{"post":"\n

Here is a list of most asked Pattern programs in C++.

Pattern

  \n    *\n   ***\n  *****\n *******\n*********\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\n\tint n;\n\tcout &lt;&lt; \"Enter number of rows to be printed\\n\"; cin &gt;&gt; n;\n\tfor (int i = 1; i &lt;= n; ++i)\t//for each row\n\t{\n\t\tfor (int j = 0; j &lt; n - i; ++j)\t//for printing spaces\n\t\t\tcout &lt;&lt; \" \";\n\t\tfor (int j = 0; j &lt; 2 *i - 1; ++j)\t//for printing star\n\t\t\tcout &lt;&lt; \"*\";\n\t\tcout &lt;&lt; \"\\n\";\t//going to new line after completing one row\n\t}\n\treturn 0;\n}\n
\n

Pattern

  \n      *\n     * *\n    * * *\n   * * * *\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\n  int n;\n  cout &lt;&lt; \"Enter number of rows to be printed\\n\"; cin &gt;&gt; n;\n  for (int i = 1; i &lt;= n; ++i)\t//for each row\n  {\n    for (int j = 0; j &lt; n - i; ++j)\t//for printing spaces\n      cout &lt;&lt; \" \";\n    for (int j = 1; j &lt;= i; ++j)\t//for printing star and space\n      cout &lt;&lt; \"*\";\n    cout &lt;&lt; \"\\n\";\t//going to new line after completing one row\n\n  }\n  return 0;\n}\n
\n

Pattern

  \n   1\n  121\n 12321\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//for each row\n{\nfor (int j = 0; j < n - i; ++j)\t//for printing spaces\ncout << \" \";\nfor (int j = 1; j <= i; ++j)\t//for increasing series\ncout << j; for (int j = i - 1; j > 0; --j)\ncout << j;\ncout << \"\\n\";\t//going to new line after completing one row
\n}\nreturn 0;\n}\n

Pattern

  \n    * 1 *\n  * 1 2 1 *\n* 1 2 3 2 1 *\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//for each row\n{\ncout << \"\";\t//beginning star\nfor (int j = 1; j <= i; ++j)\t//for increasing series\ncout << j << \" \"; for (int j = i - 1; j > 0; --j)\t//for decreasing series\ncout << j << \" \";\ncout << \"\";\t//ending star\ncout << \"\\n\";\t//going to new line after completing one row
\n}\nreturn 0;\n
\n}
\n

Pattern

  \n1\n2 3\n4 5 6\n7 8 9 10\n

View Code

\n#include\n#include   \t//for setw function\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nint num = 1;\t//maintains the number to be printed\nfor (int i = 1; i <= n; ++i)\t//for row\n{\nfor (int j = 0; j < i; ++j)\t//printing num and incrementing it ‘i’ times\ncout << setw(3) << num++ << \" \";\t//setw is used to prevent disruption due to different number\n//of digits\ncout << \"\\n\";\t//going to next line to print next row\n}
\nreturn 0;\n
\n}\n

Pattern

  \n   A\n  ABC\n ABCDE\nABCDEFG\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//for each row\n{\nfor (int j = 0; j < n - i; ++j)\t//for printing spaces\ncout << \" \";\nfor (int j = 1; j <= 2 *i - 1; ++j)\t//for printing alphabets\ncout << (char)('A' + j - 1);\ncout << \"\\n\";\t//going to new line after completing one row
\n}\nreturn 0;\n
\n}\n

Pattern

  \n   A\n  ABA\n ABCBA\nABCDCBA\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//for each row\n{\nfor (int j = 0; j < n - i; ++j)\t//for printing spaces\ncout << \" \";\nfor (int j = 0; j < i; ++j)\t//for increasing Alphabets\ncout << (char)('A' + j); for (int j = i - 1; j > 0; --j)\t//for decreasing Alphabets\ncout << (char)('A' + j - 1);;\ncout << \"\\n\";\t//going to new line after completing one row
\n}\nreturn 0;\n
\n}\n

