C++ program to implement Full Adder
Prerequisite : Full Adder
We are given three inputs of Full Adder A, B,C-IN. The task is to implement the Full Adder circuit and Print output i.e. sum and C-Out of three inputs.
A Full Adder is a combinational circuit that performs an addition operation on three 1-bit binary numbers. The Full Adder has three input states and two output states. The two outputs are Sum and Carry.
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Here we have three inputs A, B, Cin and two outputs Sum, Cout. And the truth table for Full Adder is
Logical Expression :
SUM = C-IN XOR ( A XOR B )
C-0UT= A B + B C-IN + A C-IN
- Input : A=1, B=0,C-In=0
Output : Sum=1, C-Out=0
Here from logical expression Sum= C-IN XOR (A XOR B ) i.e. 0 XOR (1 XOR 0) =1 , C-Out= A B + B C-IN + A C-IN i.e., 1 AND 0 + 0 AND 0 + 1 AND 0 = 0 .
- Input : A=1, B=1,C-In=0
Output: Sum=0, C-Out=1
- Initialize the variables Sum and C_Out for storing outputs.
- First we will take three inputs A ,B and C_In.
- By applying C-IN XOR (A XOR B ) we get the value of Sum.
- By applying A B + B C-IN + A C-IN we get the value of C_Out.
Sum = 1 C-Out = 0