labs 1-6: init

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

lab2/4.cpp

@@ -0,0 +1,96 @@
+#include <iostream>
+#include <vector>
+using namespace std;
+
+class Matrix {
+private:
+  unsigned int r, c;
+  vector<vector<int>> matrix;
+
+public:
+  Matrix() = default;
+  Matrix(int, int);
+  void init(vector<vector<int>>);
+  unsigned int getRows();
+  unsigned int getColumns();
+  Matrix operator*(Matrix);
+  void display();
+};
+
+Matrix::Matrix(int r, int c) {
+  this->r = r, this->c = c;
+  this->matrix = vector<vector<int>>(r, vector<int>(c));
+}
+
+void Matrix::init(vector<vector<int>> src) {
+  unsigned int i, j;
+
+  if (this->r > src.size())
+    exit(1);
+
+  for (i = 0; i < this->r; i++) {
+    if (c > src[i].size())
+      exit(1);
+
+    for (int j = 0; j < this->c; j++)
+      this->matrix[i][j] = src[i][j];
+  }
+}
+
+inline unsigned int Matrix::getRows() { return r; }
+
+inline unsigned int Matrix::getColumns() { return c; }
+
+Matrix Matrix::operator*(Matrix operand) {
+  unsigned int i, j, k;
+  unsigned int r, c;
+  unsigned int common;
+  Matrix m;
+
+  if (this->getColumns() != operand.getRows())
+    exit(1);
+
+  r = this->getRows();
+  c = operand.getColumns();
+
+  m = Matrix(r, c);
+
+  common = this->getColumns();
+
+  for (i = 0; i < r; i++) {
+    for (j = 0; j < c; j++) {
+      int s = 0;
+      for (k = 0; k < common; k++)
+        s += this->matrix[i][k] * operand.matrix[k][j];
+      m.matrix[i][j] = s;
+    }
+  }
+
+  return m;
+}
+
+void Matrix::display() {
+  unsigned int i, j;
+
+  for (i = 0; i < this->r; i++) {
+    for (j = 0; j < this->c; j++)
+      cout << this->matrix[i][j] << ' ';
+    cout << endl;
+  }
+}
+
+int main() {
+  Matrix a(2, 3), b(3, 4);
+  Matrix m;
+
+  a.init(vector<vector<int>>{{1, 2, -3}, {3, 2, 1}});
+
+  b.init(
+      vector<vector<int>>{{1, -4, -4, 1}, {0, 4, 4, -34}, {3, 1231, 0, -9653}});
+
+  m = a * b;
+
+  m.display();
+
+  return 0;
+}

lab2/5.cpp

@@ -0,0 +1,56 @@
+#include <iostream>
+using namespace std;
+
+class Time {
+private:
+  uint h, m, s;
+
+public:
+  Time() = default;
+  Time(uint, uint, uint);
+  Time operator+(Time);
+  void display();
+};
+
+Time::Time(uint h, uint m, uint s) {
+  if (m > 59 || s > 59)
+    exit(1);
+
+  this->h = h;
+  this->m = m;
+  this->s = s;
+}
+
+void Time::display() {
+  cout << "Hours: " << this->h << endl
+       << "Minutes: " << this->m << endl
+       << "Seconds: " << this->s << endl;
+}
+
+Time Time::operator+(Time op) {
+  Time t;
+
+  t.h = this->h + op.h;
+  t.m = this->m + op.m;
+  t.s = this->s + op.s;
+
+  t.m += t.s / 60;
+  t.s %= 60;
+
+  t.h += t.m / 60;
+  t.m %= 60;
+
+  return t;
+}
+
+int main() {
+  Time t;
+  Time a(64, 32, 7);
+  Time b(3, 59, 53);
+
+  t = a + b;
+
+  t.display();
+
+  return 0;
+}

