diff --git a/Codes/Code-A4 (CRC).cpp b/Codes/Code-A3 (CRC).cpp
similarity index 100%
rename from Codes/Code-A4 (CRC).cpp
rename to Codes/Code-A3 (CRC).cpp
diff --git a/Codes/Code-A4 (Hamming Code).cpp b/Codes/Code-A3 (Hamming Code).cpp
similarity index 100%
rename from Codes/Code-A4 (Hamming Code).cpp
rename to Codes/Code-A3 (Hamming Code).cpp
diff --git a/Codes/Code-A5 (Sliding Window).cpp b/Codes/Code-A4 (Sliding Window).cpp
similarity index 100%
rename from Codes/Code-A5 (Sliding Window).cpp
rename to Codes/Code-A4 (Sliding Window).cpp