first commit

Author: Rishaw-Developer

README.md

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+<h1 align="center"> C++ Patterns Code <img style="width: 50px" src="https://user-images.githubusercontent.com/72737691/161961213-56c74c51-8a63-4858-a33a-608f29f2fb24.png" /> </h1>
+<p align="center">
+  Get all the pattern problem question code. Just do <b>git clone</b> and grow.
+</p>
+
+## Contributors
+
+- [Rishaw-Developer](https://github.com/Rishaw-Developer)
+
+## Contributon
+Feel Free to add pattern code in this repo.
+- Only C++ code is accepted
+- Fork the repo
+- Create a branch
+- Make the changes
+- Create a pull request
+- In 1 or 2 days your code will be added
+- **And don't forgot to add your UserName in contributors section**

pattern1.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here row = 5 and col = 4
+* * * *
+* * * *
+* * * *
+* * * *
+* * * *
+*/
+
+int main() {
+    int row, col;
+
+    cin >> row >> col;
+
+    for (int i = 1; i <= row; i++) {
+        for (int j = 1; j <= col; j++) {
+            cout << '*' << ' ';
+        }
+        cout << endl;
+    }
+    return 0;
+}

pattern2.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here row = 5 and col = 4
+* * * * 
+*     * 
+*     * 
+*     * 
+* * * *
+*/
+
+int main()
+{
+    int row, col;
+    cin >> row >> col;
+
+    for (int i = 1; i <= row; i++)
+    {
+        for (int j = 1; j <= col; j++)
+        {
+            if (i == 1 || j == 1 || i == row || j == col)
+            {
+                cout << "* ";
+            }
+            else
+            {
+                cout << "  ";
+            }
+        }
+        cout << endl;
+    }
+
+    return 0;
+}

pattern3.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here n = 5
+*
+* *
+* * *
+* * * *
+* * * * *
+*/
+
+int main() {
+    int n;
+    cin >> n;
+
+    for (int i = 1; i <= n; i++) {
+        for (int j = 1; j <= i; j++) {
+            cout << "* ";
+        }
+        cout << endl;
+    }
+}

pattern4.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here n = 5
+        *
+      * *
+    * * *
+  * * * *
+* * * * *
+*/
+
+int main() {
+    int n;
+    cin >> n;
+    
+    for (int i = 1; i <= n; i++) {
+        for (int j = 1; j <= n-i; j++) {
+            cout << "  ";
+        }
+        for (int j = 1; j <= i; j++) {
+            cout << "* ";
+        }
+        cout << endl;
+    }
+}

pattern5.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here n = 5
+1
+1 2
+1 2 3
+1 2 3 4
+1 2 3 4 5
+*/
+
+int main() {
+    int n;
+    cin >> n;
+    int count;
+    for (int i = 1; i <= n; i++) {
+        for (int j = 1; j <= i; j++) {
+            ++count;
+            cout << count << " ";
+        }
+        count = 0;
+        cout << endl;
+    }
+
+    return 0;
+}

pattern6.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here n = 5
+1
+2 3
+4 5 6
+7 8 9 10
+11 12 13 14
+*/
+
+int main()
+{
+    int n;
+    cin >> n;
+
+    int count = 1;
+    for (int i = 1; i <= n; i++){
+        for (int j = 1; j <= i; j++){
+            cout << count << " ";
+            count++;
+        }
+        cout << endl;
+    }
+}

pattern7.cpp

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+#include <iostream>
+
+using namespace std;
+
+/*
+here n = 4
+*                 * 
+* *             * * 
+* * *         * * * 
+* * * *     * * * * 
+* * * * * * * * * * 
+* * * * * * * * * *
+* * * *     * * * *
+* * *         * * *
+* *             * *
+*                 *
+*/
+
+int main()
+{
+    int n;
+    cin >> n;
+
+    for (int i = 1; i <= n; i++)
+    {
+        for (int j = 1; j <= i; j++)
+        {
+            cout << "*" << " ";
+        }
+        for (int k = 1; k <= (2 * n - 2 * i); k++)
+        {
+            cout << " " << " ";
+        }
+        for (int j = 1; j <= i; j++)
+        {
+            cout << "*" << " ";
+        }
+        cout << endl;
+    }
+    for (int i = n; i >= 1; i--)
+    {
+        for (int j = 1; j <= i; j++)
+        {
+            cout << "*" << " ";
+        }
+        for (int k = 1; k <= (2 * n - 2 * i); k++)
+        {
+            cout << " " << " ";
+        }
+        for (int j = 1; j <= i; j++)
+        {
+            cout << "*" << " ";
+        }
+        cout << endl;
+    }
+
+    return 0;
+}

pattern8.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here n = 5
+1 2 3 4 5 
+1 2 3 4   
+1 2 3     
+1 2       
+1 
+*/
+
+int main() {
+    int n;
+    cin >> n;
+
+    for (int i = 1; i <= n; i++){
+        for (int j = 1; j <= n+1-i; j++) {
+            cout << j << " ";
+        }
+        cout << endl;
+    }
+    
+}

pattern9.cpp

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+#include <iostream>
+using namespace std;
+
+/*
+Here n = 5
+1         
+0 1       
+1 0 1     
+0 1 0 1   
+1 0 1 0 1 
+*/
+
+int main() {
+    int n;
+    cin >> n;
+    for (int i = 1; i <= n; i++) {
+        for (int j = 1; j <= i; j++) {
+            if ((i+j) % 2 == 0 ){
+                cout << 1 << " ";
+            } else {
+                cout << 0 << " ";
+            }
+        }
+        cout << endl;
+    }
+}