diff --git a/C++/Program 22/adding_two_string.cpp b/C++/Program 22/adding_two_string.cpp
new file mode 100644
index 00000000..68c0b973
--- /dev/null
+++ b/C++/Program 22/adding_two_string.cpp	
@@ -0,0 +1,59 @@
+/*
+Program : To add 2 string
+
+this Program is Contributed by Abhishek Jaiswal
+*/
+
+#include <iostream> 
+using namespace std; 
+
+int Len(string &str1, string &str2) 
+{ 
+    int len1 = str1.size(); 
+    int len2 = str2.size(); 
+    if (len1 < len2) 
+    { 
+        for (int i = 0 ; i < len2 - len1 ; i++) 
+            str1 = '0' + str1; 
+        return len2; 
+    } 
+    else if (len1 > len2) 
+    { 
+        for (int i = 0 ; i < len1 - len2 ; i++) 
+            str2 = '0' + str2; 
+    } 
+    return len1; 
+}
+
+string add( string a, string b ) 
+{ 
+    string result; 
+    int len = Len(a, b); 
+  
+    int carry = 0;
+    for (int i = len-1 ; i >= 0 ; i--) 
+    { 
+        int aBit = a.at(i) - '0'; 
+        int bBit = b.at(i) - '0'; 
+        int sum = (aBit ^ bBit ^ carry)+'0'; 
+  
+        result = (char)sum + result; 
+        carry = (aBit & bBit) | (bBit & carry) | (aBit & carry); 
+    } 
+
+    if (carry) 
+        result = '1' + result; 
+  
+    return result; 
+} 
+
+int main() 
+{ 
+    string str1,str2;
+    cout<<"Enter the string 1 :";
+    cin>>str1;
+    cout<<"Enter the string 2 :";
+    cin>>str2;
+    cout << "Sum is " << add(str1, str2); 
+    return 0; 
+} 
diff --git a/C++/Program 22/readme.md b/C++/Program 22/readme.md
new file mode 100644
index 00000000..1144c04b
--- /dev/null
+++ b/C++/Program 22/readme.md	
@@ -0,0 +1,3 @@
+Program : To add Two Binary Number 
+Input : Two Number consitising of 0 and 1
+Output : Number Constisting of 0 and 1
diff --git a/C++/Program 23/readme.md b/C++/Program 23/readme.md
new file mode 100644
index 00000000..33afe4b7
--- /dev/null
+++ b/C++/Program 23/readme.md	
@@ -0,0 +1,4 @@
+Program :To find the sum of square of binomial coefficient
+Input : Integer
+Output : Integer
+
diff --git a/C++/Program 23/sum_of_square_of_binomial_coefficient.cpp b/C++/Program 23/sum_of_square_of_binomial_coefficient.cpp
new file mode 100644
index 00000000..032034db
--- /dev/null
+++ b/C++/Program 23/sum_of_square_of_binomial_coefficient.cpp	
@@ -0,0 +1,32 @@
+/*
+Program :To find the sum of square of  
+binomial coefficient. 
+
+This Program is contributed by Abhishek Jaiswal
+*/
+#include <bits/stdc++.h>
+using namespace std;
+
+int factorial(int begin, int end)
+{
+    int num = 1;
+    for (int i = begin; i <= end; i++)
+        num *= i;
+
+    return num;
+}
+
+int square(int n)
+{
+    return factorial(n + 1, 2 * n) / factorial(1, n);
+}
+
+int main()
+{
+    int n;
+    cout << "Enter the number :";
+    cin >> n;
+    cout << "The Sum of Square is " << square(n) << endl;
+    return 0;
+}
+