labs 1-6: init

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

lab1/1.cpp

@@ -0,0 +1,80 @@
+#include <iostream>
+#include <string.h>
+
+class Person {
+private:
+  static const std::size_t MAX_NAME = 30;
+  static const std::size_t MAX_ADDRESS = 30;
+  char name[MAX_NAME];
+  char address[MAX_ADDRESS];
+  unsigned int age;
+  float salary;
+
+public:
+  void getName();
+  void getAddress();
+  void getAge();
+  void getSalary();
+  void setName(const char[30], size_t);
+  void setAddress(const char[100], size_t);
+  void setAge(unsigned int);
+  void setSalary(float);
+};
+
+inline void Person::getName() {
+  std::cout << name << std::endl;
+}
+
+inline void Person::getAddress() {
+  std::cout << address << std::endl;
+}
+
+inline void Person::getAge() {
+  std::cout << age << std::endl;
+}
+
+inline void Person::getSalary() {
+  std::cout << salary << std::endl;
+}
+
+inline void Person::setName(const char name[], size_t size) {
+  strncpy(this->name, name, (size <= MAX_NAME ? size : MAX_NAME - 1));
+
+  if (size > MAX_NAME)
+    this->name[MAX_NAME - 1] = '\0';
+}
+
+inline void Person::setAddress(const char address[], size_t size) {
+  strncpy(this->address, address, (size <= MAX_ADDRESS ? size : MAX_ADDRESS - 1));
+
+  if (size > MAX_NAME)
+    this->name[MAX_NAME - 1] = '\0';
+}
+
+inline void Person::setAge(unsigned int age) {
+  this->age = age;
+}
+
+inline void Person::setSalary(float salary) {
+  this->salary = salary;
+}
+
+int main() {
+  Person person;
+  const char name[] = "Retard Singh";
+  const char address[] = "420 RetardVille";
+  unsigned int age = 44;
+  float salary = 4.44;
+
+  person.setName(name, sizeof(name));
+  person.setAddress(address, sizeof(address));
+  person.setAge(age);
+  person.setSalary(salary);
+
+  person.getName();
+  person.getAddress();
+  person.getAge();
+  person.getSalary();
+
+  return 0;
+}

lab1/2.cpp

@@ -0,0 +1,28 @@
+#include <cmath>
+#include <iostream>
+
+// Triangle
+double area(double a, double b, double c) {
+  double s = (a + b + c) / 2;
+  return std::sqrt(s * (s - a) * (s - b) * (s - c));
+}
+
+// Rectangle
+double area(double a, double b) { return a * b; }
+
+// Circle
+double area(double a) { return M_PI * a * a; }
+
+int main() {
+
+  double a = 3, b = 4, c = 5;
+
+  std::cout << "Area of a triangle with sides " << a << ", " << b << " and "
+            << c << ": " << area(a, b, c) << std::endl
+            << "Area of rectangle with sides " << a << " and " << b << ": "
+            << area(a, b) << std::endl
+            << "Area of circle with radius " << a << ": " << area(a)
+            << std::endl;
+
+  return 0;
+}

lab1/3.cpp

@@ -0,0 +1,36 @@
+#include <cmath>
+#include <iostream>
+
+double uexponent(double m, unsigned int n) {
+  double ret;
+
+  if (!n)
+    return 1;
+
+  if (n == 1)
+    return m;
+
+  ret = uexponent(m, n / 2);
+  ret *= ret;
+
+  if (n % 2)
+    return ret * m;
+  else
+    return ret;
+}
+
+double exponent(double m, int n = 2) {
+  if (n >= 0)
+    return uexponent(m, n);
+
+  return 1 / uexponent(m, std::abs(n));
+}
+
+int main() {
+
+  double m = 4.1;
+  int n = 4;
+
+  std::cout << m << " raised to " << n << ": " << exponent(m, n) << std::endl
+            << "When n is omitted: " << exponent(m) << std::endl;
+}

