(Drawing Patterns with Nested for Loops) Write a program that uses for statements to print the following patterns separately, one below the other. Use for loops to generate the patterns. All asterisks (*) should be printed by a single statement of the form cout << '*'; (this causes the asterisks to print side by side). [Hint: The last two patterns require that each line begin with an ap- propriate number of blanks. Extra credit: Combine your code from the four separate problems into a single program that prints all four patterns side by side by making clever use of nested for loops.]

Question

What will be an ideal response?

Answer 1

Extra-credit solution that prints the triangles side by side:
```
// Create triangles of asterisks side-by-side using nested for loops
#include
using namespace std;

int main()
{
int row; // the row position
int column; // the column position
int space; // number of spaces to print

// print one row at a time, tabbing between triangles
for ( row = 1; row <= 10; row++ )
{
// first triangle
for ( column = 1; column <= row; column++ )
cout << "*";

for ( space = 1; space <= 10 - row; space++ )
cout << " ";

cout << "\t";

// second triangle
for ( column = 10; column >= row; column-- )
cout << "*";

for ( space = 1; space < row; space++ )
cout << " ";

cout << "\t";

// third triangle
for ( space = 1; space < row; space++ )
cout << " ";

for ( column = 10; column >= row; column-- )38 cout << "*";
cout << "\t";

// fourth triangle
for ( space = 10; space > row; space-- )
cout << " ";

for ( column = 1; column <= row; column++ )
cout << "*";

cout << endl;
} // end for
} // end main
```