In C Code, using the included halfAdder and fullAdder, create a fourBitAdder

typedef char bit;

typedef struct

{

int sum;

bit carryOut;

} adderReturn

adderReturn halfAdder(bit x, bit y)

{

adderReturn output;

output.sum = x^y; //Exclusive or

output.carryOut = x&y; //And

return output;

}

adderReturn fullAdder(bit x, bit y, bit carryIn)

{

adderReturn output1 = halfAdder(x, y);

adderReturn output2 = halfAdder(output1.sum, carryIn);

adderReturn output;

output.carryOut = output1.carryOut | output2.carryOut;

output.sum = output2.sum;

return output;

}

adderReturn fourBitAdder(int a, int b, bit carryIn)

{

//Code Here

}