Triangle Printer 2. The existing code reads in a number and prints a series of rows. Modify it so it prints a triangle that looks like the ones shown below.

Question

The existing code reads in a number and prints a series of rows. Modify it so it prints a triangle that looks like the ones shown below.

SizeShape

1

*

2

*

**

3

*

**

***

4

*

**

***

****

Hints:

1. You can print a space with " "
2. How does the number of spaces on each line relate to the current line number and the total number of lines?

Code:

#include <iostream>

using namespace std;

int main()

{

int size;

cin >> size;

for(int row = 1; row <= size; row++) {

cout << "*";

cout << endl;

}

}

Answer 1

using namespace std;

#include <iostream>

#define MAX_LINE (55) //this may vary depending on your system

Go()

{

int n=-1;

while (n<1)

{

cout << "Input positive integer :>";

cin >> n;

if (n>=MAX_LINE)

{

cout << "too many - won't fit, sorry" << endl;

n=-1;

}

}

for (int iLoop=0; iLoop<=n; iLoop++)

{

for (int jLoop=n; jLoop>0; jLoop--)

{

if (jLoop>iLoop)

{

cout << " ";

}

else

{

cout << "*";

}

}

cout << endl;

}

}

main()

{

Go();

}