lab2/6.cpp

@@ -0,0 +1,72 @@
+#include <iostream>
+
+using namespace std;
+
+const uint NSUBS = 5;
+const uint NSTUDENTS = 5;
+
+class Student {
+private:
+  char name[30];
+  char branch[20];
+  uint enrollment;
+  uint age;
+  char gender;
+  uint marks[NSUBS];
+  double percentage;
+
+public:
+  void input();
+  char *getName();
+  double getPercentage();
+};
+
+void Student::input() {
+  uint s = 0, i;
+
+  cout << "Name: ";
+  cin >> this->name;
+  cout << "Branch: ";
+  cin >> this->branch;
+  cout << "Enter Enrollment number: ";
+  cin >> this->enrollment;
+  cout << "Age: ";
+  cin >> this->age;
+  cout << "Gender (m/f): ";
+  cin >> this->gender;
+
+  if (this->gender != 'm' || this->gender != 'f')
+    exit(1);
+  
+  cout << "Enter Marks for" << endl;
+
+  for (i = 0; i < NSUBS; i++) {
+    cout << "Subject " << i + 1 << ": ";
+    cin >> this->marks[i];
+
+    if (marks[i] > 100)
+      exit(1);
+    
+    s += this->marks[i];
+  }
+
+  this->percentage = (double)s / NSUBS;
+}
+
+inline char *Student::getName() { return this->name; }
+inline double Student::getPercentage() { return this->percentage; }
+
+int main() {
+  int i;
+
+  Student a[NSTUDENTS];
+
+  for (i = 0; i < NSTUDENTS; i++)
+    a[i].input();
+
+  for (i = 0; i < NSTUDENTS; i++)
+    if (a[i].getPercentage() > 70)
+      cout << a[i].getName() << endl;
+
+  return 0;
+}

