diff --git a/Codes/Code-B5.cpp b/Codes/Code-B5.cpp
new file mode 100644
index 0000000..afc38cd
--- /dev/null
+++ b/Codes/Code-B5.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+using namespace std;
+
+void printSubnetMask(int prefixLength) {
+  int mask[4] = {0, 0, 0, 0};
+  for (int i = 0; i < prefixLength; ++i) {
+    mask[i / 8] |= (1 << (7 - (i % 8)));
+  }
+  cout << "Subnet Mask for /" << prefixLength << ": ";
+  cout << mask[0] << "." << mask[1] << "." << mask[2] << "." << mask[3] << std::endl;
+}
+
+int main() {
+  int prefixLength;
+  cout << "Enter the prefix length: ";
+  cin >> prefixLength;
+
+  if (prefixLength >= 0 && prefixLength <= 32) {
+    printSubnetMask(prefixLength);
+  }
+  else {
+    cout << "Invalid prefix length!" << std::endl;
+  }
+  return 0;
+}
+
+/*
+OUTPUT:
+Enter the prefix length: 22
+Subnet Mask for /22: 255.255.252.0
+Enter the prefix length: 0
+Subnet Mask for /0: 0.0.0.0
+Enter the prefix length: 32
+Subnet Mask for /32: 255.255.255.255
+*/
diff --git a/Printable outputs/Output-B5.pdf b/Printable outputs/Output-B5.pdf
new file mode 100644
index 0000000..3c8c47a
Binary files /dev/null and b/Printable outputs/Output-B5.pdf differ
diff --git a/README.md b/README.md
index 7a4f9aa..85860a2 100644
--- a/README.md
+++ b/README.md
@@ -46,8 +46,10 @@ This Git repository is a comprehensive resource for the Computer Networks and Se
 - [Output-A4](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-A4.pdf)
 
 ##### B5 - Subnetting and subnet mask
+- [Code-B5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B5.cpp)
 - [Handout-B5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Handouts/Handout-B5.pdf)
 - [Write-up - B5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Write-ups/Write-up%20-%20B5.pdf)
+- [Output-B5](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Printable%20outputs/Output-B5.pdf)
 
 ##### B6 - Link state & distance vector
 - [Code-B6](https://git.kska.io/sppu-te-comp-content/ComputerNetworksAndSecurity/src/branch/main/Codes/Code-B6.py)