logical operation functions in c; And, Or, Xor, Not etc..

How would I set up gateAnd(), gateOr()...etc...

I have never tried to replicate these operations with a program, and also first time using c, only have used Java previously..

I also will have to setup halfAdder, and fullAdder.

Here is the code:

Code:

#include "stdlib.h"
#include "assert.h"
#include "stdio.h"
#include "circuit.h"

int main(int argc, char * argv[])
{		
	struct gate * g = gateInput("Type an Integer");
	gatePrint(g);		
	return 0;
}

	struct gate * gateInput(char * prompt) 
	{		
		int i;
		printf(prompt);
		scanf("%d", &i);
		return gateConstant(i);
	}

	struct gate * gateConstant (int value)
	{
		struct gate * r = (struct gate *) malloc(sizeof(struct gate));
		assert(r != 0);

		if (value == 0)
		return gateZero();

		if (value == 1)
		return gateOne();
	}

	struct gate * gateZero()
	{
		struct gate * r = (struct gate *) malloc(sizeof(struct gate));
		assert(r != 0);
		r -> gateType = ConstantZeroGate;
		return r;
	}

	struct gate * gateOne()
	{
		struct gate * r = (struct gate *) malloc(sizeof(struct gate));
		assert(r != 0);
		r -> gateType = ConstantOneGate;
		return r;
	}

	void gatePrint (struct gate * e)
	{
		printf("The entered Value: %d \n",*e);
	}

	int gateEval (struct gate * e)
	{
		
	}

	void intToBit (int value, int * eights, int * fours, int * twos, int * ones)
	{
		assert ((value >= 0) && (value < 16));
		*ones = value % 2;		
	}

	struct gate * gateNot(struct gate * arg)
	{
	

	}
	
	struct gate * gateAnd(struct gate * left, struct gate * right)
	{

	}

	struct gate * gateOr(struct gate * left, struct gate * right)
	{

	}

	struct gate * gateXor(struct gate * left, struct gate right)
	{

	}

	void halfAdder(struct gate * left, struct gate * right, struct * carryin, struct gate **sum)
	{

	}

FAQ > Explanations of... > Bit shifting and bitwise operations
FAQ > Prelude's Corner > Bit manipulation
Of use?

Logical operators &&, ||, ! are similar (but different).

Hi,
In C u can achive this by using '&&' for AND, '||' for OR, '!' for NOT, '^' for XOR, '&' bitwise AND,'|' Bitwise OR . Better refer to some "using Logical operators and bitwise operators in C". Through manipulating them you can setup Half adder and Full adder.

Thank you for the link, it's a good reference

Thank you "maven" for the info, I was using bitwise for OR , AND and need them for integers..

what do you think about the intToBit function?

What do you think about this code? will these functions operate properly?

Code:

void intToBit (int value, int * eights, int * fours, int * twos, int * ones)
	{
		assert ((value >= 0) && (value < 16));
		*ones = value % 2;
		*twos = (int)(value/2) % 2;
		*fours = (int)((value/2)/2) %2	
		*eights = (int)(((value/2)/2)/2) %2	
	}

	struct gate * gateNot(struct gate * arg)
	{
		struct gate * r = !arg;
		return r;
	}
	
	struct gate * gateAnd(struct gate * left, struct gate * right)
	{
		struct gate * r = left && right;
		return r;
	}

	struct gate * gateOr(struct gate * left, struct gate * right)
	{
		struct gate * r = left || right;
		return r;
	}

	struct gate * gateXor(struct gate * left, struct gate right)
	{
		struct gate * r = left ^ right;
		return r;
	}

Read the difference between in " Logical AND '&&', Logical OR '||' " and "Bitwise AND '&', Bitwise OR '|' " respectively. Then Use them according to your need.

Anyone with a solution?

Here is my Errors:

Code:

assignment1.c: In function `gateNot':
assignment1.c:74: warning: initialization makes pointer from integer without a cast
assignment1.c: In function `gateAnd':
assignment1.c:80: warning: initialization makes pointer from integer without a cast
assignment1.c: In function `gateOr':
assignment1.c:86: warning: initialization makes pointer from integer without a cast
assignment1.c: In function `gateXor':
assignment1.c:92: error: invalid operands to binary ^
assignment1.c: At top level:
assignment1.c:96: error: syntax error before '*' token

And here is the code

Code:

struct gate * gateNot(struct gate * arg)
	{
		struct gate * r = !arg;
		return r;
	}
	
	struct gate * gateAnd(struct gate * left, struct gate * right)
	{
		struct gate * r = (left && right);
		return r;
	}

	struct gate * gateOr(struct gate * left, struct gate * right)
	{
		struct gate * r = (left || right);
		return r;
	}

	struct gate * gateXor(struct gate * left, struct gate * right)
	{
		struct gate * r = (left ^ right);
		return r;
	}

Hi,

Here Its a limitation of C, that you can not make basic operations through predefined operators on User defined variables. As structure leads to a userdefined variable. extract out predefined datatypes from structure and then apply these basic operations on them.