Pattern

  \n     A1\n    AB12\n   ABC123\n  ABCD1234\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//for each row\n{\nfor (int j = 0; j < n - i; ++j)\t//for printing spaces\ncout << \" \";\nfor (int j = 1; j <= i; ++j)\t//for printing alphabets\ncout << (char)('A' + j - 1);\nfor (int j = 1; j <= i; ++j)\t//for printing numbers\ncout << j;\ncout << \"\\n\";\t//going to new line after completing one row
\n}\nreturn 0;\n
\n}\n

30+ C Programming Interview Questions

Pattern

  \n*****1*****\n****2*2****\n***3*3*3***\n**4*4*4*4**\n*5*5*5*5*5*\n6*6*6*6*6*6\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//for row\n{\nint num = i;\nfor (int j = 0; j < n - i; ++j)\t//printing preceding stars\ncout << \"\";\nwhile (--num)\t//printing the numbers with stars\ncout << i << \"\";\ncout << i;\t//printing the number last time without star\nfor (int j = 0; j < n - i; ++j)\t//printing following stars\ncout << \"*\";\ncout << \"\\n\";\t//going to next line to print next row\n}
\nreturn 0;\n
\n}\n

Pattern

  \n    *\n   * *\n  *   *\n * * * *\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\n\tint n;\n\tcout &lt;&lt; \"Enter number of rows to be printed\\n\"; cin &gt;&gt; n;\n\tfor (int i = 0; i &lt; n - 1; ++i)\t//for row till second-last\n\t{\n\t\tint j;\n\t\tfor (j = 1; j &lt;= n + i; ++j)\t//moving cursor from first to last place of line\n\t\t{\n\t\t\tif (j == n - i || j == n + i)\t//printing star as required\n\t\t\t\tcout &lt;&lt; \"*\";\n\t\t\telse\t//printing space\n\t\t\t\tcout &lt;&lt; \" \";\n\t\t}\n\t\tcout &lt;&lt; \"\\n\";\t//going to new line after completing one row\n\t}\n\tfor (int j = 0; j &lt; n; ++j)\t//printing last row\n\t\tcout &lt;&lt; \"*\";\n\treturn 0;\n}\n
\n

Pattern

  \n* * * * * * *\n*           *\n*           *\n* * * * * * *\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint l, b;\ncout << \"Enter length and breadth seperated by space\\n\"; cin >> l >> b;\nfor (int i = 0; i < b; ++i)\t//for row\n{\nif (i == 0 || i == b - 1)\t//printing first and last row\n{\nfor (int j = 0; j < l; ++j)\ncout << \"*\";\n}\nelse\n{\nfor (int j = 0; j < 2 * l; ++j)\t//printing other rows\n{\nif (j == 0 || j == 2 l - 2)\t//printing first and last star\ncout << \"\";\nelse\t//printing spaces\ncout << \" \";\n}\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n* * * * *\n    * * * *\n        * * *\n            * *\n                *\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 0; i < n; ++i)\t//for row\n{\nfor (int j = 0; j < 4 * i; ++j)\ncout << \" \";\t//printing beginning spaces\nfor (int j = 0; j < n - i; ++j)\ncout << \"*\";\t//printing stars\ncout << \"\\n\";\t//going to next line to print next row\n}\nreturn 0;\n}\n

Pattern

  \n* * * * *\n* * * *\n* * *\n* *\n*\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 0; i < n; ++i)\t//for row\n{\nfor (int j = 0; j < n - i; ++j)\ncout << \"*\";\t//printing stars\ncout << \"\\n\";\t//going to next line to print next row\n}\nreturn 0;\n}\n

Pattern

  \n        *\n      * *\n    * * *\n  * * * *\n* * * * *\n  * * * *\n    * * *\n      * *\n        * \n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter height of triangle\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//printing upper half of triangle\n{\nfor (int j = 0; j < (2 (n - i)); ++j)\ncout << \" \";\t//printing spaces\nfor (int j = 0; j < i; ++j)\ncout << \"\";\t//printing spaces\ncout << \"\\n\"; //going to next line to print next row } for (int i = n - 1; i > 0; --i)\t//printing lower half\n{\nfor (int j = 0; j < (2 (n - i)); ++j)\ncout << \" \";\t//printing spaces\nfor (int j = 0; j < i; ++j)\ncout << \"\";\t//printing spaces\ncout << \"\\n\";\t//going to next line to print next row\n}\nreturn 0;\n}\n

