4-bit Ripple Carry Adder

Problem Description

Implement a 4-bit ripple carry adder that adds two 4-bit numbers along with a carry-in bit.

Module Interface

• Inputs:
  • A: 4-bit operand A
  • B: 4-bit operand B
  • cin: 1-bit carry input
• Outputs:
  • sum: 4-bit sum output
  • cout: 1-bit carry output

Expected Behavior

• Performs binary addition: sum = A + B + cin
• cout is the carry out from the most significant bit