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  1. // HW week1 DSA course 
  2. //1.Print triangles using *, numbers, and characters
  3. //2.Rectangle Pattern
  4. //3. Hollow Rectangle Pattern
  5. //4. Inverted Half Pyramid
  6. //5. Floyd’s Triangle
  7. //6. Butterfly Pattern
  8. //7. Print Pascal's triangle
  9. // 8.Print Full Pyramid Pattern of Stars
  10.  
  11.  
  12.  
  13. #include<iostream>
  14. using namespace std;
  15.  
  16. int main(){
  17.  
  18. 	// 1.Print triangles using *, numbers, and characters
  19.  
  20.    /* int rows;
  21.     // Getting the number of rows.
  22.     cout << "Enter the Number of rows - ";
  23.     cin >> rows;
  24.  
  25.     cout << "Triangle of " << rows << " using * -\n";
  26.  
  27.     for( int i = 0; i < rows; i++ ) {
  28.         for( int j = 0; j <= i; j++ ){
  29.             cout << "*  ";
  30.         }
  31.         cout<<endl;
  32.     }*/
  33.  
  34.  
  35.     //2.Rectangle Pattern
  36.  
  37.     /*int rows, cols;
  38.     // Getting dimensions of the rectangle.
  39.     cout << "Enter the number of rows in rectangle - ";
  40.     cin >> rows;
  41.  
  42.     cout << "Enter the number of columns in rectangle - ";
  43.     cin >> cols;
  44.  
  45.  
  46.     cout << "Rectangle of dimensions " << rows << "*" << cols << endl;
  47.  
  48.     for( int i = 0; i < rows; i++ ) {
  49.         for( int j = 0; j < cols; j++ ){
  50.             cout << "* ";
  51.         }
  52.         cout<<endl;
  53.     }*/
  54.  
  55.    //3. Hollow Rectangle Pattern              
  56.  
  57.   /*   int rows, cols;
  58.   // Getting dimensions of rectangle.
  59.   cout << "Enter the number of rows in rectangle - ";
  60.   cin >> rows;
  61.  
  62.   cout << "Enter the number of columns in rectangle - ";
  63.   cin >> cols;
  64.  
  65.   cout << "Rectangle of dimensions " << rows << "*" << cols << endl;
  66.  
  67.   // Main logic to print hollow rectangle. 
  68.   for (int i = 0; i < rows; i++) {
  69.     for (int j = 0; j < cols; j++) {
  70.  
  71.       // If the index is at the border, then print *. 
  72.       if (i == 0 || i == rows - 1 || j == 0 || j == cols - 1)
  73.         cout << "* ";
  74.       else
  75.         cout << "  ";
  76.     }
  77.     cout << endl;
  78.   }*/
  79.  
  80.   //4. Inverted Half Pyramid
  81.  
  82.  /* int rows;
  83.     // Getting the number of rows.
  84.     cout << "Enter the Number of rows - ";
  85.     cin >> rows;
  86.  
  87.     cout << "Floyd's Triangle of " << rows << " rows." << endl;
  88.  
  89.     // Main logic to print Floyd's Triangle. 
  90.     int counter = 1; 
  91.     for( int i = 0; i < rows; i++ ) {
  92.         for( int j = 0; j <= i; j++ ){
  93.             cout << (counter++) << " ";
  94.         }
  95.         cout << endl;
  96.     }*/
  97.  
  98.  
  99.     //5. Floyd’s Triangle
  100.  
  101.    /* int rows;
  102.     // Getting the number of rows.
  103.     cout << "Enter the Number of rows - ";
  104.     cin >> rows;
  105.  
  106.     cout << "Floyd's Triangle of " << rows << " rows." << endl;
  107.  
  108.     // Main logic to print Floyd's Triangle. 
  109.     int counter = 1; 
  110.     for( int i = 0; i < rows; i++ ) {
  111.         for( int j = 0; j <= i; j++ ){
  112.             cout << (counter++) << " ";
  113.         }
  114.         cout << endl;
  115.     }*/
  116.  