lab1/file.org

@@ -0,0 +1,180 @@
+* Write a program to take name, address as a character array, age as int , salary as float and contains inline functions to set the values and display it in class named person.
+
+#+ATTR_LATEX: :options frame=single,breaklines=true
+#+begin_src cpp :tangle 1.cpp :results output :exports both :wrap src text
+#include <iostream>
+#include <string.h>
+
+class Person {
+private:
+  static const std::size_t MAX_NAME = 30;
+  static const std::size_t MAX_ADDRESS = 30;
+  char name[MAX_NAME];
+  char address[MAX_ADDRESS];
+  unsigned int age;
+  float salary;
+
+public:
+  void getName();
+  void getAddress();
+  void getAge();
+  void getSalary();
+  void setName(const char[30], size_t);
+  void setAddress(const char[100], size_t);
+  void setAge(unsigned int);
+  void setSalary(float);
+};
+
+inline void Person::getName() {
+  std::cout << name << std::endl;
+}
+
+inline void Person::getAddress() {
+  std::cout << address << std::endl;
+}
+
+inline void Person::getAge() {
+  std::cout << age << std::endl;
+}
+
+inline void Person::getSalary() {
+  std::cout << salary << std::endl;
+}
+
+inline void Person::setName(const char name[], size_t size) {
+  strncpy(this->name, name, (size <= MAX_NAME ? size : MAX_NAME - 1));
+
+  if (size > MAX_NAME)
+    this->name[MAX_NAME - 1] = '\0';
+}
+
+inline void Person::setAddress(const char address[], size_t size) {
+  strncpy(this->address, address, (size <= MAX_ADDRESS ? size : MAX_ADDRESS - 1));
+
+  if (size > MAX_NAME)
+    this->name[MAX_NAME - 1] = '\0';
+}
+
+inline void Person::setAge(unsigned int age) {
+  this->age = age;
+}
+
+inline void Person::setSalary(float salary) {
+  this->salary = salary;
+}
+
+int main() {
+  Person person;
+  const char name[] = "Retard Singh";
+  const char address[] = "420 RetardVille";
+  unsigned int age = 44;
+  float salary = 4.44;
+
+  person.setName(name, sizeof(name));
+  person.setAddress(address, sizeof(address));
+  person.setAge(age);
+  person.setSalary(salary);
+
+  person.getName();
+  person.getAddress();
+  person.getAge();
+  person.getSalary();
+
+  return 0;
+}
+#+end_src
+
+#+RESULTS:
+#+begin_src text
+Retard Singh
+420 RetardVille
+44
+4.44
+#+end_src
+#+LATEX: \clearpage
+
+* Using the concept of function overloading.Write function for calculating the area of triangle ,circle and rectangle.
+
+#+ATTR_LATEX: :options frame=single,breaklines=true
+#+begin_src cpp :tangle 2.cpp :results output :exports both :wrap src text
+#include <cmath>
+#include <iostream>
+
+// Triangle
+double area(double a, double b, double c) {
+  double s = (a + b + c) / 2;
+  return std::sqrt(s * (s - a) * (s - b) * (s - c));
+}
+
+// Rectangle
+double area(double a, double b) { return a * b; }
+
+// Circle
+double area(double a) { return M_PI * a * a; }
+
+int main() {
+
+  double a = 3, b = 4, c = 5;
+
+  std::cout << "Area of a triangle with sides " << a << ", " << b << " and "
+            << c << ": " << area(a, b, c) << std::endl
+            << "Area of rectangle with sides " << a << " and " << b << ": "
+            << area(a, b) << std::endl
+            << "Area of circle with radius " << a << ": " << area(a)
+            << std::endl;
+
+  return 0;
+}
+#+end_src
+
+#+RESULTS:
+: Area of a triangle with sides 3, 4 and 5: 6
+: Area of rectangle with sides 3 and 4: 12
+: Area of circle with radius 3: 28.2743
+#+LATEX: \clearpage
+
+* Write a program to find number m to power n. The function power takes a double value for m and int value for n. Use default value for n to make the function to calculate squares when this argument is omitted.
+
+#+ATTR_LATEX: :options frame=single,breaklines=true
+#+begin_src cpp :tangle 3.cpp :results output :exports both :wrap src text
+#include <cmath>
+#include <iostream>
+
+double uexponent(double m, unsigned int n) {
+  double ret;
+
+  if (!n)
+    return 1;
+
+  if (n == 1)
+    return m;
+
+  ret = uexponent(m, n / 2);
+  ret *= ret;
+
+  if (n % 2)
+    return ret * m;
+  else
+    return ret;
+}
+
+double exponent(double m, int n = 2) {
+  if (n >= 0)
+    return uexponent(m, n);
+
+  return 1 / uexponent(m, std::abs(n));
+}
+
+int main() {
+
+  double m = 4.1;
+  int n = 4;
+
+  std::cout << m << " raised to " << n << ": " << exponent(m, n) << std::endl
+            << "When n is omitted: " << exponent(m) << std::endl;
+}
+#+end_src
+
+#+RESULTS:
+: 4.1 raised to 4: 282.576
+: When n is omitted: 16.81