Pattern

  \n* * * * *  * * * * *\n* * * *      * * * *\n* * *          * * *\n* *              * *\n*                  *\n*                  *\n* *              * *\n* * *          * * *\n* * * *      * * * *\n* * * * *  * * * * *\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter height of one half\\n\"; cin >> n;\nfor (int i = n; i > 0; --i)\t//print upper half\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j <= i)\t//print stars in left half\ncout << \"\";\nelse\t//print space after star in right half\ncout << \" \";\nif (i <= ((2 n) - j))\t//print space after star in left half\ncout << \" \";\nelse\t//print stars in right half\ncout << \"\";\n}\ncout << \"\\n\";\n}\nfor (int i = 1; i <= n; ++i)\t//print lower half\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j <= i)\t//print stars in left half\ncout << \"\";\nelse\t//print space after star in right half\ncout << \" \";\nif (i <= ((2 n) - j))\t//print space after star in left half\ncout << \" \";\nelse\t//print stars in right half\ncout << \"\";\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

30+ C Programming Interview Questions

Pattern

  \n*                  *\n* *              * *\n* * *          * * *\n* * * *      * * * *\n* * * * *  * * * * *\n* * * * *  * * * * *\n* * * *      * * * *\n* * *          * * *\n* *              * *\n*                  *\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter half of height of butterfly\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//print upper half\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j <= i)\t//print stars in left half\ncout << \"\";\nelse\t//print space after star in right half\ncout << \" \";\nif (i <= ((2 n) - j))\t//print space after star in left half\ncout << \" \";\nelse\t//print stars in right half\ncout << \"\";\n}\ncout << \"\\n\"; } for (int i = n; i > 0; --i)\t//print lower half\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j <= i)\t//print stars in left half\ncout << \"\";\nelse\t//print space after star in right half\ncout << \" \";\nif (i <= ((2 n) - j))\t//print space after star in left half\ncout << \" \";\nelse\t//print stars in right half\ncout << \"\";\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n        *\n       * *\n      * * *\n     * * * *\n    * * * * *\n    * * * * *\n     * * * *\n      * * *\n       * *\n        *\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter width of diamond\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//print upper half\n{\nfor (int j = 0; j < n - i; ++j)\t//print spaces\ncout << \" \";\nfor (int j = 0; j < i; ++j)\t//print stars\ncout << \"\";\ncout << \"\\n\"; } for (int i = n - 1; i > 0; --i)\t//print lower half\n{\nfor (int j = 0; j < n - i; ++j)\t//print spaces\ncout << \" \";\nfor (int j = 0; j < i; ++j)\t//print stars\ncout << \"\";\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n         *\n       *   * \n     *       *  \n   *           *  \n  *             *\n   *           *\n     *        *  \n        *   * \n          *\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter width of diamond\\n\"; cin >> n;\nfor (int i = 0; i < n; ++i)\t//print upper half\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j == n - i || j == n + i)\t//print corresponding stars\ncout << \"\";\nelse\t//printing rest spaces\ncout << \" \";\n}\ncout << \"\\n\"; } for (int i = n - 2; i >= 0; --i)\t//print lower half\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j == n - i || j == n + i)\t//print corresponding stars\ncout << \"\";\nelse\t//printing rest spaces\ncout << \" \";\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n3\n44\n555\n6666\n555\n44\n3\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n, num;\ncout << \"Enter number to start with\\n\"; cin >> num;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//print upper half\n{\nfor (int j = 1; j <= i; ++j)\t//print number\n{\ncout << num;\n}\n++num;\t//increasing for next row\ncout << \"\\n\"; } --num; //bringing back the last printed value for (int i = n - 1; i > 0; --i)\t//print lower half\n{\n--num;\t//decreasing the number to print\nfor (int j = 1; j <= i; ++j)\n{\ncout << num;\t//printing the number\n}\ncout << \"\\n\";\n}\nreturn 0;
\n}\n

