C++ Programs To Create Pyramid and Pattern

In this tutorial, we will create a program to print half pyramid, pyramid, inverted pyramid, Pascal’s Triangle and Floyd’s triangle in C++ Programming using control statements.

To understand this example, you should have the knowledge of followingÂ C++ programming topics:

• C++ if, if…else and Nested if…else
• C++ for Loop
• C++ while and do…while Loop
• C++ break and continue Statement
List of Source Code
Print triangle using *, digits, and characters
Print inverted triangle using * and digit
Code to Print pyramid
Code to Print reverse pyramid
Code to Print Pascal’s triangle
Code to Print Floyd’s triangle

```*
* *
* * *
* * * *
* * * * *```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = 1; i <= rows; ++i)
{
for(int j = 1; j <= i; ++j)
{
cout << "* ";
}
cout << "\n";
}
return 0;
}```

Example 2: Program to print half pyramid a using numbers

```1
1 2
1 2 3
1 2 3 4
1 2 3 4 5```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = 1; i <= rows; ++i)
{
for(int j = 1; j <= i; ++j)
{
cout << j << " ";
}
cout << "\n";
}
return 0;
}```

Example 3: Program to print half pyramid using alphabets

```A
B B
C C C
D D D D
E E E E E```

Source Code

```#include <iostream>
using namespace std;

int main()
{
char input, alphabet = 'A';

cout << "Enter the uppercase character you want to print in the last row: ";
cin >> input;

for(int i = 1; i <= (input-'A'+1); ++i)
{
for(int j = 1; j <= i; ++j)
{
cout << alphabet << " ";
}
++alphabet;

cout << endl;
}
return 0;
}```

Programs to print inverted half pyramid using * and numbers

Example 4: Inverted half pyramid using *

```* * * * *
* * * *
* * *
* *
*```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = rows; i >= 1; --i)
{
for(int j = 1; j <= i; ++j)
{
cout << "* ";
}
cout << endl;
}

return 0;
}```

Example 5: Inverted half pyramid using numbers

```1 2 3 4 5
1 2 3 4
1 2 3
1 2
1```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = rows; i >= 1; --i)
{
for(int j = 1; j <= i; ++j)
{
cout << j << " ";
}
cout << endl;
}

return 0;
}```

Programs to display pyramid and inverted pyramid using * and digits

Example 6: Program to print full pyramid using *

```  *
* * *
* * * * *
* * * * * * *
* * * * * * * * *```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int space, rows;

cout <<"Enter number of rows: ";
cin >> rows;

for(int i = 1, k = 0; i <= rows; ++i, k = 0)
{
for(space = 1; space <= rows-i; ++space)
{
cout <<"  ";
}

while(k != 2*i-1)
{
cout << "* ";
++k;
}
cout << endl;
}
return 0;
}```

Example 7: Program to print pyramid using numbers

```   1
2 3 2
3 4 5 4 3
4 5 6 7 6 5 4
5 6 7 8 9 8 7 6 5```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows, count = 0, count1 = 0, k = 0;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = 1; i <= rows; ++i)
{
for(int space = 1; space <= rows-i; ++space)
{
cout << "  ";
++count;
}

while(k != 2*i-1)
{
if (count <= rows-1)
{
cout << i+k << " ";
++count;
}
else
{
++count1;
cout << i+k-2*count1 << " ";
}
++k;
}
count1 = count = k = 0;

cout << endl;
}
return 0;
}```

Example 8: Inverted full pyramid using *

```* * * * * * * * *
* * * * * * *
* * * * *
* * *
*```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = rows; i >= 1; --i)
{
for(int space = 0; space < rows-i; ++space)
cout << "  ";

for(int j = i; j <= 2*i-1; ++j)
cout << "* ";

for(int j = 0; j < i-1; ++j)
cout << "* ";

cout << endl;
}

return 0;
}```

Example 9: Print Pascal’s triangle

``` 1
1   1
1   2   1
1   3   3    1
1  4    6   4   1
1  5   10   10  5   1```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows, coef = 1;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = 0; i < rows; i++)
{
for(int space = 1; space <= rows-i; space++)
cout <<"  ";

for(int j = 0; j <= i; j++)
{
if (j == 0 || i == 0)
coef = 1;
else
coef = coef*(i-j+1)/j;

cout << coef << "   ";
}
cout << endl;
}

return 0;
}```

Example 10: Print Floyd’s Triangle.

```1
2 3
4 5 6
7 8 9 10```

Source Code

```#include <iostream>
using namespace std;

int main()
{
int rows, number = 1;

cout << "Enter number of rows: ";
cin >> rows;

for(int i = 1; i <= rows; i++)
{
for(int j = 1; j <= i; ++j)
{
cout << number << " ";
++number;
}

cout << endl;
}

return 0;
}```