
32.
system("pause");
33. }

2. Using hash ###
#include
#include
#include
#include
<iostream>
<string>
<sstream>
<iomanip>
using namespace std;
const char hash = '#';
const char space = ' ';
int main(int argc, char *argv[]) {
int n, m, i = 0, increment = 1;
string in;
stringstream ss;
do {
cout << "Enter height (an odd, positive integer, > 2): ";
getline(cin,in);
ss.clear(); ss.str(in);
} while (!(ss >> n) || (n < 3) || (!(n & 1)));
m = n / 2;
do {
cout << setfill(space) << setw(i + 1) << space;
cout << setfill(hash) << setw(n - (2*i)) << hash << endl;
i += increment;
if (i == m) increment = -1;
} while (i >= 0);
system("pause");
}

3. 2. Display a diamond pattern
#include <iostream>
using namespace std;
void main()
{
int i, j, k;
int n = 0;
cout << "Program for displaying pattern of *.n";
cout << "Enter the maximum number of *: ";
cin >> n;
cout << "nHere is the Diamond of Starsn";
for (i = 1; i <= n; i++)
{
for (j = 0; j < (n - i); j++)
cout << " ";
for (j = 1; j <= i; j++)
cout << "*";
for (k = 1; k < i; k++)
cout << "*";
cout << "n";
}
for (i = n - 1; i >= 1; i--)
{
for (j = 0; j < (n - i); j++)
cout << " ";
for (j = 1; j <= i; j++)
cout << "*";
for (k = 1; k < i; k++)
cout << "*";
cout << "n";
}
cout << "n";
system("pause");
}

4. 3. Display the Nepal flag
#include <iostream>
using namespace std;
void main()
{
int i, j, k;
int n = 0;
cout << "Program for displaying pattern of *.n";
cout << "Enter the maximum number of *: ";
cin >> n;
cout << "nHere is the Diamond of Starsn";
for (i = 1; i <= n; i++)
{
for (j = 1; j <= i; j++)
cout << "*";
cout << "n";
}
for (i = n - 1; i >= 1; i--)
{
for (j = 1; j <= i; j++)
cout << "*";
cout << "n";
}
for (i = 1; i <= n; i++)
{
for (j = 1; j <= i; j++)
cout << "*";
cout << "n";
}
for (i = n - 1; i >= 1; i--)
{
for (j = 1; j <= i; j++)
cout << "*";
cout << "n";
}
cout << "n";
system("pause");

5. }