creation d02 ex02

d02/ex02/Fixed.cpp

@@ -0,0 +1,132 @@
+#include "Fixed.hpp"
+
+/*
+ * functions to print numbers in binary
+ * for the float, found help from stackoverflow :
+ * https://stackoverflow.com/questions/474007/floating-point-to-binary-valuec
+ */
+
+std::string printBitsInt(int num)
+{
+	int i = 0;
+
+	for (unsigned int mask = 1U << (sizeof(int) *8 -1); mask; mask >>= 1)
+	{
+		std::cout << ((num & mask) != 0);
+		i++;
+		if (i == 1 || i == 9 || i == 24)
+			std::cout << ' ';
+	}
+	return "";
+}
+
+std::string	printBitsFloat(float num)
+{
+	int	*p = (int *)&num;
+	int i = 0;
+
+	for (unsigned int mask = 1U << (sizeof(float) *8 -1); mask; mask >>= 1)
+	{
+		std::cout << ((*p & mask) != 0);
+		i++;
+		if (i == 1 || i == 9 || i == 24)
+			std::cout << ' ';
+	}
+	return "";
+}
+
+/*
+ * statics variables initialisation
+ *
+ * for MAX integer :
+ * 00000000 01111111 11111111 11111111 ( 8388607) (-1U >> (this->_frac +1))
+ *              <= ... >=
+ * 11111111 10000000 00000000 00000000 (-8388608)
+ *
+ */
+
+int const Fixed::_frac = 8;
+int const Fixed::_max = -1U >> (_frac +1);
+
+/*
+ * default constructor / copy constructor / destructor
+ */
+
+Fixed::Fixed() : _value(0) {
+	std::cout << "Default constructor called" << '\n';
+	return;
+}
+
+Fixed::Fixed(Fixed const & src) {
+	std::cout << "Copy constructor called" << '\n';
+	*this = src;
+	return;
+}
+
+Fixed::~Fixed( void ) {
+	std::cout << "Destructor called" << '\n';
+	return;
+}
+
+/*
+ * int and float constructors
+ */
+
+Fixed::Fixed(int integer) {
+	std::cout << "Int constructor called" << '\n';
+
+	if (integer < ~this->_max || integer > this->_max)
+		std::cout << "error: integer out of range" << '\n';
+	else
+		this->_value = integer << this->_frac;
+}
+
+Fixed::Fixed(float const floater) {
+	std::cout << "Float constructor called" << '\n';
+
+	if (floater < ~this->_max || floater > this->_max)
+		std::cout << "error: float out of range" << '\n';
+	else
+		this->_value = floater * (1 << this->_frac);
+}
+
+/*
+ * assignement operator
+ */
+
+Fixed &	Fixed::operator=( Fixed const & rhs ) {
+	std::cout << "Copy assignment operator called" << '\n';
+	if ( this != &rhs )
+		this->_value = rhs.getRawBits();
+	return *this;
+}
+
+/*
+ * functions that returns _value
+ */
+
+int		Fixed::getRawBits( void ) const {
+	return this->_value;
+}
+
+void	Fixed::setRawBits( int const raw ) {
+	this->_value = raw;
+}
+
+int		Fixed::toInt( void ) const {
+	return (this->_value >> this->_frac);
+}
+float	Fixed::toFloat( void ) const {
+	return ((float)this->_value / (float)(1 << this->_frac));
+}
+
+/*
+ * overload "<<" -> output fixed point in float representation
+ * took here : https://github.com/pgomez-a/42_CPP_Piscine/blob/master/cpp02/ex01/Fixed.cpp
+ */
+
+std::ostream &	operator<<(std::ostream & out, Fixed const & fixed)
+{
+	out << fixed.toFloat();
+	return (out);
+}

d02/ex02/Fixed.hpp

@@ -0,0 +1,35 @@
+#ifndef FIXED_HPP
+# define FIXED_HPP
+
+#include <iostream>
+#include <string>
+#include <cmath>
+
+class Fixed {
+
+public:
+
+	 Fixed(void);							// default/parametric constructor
+	 Fixed(Fixed const & src);				// copy constructor
+	~Fixed(void);							// destructor
+	 Fixed(int integer);
+	 Fixed(float const floater);
+
+	Fixed &	operator=(Fixed const & rhs);	// assignement operator
+
+	int		getRawBits(void) const;
+	void	setRawBits(int const raw);
+	float	toFloat(void) const;
+	int		toInt(void) const;
+
+private:
+
+	int					_value;
+	static int const	_frac;
+	static int const	_max;
+
+};
+
+std::ostream &	operator<<(std::ostream & out, Fixed const & fixed);
+
+#endif

d02/ex02/Makefile

@@ -0,0 +1,62 @@
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+#                 .     name = value      .  name is case sensitive   #
+#    VARIABLES    . or  name = value \    .  use VPATH only for .c    #
+#                 .            value      .                  or .cpp  #
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+
+NAME      = fixed
+
+CC        = clang++
+CFLAGS    = -Wall -Wextra -Werror $(INCLUDES) -std=c++98
+
+VPATH     = $(D_SRCS)
+
+LIBS      =
+
+INCLUDES  = -I$(D_HEADERS)
+
+D_SRCS    = .
+SRCS      = main.cpp \
+			Fixed.cpp
+
+D_HEADERS = .
+HEADERS   = Fixed.hpp
+
+D_OBJS    = builds
+OBJS      = $(SRCS:%.cpp=$(D_OBJS)/%.o)
+
+RM_D_OBJS = rm -rf $(D_OBJS)
+ifeq "$(D_OBJS)" "."
+RM_D_OBJS = 
+endif
+
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+#             .   target: prerequisites   .   $@ : target             #
+#    RULES    .           recipe          .   $< : 1st prerequisite   #
+#             .           recipe          .   $^ : all prerequisites  #
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - #
+
+all: $(NAME)
+
+$(D_OBJS)/%.o: %.cpp | $(D_OBJS)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(D_OBJS):
+	mkdir $@
+
+$(OBJS): $(HEADERS:%=$(D_HEADERS)/%)
+
+$(NAME): $(OBJS)
+	$(CC) $(OBJS) -o $@ $(LIBS)
+
+clean:
+	rm -f $(OBJS)
+
+fclean: clean
+	rm -f $(NAME)
+	$(RM_D_OBJS)
+
+re: fclean all
+
+.PHONY : all clean fclean re bonus run valgrind

d02/ex02/main.cpp

@@ -0,0 +1,24 @@
+#include "Fixed.hpp"
+#include <iostream>
+
+int main( void ) {
+
+	Fixed a;
+	Fixed const b( 10 );
+	Fixed const c( 42.42f );
+	Fixed const d( b );
+
+	a = Fixed( 1234.4321f );
+
+	std::cout << "a is " << a << std::endl;
+	std::cout << "b is " << b << std::endl;
+	std::cout << "c is " << c << std::endl;
+	std::cout << "d is " << d << std::endl;
+
+	std::cout << "a is " << a.toInt() << " as integer" << std::endl;
+	std::cout << "b is " << b.toInt() << " as integer" << std::endl;
+	std::cout << "c is " << c.toInt() << " as integer" << std::endl;
+	std::cout << "d is " << d.toInt() << " as integer" << std::endl;
+
+	return 0;
+}