  117.     //6. Butterfly Pattern
  118.  
  119.     /*int rows;
  120.     // Getting the number of rows.
  121.     cout << "Enter the Number of rows - ";
  122.     cin >> rows;
  123.  
  124.     cout << "Butterfly Pattern of " << rows << " rows." << endl;
  125.  
  126.     // Main logic to print the Butterfly pattern.
  127.     // Printing upper part.
  128.     for( int i = 0; i <= rows; i++ ){
  129.         // Print left side stars.
  130.         for( int j = 0; j <= i; j++ ){
  131.             cout << "* ";
  132.         }
  133.         
  134.         // Print spaces.
  135.         int spaces = 2 * (rows - i);
  136.         for( int j = 0; j < spaces; j++){
  137.             cout << "  ";
  138.         }
  139.         
  140.         // Print right side stars.
  141.         for( int j = 0; j <= i; j++ ){
  142.             cout << "* ";
  143.         }
  144.  
  145.         cout << endl;
  146.     }
  147.     
  148.     // Printing bottom part.
  149.     for( int i = rows - 1; i >= 0; i-- ){
  150.         
  151.         // Print left side spaces.
  152.         for( int j = 0; j <= i; j++ ){
  153.             cout << "* ";
  154.         }
  155.         
  156.         // Print spaces.
  157.         int spaces = 2 * (rows - i);
  158.         for( int j = 0; j < spaces; j++){
  159.             cout << "  ";
  160.         }
  161.         
  162.         // Print right side stars.
  163.         for( int j = 0; j <= i; j++ ){
  164.             cout << "* ";
  165.         }
  166.  
  167.         cout << endl;
  168.     }*/
  169.  
  170.     //7. Print Pascal's triangle
  171.  
  172.    /* int rows;
  173.     // Getting the number of rows.
  174.     cout << "Enter the Number of rows - ";
  175.     cin >> rows;
  176.  
  177.     cout << "Pascal's Triangle of " << rows << " rows." << endl;
  178.  
  179.     // Main logic to print Pascal's triangle.
  180.     for( int i = 0; i <  rows; i++){
  181.         int spaces = rows - i;
  182.         // Print spaces.
  183.         for( int j = 0; j < spaces; j++){
  184.             cout<<"  ";
  185.         }
  186.  
  187.         int coefficient;
  188.         // Print values.
  189.         for( int j = 0; j <= i; j++){
  190.             // Update coefficient's value
  191.             if( j == 0 )
  192.                 coefficient = 1;
  193.             else 
  194.                 coefficient = coefficient * (i - j + 1) / j;
  195.  
  196.             cout << coefficient << "   ";
  197.         }
  198.  
  199.         cout << endl;
  200.     }*/
  201.  
  202.  
  203.  
  204.     // 8.Print Full Pyramid Pattern of Stars
  205.  
  206.      int rows;
  207.     // Getting the number of rows.
  208.     cout << "Enter the Number of rows - ";
  209.     cin >> rows;
  210.  
  211.     cout << "Full Pyramid of " << rows << " using * -\n";
  212.  
  213.     // Main logic to print full pyramid. 
  214.     for( int i = 0; i < rows; i++ ) {
  215.         // Print spaces.
  216.         int spaces = rows - i;
  217.  
  218.         for( int j = 0; j < spaces; j++){
  219.             cout <<"  ";
  220.         }
  221.  
  222.         // Print stars.
  223.         for( int j = 0; j < 2 * i - 1; j++){
  224.             cout <<"* ";
  225.         }
  226.  
  227.         cout << endl;
  228.  
  229.     }
  230.  
  231.  
  232.     return 0;
  233. }
  234.  
Success #stdin #stdout 0.01s 5300KB
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Enter the Number of rows - Full Pyramid of 8 using * -
                
              * 
            * * * 
          * * * * * 
        * * * * * * * 
      * * * * * * * * * 
    * * * * * * * * * * * 
  * * * * * * * * * * * * *
https://ideone.com/Au8nc5
language:
C++ (gcc 8.3)
created:
17 days ago
visibility:
public

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