Pattern

  \n1\n2*3\n4*5*6\n7*8*9*10\n7*8*9*10\n4*5*6\n2*3\n1\n

View Code

\n#include\nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows of one half\\n\"; cin >> n;\nint num = 1;\nfor (int i = 1; i <= n; ++i)\t//print upper half\n{\nfor (int j = 1; j <= 2 i - 1; ++j)\n{\nif (j % 2 != 0)\t//print number at odd places\ncout << num++;\t//increasing for next place\nelse\t//print star at odd places\ncout << \"\";\n}\ncout << \"\\n\"; } --num; //bringing back the last printed value num = num - (n - 1); //setting num to be printed at the beginning number for (int i = n; i > 0; --i)\t//print lower half\n{\nfor (int j = 1; j <= 2 i - 1; ++j)\n{\nif (j % 2 != 0)\t//print number at odd places\ncout << num++;\t//increasing for next place\nelse\t//print star at odd places\ncout << \"\";\n}\ncout << \"\\n\";\nnum = num - (i - 1);\n}\nreturn 0;
\n}\n

Pattern

  \n*\n **\n  ***\n   ****\n    *****\n   ****\n  ***\n **\n*\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter half of number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//upper half\n{\nfor (int j = 1; j < i; ++j)\t//prints spaces\ncout << \" \";\nfor (int j = 1; j <= i; ++j)\t//prints stars\ncout << \"\";\ncout << \"\\n\"; //going to new line after completing one row } for (int i = n - 1; i > 0; --i)\t//lower half\n{\nfor (int j = 1; j < i; ++j)\t//prints spaces\ncout << \" \";\nfor (int j = 1; j <= i; ++j)\t//prints stars\ncout << \"\";\ncout << \"\\n\";\t//going to new line after completing one row\n}\nreturn 0;\n}\n

Pattern

  \n    *\n      *\n        *\n   *******\n        *\n      *\n    *\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nn = n / 2;\nfor (int i = 1; i <= n; ++i)\t//upper half\n{\nfor (int j = 0; j < n - 1 + i; ++j)\t//prints spaces\ncout << \" \";\ncout << \"\";\t//prints star\ncout << \"\\n\";\t//going to new line after completing one row\n}\nfor (int j = 0; j < 2 n + 1; ++j)\t//middle line\ncout << \"\";\ncout << \"\\n\"; for (int i = n; i > 0; --i)\t//lower half\n{\nfor (int j = 0; j < n - 1 + i; ++j)\t//prints spaces\ncout << \" \";\ncout << \"\";\t//prints star\ncout << \"\\n\";\t//going to new line after completing one row\n}\nreturn 0;\n}\n

Pattern

  \n0\n1 0\n0 1 0\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows to be printed\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//row number\n{\nfor (int j = 1; j <= i; ++j)\t//position in each row\n{\nif ((i + j) % 2 == 0)\t//divisibility of sum decides one or two\ncout << \"0 \";\nelse\ncout << \"1 \";\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n  *****\n *****\n*****\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter length of rhombus\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//row number\n{\nfor (int j = 1; j <= n - i; ++j)\t//printing spaces\ncout << \" \";\nfor (int j = 1; j <= n; ++j)\t//printing the side\ncout << \"*\";\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n    ***\n  * *\n***\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter length of rhombus\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\t//row number\n{\nfor (int j = 1; j <= n - i; ++j)\t//printing spaces\ncout << \" \";\nif (i == 1 || i == n)\n{\nfor (int j = 1; j <= n; ++j)\t//printing the upper and lower side\ncout << \"\";\n}\nelse\n{\nfor (int j = 1; j <= n; ++j)\n{\nif (j == 1 || j == n)\t//print first and last star of the side\ncout << \"\";\nelse\ncout << \" \";\n}\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \nN=2;\t\t\n X\t\t\nX X\n X\nN=5;\n    X\n     X\n    O X\n     O X\nX O X O X\n X O\n  X O\n   X\n    X\nN=6;\n    X\n      X\n     O X\n      O X\n     X O X\nX O X X O X\n X O X\n  X O\n   X O\n    X\n     X\n

