feat(ex01): it works

ex01/.gitignore

@@ -0,0 +1 @@
+ex01

ex01/Fixed.cpp

@@ -0,0 +1,70 @@
+#include "Fixed.hpp"
+#include <bitset>
+#include <sstream>
+
+const int Fixed::fracbits(8);
+
+Fixed::Fixed() {
+  std::cout << "Default constructor called" << std::endl;
+  value = 0;
+}
+
+Fixed::Fixed(const int val) {
+  std::cout << "Int constructor called with " << val << std::endl;
+  value = val << fracbits;
+}
+
+Fixed::Fixed(const float val) {
+  std::cout << "Float constructor called with " << val << std::endl;
+  const static int factor = 1 << fracbits;
+  float temp = (val * factor);
+  if (temp >= 0)
+    temp += 0.5f;
+  else
+    temp -= 0.5f;
+  value = (int)(temp);
+}
+
+Fixed::Fixed(const Fixed &other) {
+  std::cout << "Copy constructor called" << std::endl;
+  this->value = other.value;
+}
+
+Fixed &Fixed::operator=(const Fixed &other) {
+  std::cout << "Copy assignment operator called" << std::endl;
+  this->setRawBits(other.getRawBits());
+  return *this;
+}
+
+Fixed::~Fixed() { std::cout << "Destructor called" << std::endl; }
+
+int Fixed::getRawBits(void) const {
+  std::cout << "getRawBits member function called" << std::endl;
+  return value;
+}
+
+void Fixed::setRawBits(int const raw) { value = raw; }
+
+float Fixed::toFloat(void) const {
+  const static int factor = 1 << fracbits;
+  float result = (float)value / factor;
+  return (result);
+}
+
+int Fixed::toInt(void) const {
+  int result = (value >> fracbits);
+  return (result);
+}
+
+std::string Fixed::toBin(void) const {
+  std::stringstream result;
+  result << std::bitset<32 - fracbits>(value >> fracbits);
+  result << ".";
+  result << std::bitset<fracbits>(value & (1 << fracbits) - 1);
+  return result.str();
+}
+
+std::ostream &operator<<(std::ostream &stream, const Fixed &fixed) {
+  stream << fixed.toFloat();
+  return stream;
+}

ex01/Fixed.hpp

@@ -0,0 +1,30 @@
+#ifndef FIXED_HPP
+#define FIXED_HPP
+
+#include <iostream>
+
+class Fixed {
+public:
+  Fixed();
+  Fixed(const int val);
+  Fixed(const float val);
+  Fixed(const Fixed &other);
+  Fixed &operator=(const Fixed &other);
+  ~Fixed();
+
+  int getRawBits(void) const;
+  void setRawBits(int const raw);
+
+  float toFloat(void) const;
+  int toInt(void) const;
+
+  std::string toBin(void) const;
+
+  friend std::ostream &operator<<(std::ostream &stream, const Fixed &fixed);
+
+private:
+  int value;
+  static const int fracbits;
+};
+
+#endif

ex01/Makefile

@@ -0,0 +1,39 @@
+NAME = ex01
+ifeq ($(CPPFLAGS),)
+	CPPFLAGS = -Wall -Wextra -Werror -std=c++98 -g
+endif
+ifeq ($(CXX),)
+	CXX = c++
+endif
+# g++ is the default on 42 computers
+ifeq ($(CXX),g++)
+	CXX = c++
+endif
+srcs = \
+	Fixed.cpp \
+
+main_objs = main.o $(srcs:.cpp=.o)
+all_objs = $(main_objs)
+deps = $(all_objs:.o=.d)
+
+all: $(NAME)
+
+-include $(deps)
+
+$(NAME): $(main_objs)
+	$(CXX) $(CPPFLAGS) -o $@ $^
+
+%.o: %.cpp
+	$(CXX) -c $(CPPFLAGS) -o $*.o $*.cpp
+	$(CXX) -MM $(CPPFLAGS) -MT $*.o $*.cpp > $*.d
+
+clean:
+	find . -name '*.o' -print -delete
+	find . -name '*.d' -print -delete
+
+fclean: clean
+	rm -f $(NAME)
+
+re:
+	+make fclean
+	+make all

ex01/main.cpp

@@ -0,0 +1,23 @@
+#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;
+  std::cout << "a is " << a.toBin() << " as binary" << std::endl;
+  std::cout << "b is " << b.toBin() << " as binary" << std::endl;
+  std::cout << "c is " << c.toBin() << " as binary" << std::endl;
+  std::cout << "d is " << d.toBin() << " as binary" << std::endl;
+  return 0;
+}