View Code

\n#include \nusing namespace std;\nvoid px(int n)\t//print alternate X O beginning from X\n{\nfor (int i = 1; i <= n; ++i)\n{\nif (i % 2 != 0)\ncout << \"X \";\nelse\ncout << \"O \";\n}\n}
\nvoid po(int n)\t//print alternate X O beginning from O\n{\nfor (int i = 1; i <= n; ++i)\n{\nif (i % 2 != 0)\ncout << \"O \";\nelse\ncout << \"X \";\n}\n}\nint main()\n{\nint n, m, i, spaces, val;\ncout << \"Enter number of elements in middle row\\n\"; cin >> m;\nif (m % 2 == 0)\t//n-2 lines in case of even\nn = m - 1;\nn = m - 1;\t//just n-1 for odd\nspaces = m - 1;\t//number of spaces\nfor (int i = 1; i <= n / 2; ++i)\t//print 2 rows together\n{\nval = i;\t//number of values in row\nfor (int j = 1; j <= spaces; j++)\ncout << \" \";\nif (i % 2 != 0)\npx(val);\nelse\npo(val);\ncout << \"\\n\";\n//printing second row with one space more\nfor (int j = 1; j <= spaces + 1; j++)\ncout << \" \";\nif (i % 2 != 0)\t//odd row number\npx(val);\nelse\npo(val);\ncout << \"\\n\";\n}\nif (m % 2 == 0)\t//extra mid row for even m\n{\ni = m / 2;\nval = i;\nfor (int j = 1; j <= spaces; j++)\ncout << \" \";\nif (i % 2 != 0)\npx(val);\nelse\npo(val);\ncout << \"\\n\";\n}\n//printing middle row\nif (m % 2 != 0)\npx(m);\nelse\n{\nval = m / 2;\npx(val);\nif (val % 2 == 0)\t//printed half ended on o\npo(val);\nelse\t//printed half ended at x\npx(val);\n}\ncout << \"\\n\";\n//printing lower half\nspaces = 1;\nif (m % 2 == 0)\t//extra mid row for even m\n{\ni = m / 2;\nval = i;\nfor (int j = 1; j <= spaces; j++)\ncout << \" \";\npx(val);\nspaces++;\t//incrementing spaces for next row\ncout << \"\\n\"; } for (int i = n / 2; i > 0; --i)\n{\nval = i;\t//number of values in row\nfor (int j = 1; j <= spaces; j++)\ncout << \" \";\npx(val);\ncout << \"\\n\";\nspaces++;\n//printing second row with one space more\nfor (int j = 1; j <= spaces; j++)\ncout << \" \";\npx(val);\ncout << \"\\n\";\nspaces++;\n}\nreturn 0;\n}\n

Pattern

  \n    * *\n    * *\n  * * * *\n  * * * *\n* * * * * *\n* * * * * *\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of steps\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\n{\nint spaces = 2 (n - i);\nint ctr = 0;\nwhile (ctr < 2)\t//print same row twice\n{\nfor (int j = 1; j <= spaces; ++j)\ncout << \" \";\nfor (int j = 1; j <= 2 * i; ++j)\ncout << \"\";\nctr++;\ncout << \"\\n\";\n}\n}\nreturn 0;\n}\n

Pattern

  \n       1\n    2 1 1 2\n 3 2 1   1 2 3\n    2 1 1 2\n       1\n

View Code

\n#include\nusing namespace std;
\nint main()\n{\nint n;\ncout << \"Enter number of rows\\n\"; cin >> n;\nint r = n / 2 + 1;\nfor (int i = 1; i <= r; ++i)\t//upper half\n{\nfor (int j = 1; j <= 3 *(r - i); j++)\t//beginning spaces\n{\ncout << \" \"; } for (int j = i; j > 0; --j)\t//printing decreasing numbers\ncout << j << \" \"; for (int j = 2 *(i - 2); j > 0; --j)\ncout << \" \";\nfor (int j = 1; j <= i && i > 1; ++j)\t//printing increasing numbers\ncout << j << \" \";\ncout << \"\\n\"; } for (int i = r - 1; i > 0; --i)\t//lower half\n{\nfor (int j = 1; j <= 3 *(r - i); j++)\t//beginning spaces\n{\ncout << \" \"; } for (int j = i; j > 0; --j)\t//printing decreasing numbers\ncout << j << \" \"; for (int j = 2 *(i - 2); j > 0; --j)\ncout << \" \";\nfor (int j = 1; j <= i && i > 1; ++j)\t//printing increasing numbers\ncout << j << \" \";\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n*      * * * *\n*      *\n*      *\n*  *  *  *  *\n      *     *\n      *     *\n* * * *     *\n

View Code

\n#include \nusing namespace std;\n//all spaces in this program are two spaces\nint main()\n{\n\tint n;\n\tcout << \"Enter number of rows\\n\"; cin >> n;\n\tfor (int j = 1; j < 2 * n; ++j) //printing first line { if (j == 1 || j >= n)\n\t\t\tcout << \"*\";\n\t\telse\n\t\t\tcout << \"  \";\n\t}\n\tcout << \"\\n\";\n\tfor (int i = 1; i <= n - 2; ++i)\t//printing the upper half\n\t{\n\t\tfor (int j = 1; j <= n; ++j)\n\t\t{\n\t\t\tif (j == 1 || j == n)\n\t\t\t\tcout << \"*\";\n\t\t\telse\n\t\t\t\tcout << \"  \";\n\t\t}\n\t\tcout << \"\\n\";\n\t}\n\tfor (int j = 1; j < 2 * n; ++j)\t//printing middle row\n\t\tcout << \"*\";\n\tcout << \"\\n\";\n\tfor (int i = 1; i <= n - 2; ++i)\t//printing the lower half\n\t{\n\t\tfor (int j = 1; j < 2 * n; ++j)\n\t\t{\n\t\t\tif (j == n || j == 2 *n - 1)\n\t\t\t\tcout << \"*\";\n\t\t\telse\n\t\t\t\tcout << \"  \";\n\t\t}\n\t\tcout << \"\\n\";\n\t}\n\tfor (int j = 1; j < 2 * n; ++j)\t//last row\n\t{\n\t\tif (j <= n || j == 2 *n - 1)\n\t\t\tcout << \"*\";\n\t\telse\n\t\t\tcout << \"  \";\n\t}\nreturn 0;\n
\n}\n

Pattern

  \n1        1\n12      21\n123    321\n1234  4321\n1234554321\n

View Code

\n#include \nusing namespace std;\nint main()\n{\nint n;\ncout << \"Enter number of rows\\n\"; cin >> n;\nfor (int i = 1; i <= n; ++i)\n{\nfor (int j = 1; j <= 2 * n; ++j)\n{\nif (j <= i)\ncout << j; else if (i > (2 *n - j))\ncout << 2 *n - j + 1;\nelse\ncout << \" \";\n}\ncout << \"\\n\";\n}\nreturn 0;\n}\n

Pattern

  \n           1\n        1   1\n      1   2   1\n    1   3   3   1\n  1   4   6   4   1\n

View Code

\n#include \n#include   \t//to use setw function\nusing namespace std;\nint fact(int n)\n{\nif (n <= 1)\t//factorial of zero and 1\nreturn 1;\nelse\nreturn (n* fact(n - 1));\n}
\nint nCr(int n, int r)\n{\nreturn (fact(n) / (fact(n - r) *fact(r)));\n}
\nint main()\n{\nint n;\ncout << \"Enter number of rows\\n\"; cin >> n;\nfor (int i = 0; i < n; ++i) { int spaces = (n - i - 1); while (spaces > 0)\t//printing spaces\n{\ncout << setw(2) << \" \";\n--spaces;\n}\nfor (int j = 0; j <= i; ++j)\t//printing terms\ncout << setw(3) << nCr(i, j) << \" \";\ncout << \"\\n\";\n}\nreturn 0;\n}\n

\n","title":"Pattern Programs in C","authorDetails":{"name":"Garvit Gulati","slug":"garvit-gulati"},"seo":{"title":"Most asked Pattern Programs in C"},"description":"Learn the most popular and frequently asked C++ pattern programs including pyramid, number, star, and alphabet patterns. This article provides detailed explanations and code examples for each pattern.","slug":"cpp/examples/pattern-programs-in-cpp/","articleId":"636a83447bb1ce5072622b69","bookmarkStatus":{"isBookmarked":false,"bookmarkId":null}}