lab2/file.org

@@ -0,0 +1,255 @@
+* Write a program for multiplication of two matrices using OOP. [Hint: Declare class maths and then define variables and functions inside the class].
+
+#+ATTR_LATEX: :options frame=single,breaklines=true
+#+begin_src cpp :tangle 4.cpp :results output :exports both :wrap src text
+#include <iostream>
+#include <vector>
+using namespace std;
+
+class Matrix {
+private:
+  unsigned int r, c;
+  vector<vector<int>> matrix;
+
+public:
+  Matrix() = default;
+  Matrix(int, int);
+  void init(vector<vector<int>>);
+  unsigned int getRows();
+  unsigned int getColumns();
+  Matrix operator*(Matrix);
+  void display();
+};
+
+Matrix::Matrix(int r, int c) {
+  this->r = r, this->c = c;
+  this->matrix = vector<vector<int>>(r, vector<int>(c));
+}
+
+void Matrix::init(vector<vector<int>> src) {
+  unsigned int i, j;
+
+  if (this->r > src.size())
+    exit(1);
+
+  for (i = 0; i < this->r; i++) {
+    if (c > src[i].size())
+      exit(1);
+
+    for (int j = 0; j < this->c; j++)
+      this->matrix[i][j] = src[i][j];
+  }
+}
+
+inline unsigned int Matrix::getRows() { return r; }
+
+inline unsigned int Matrix::getColumns() { return c; }
+
+Matrix Matrix::operator*(Matrix operand) {
+  unsigned int i, j, k;
+  unsigned int r, c;
+  unsigned int common;
+  Matrix m;
+
+  if (this->getColumns() != operand.getRows())
+    exit(1);
+
+  r = this->getRows();
+  c = operand.getColumns();
+
+  m = Matrix(r, c);
+
+  common = this->getColumns();
+
+  for (i = 0; i < r; i++) {
+    for (j = 0; j < c; j++) {
+      int s = 0;
+      for (k = 0; k < common; k++)
+        s += this->matrix[i][k] * operand.matrix[k][j];
+      m.matrix[i][j] = s;
+    }
+  }
+
+  return m;
+}
+
+void Matrix::display() {
+  unsigned int i, j;
+
+  for (i = 0; i < this->r; i++) {
+    for (j = 0; j < this->c; j++)
+      cout << this->matrix[i][j] << ' ';
+    cout << endl;
+  }
+}
+
+int main() {
+  Matrix a(2, 3), b(3, 4);
+  Matrix m;
+
+  a.init(vector<vector<int>>{{1, 2, -3}, {3, 2, 1}});
+
+  b.init(
+      vector<vector<int>>{{1, -4, -4, 1}, {0, 4, 4, -34}, {3, 1231, 0, -9653}});
+
+  m = a * b;
+
+  m.display();
+
+  return 0;
+}
+#+end_src
+
+#+RESULTS:
+#+begin_src text
+-8 -3689 4 28892 
+6 1227 -4 -9718 
+#+end_src
+#+LATEX: \clearpage
+
+* Create a class TIME with members hours, minutes, seconds. Take input, add two time objects passing objects to function and display the result. [Hint: use class object as parameter of function add()]
+
+#+ATTR_LATEX: :options frame=single,breaklines=true
+#+begin_src cpp :tangle 5.cpp :results output :exports both :wrap src text
+#include <iostream>
+using namespace std;
+
+class Time {
+private:
+  uint h, m, s;
+
+public:
+  Time() = default;
+  Time(uint, uint, uint);
+  Time operator+(Time);
+  void display();
+};
+
+Time::Time(uint h, uint m, uint s) {
+  if (m > 59 || s > 59)
+    exit(1);
+
+  this->h = h;
+  this->m = m;
+  this->s = s;
+}
+
+void Time::display() {
+  cout << "Hours: " << this->h << endl
+       << "Minutes: " << this->m << endl
+       << "Seconds: " << this->s << endl;
+}
+
+Time Time::operator+(Time op) {
+  Time t;
+
+  t.h = this->h + op.h;
+  t.m = this->m + op.m;
+  t.s = this->s + op.s;
+
+  t.m += t.s / 60;
+  t.s %= 60;
+
+  t.h += t.m / 60;
+  t.m %= 60;
+
+  return t;
+}
+
+int main() {
+  Time t;
+  Time a(64, 32, 7);
+  Time b(3, 59, 53);
+
+  t = a + b;
+
+  t.display();
+
+  return 0;
+}
+#+end_src
+
+#+RESULTS:
+#+begin_src text
+Hours: 68
+Minutes: 32
+Seconds: 0
+#+end_src
+#+LATEX: \clearpage
+
+* Create a class Student which has data members as name, branch, roll no, age , gender, marks in five subjects. Display the name of the student and his percentage who has more than 70%.Use array of objects size 5.[Hint: also declare percentage variable and calculate it and then compare all the object of student class to find name of student with percentage > 70]
+
+#+begin_src cpp :tangle 6.cpp :results output :exports both :wrap src text
+#include <iostream>
+
+using namespace std;
+
+const uint NSUBS = 5;
+const uint NSTUDENTS = 5;
+
+class Student {
+private:
+  char name[30];
+  char branch[20];
+  uint enrollment;
+  uint age;
+  char gender;
+  uint marks[NSUBS];
+  double percentage;
+
+public:
+  void input();
+  char *getName();
+  double getPercentage();
+};
+
+void Student::input() {
+  uint s = 0, i;
+
+  cout << "Name: ";
+  cin >> this->name;
+  cout << "Branch: ";
+  cin >> this->branch;
+  cout << "Enter Enrollment number: ";
+  cin >> this->enrollment;
+  cout << "Age: ";
+  cin >> this->age;
+  cout << "Gender (m/f): ";
+  cin >> this->gender;
+
+  if (this->gender != 'm' || this->gender != 'f')
+    exit(1);
+  
+  cout << "Enter Marks for" << endl;
+
+  for (i = 0; i < NSUBS; i++) {
+    cout << "Subject " << i + 1 << ": ";
+    cin >> this->marks[i];
+
+    if (marks[i] > 100)
+      exit(1);
+    
+    s += this->marks[i];
+  }
+
+  this->percentage = (double)s / NSUBS;
+}
+
+inline char *Student::getName() { return this->name; }
+inline double Student::getPercentage() { return this->percentage; }
+
+int main() {
+  int i;
+
+  Student a[NSTUDENTS];
+
+  for (i = 0; i < NSTUDENTS; i++)
+    a[i].input();
+
+  for (i = 0; i < NSTUDENTS; i++)
+    if (a[i].getPercentage() > 70)
+      cout << a[i].getName() << endl;
+
+  return 0;
+}
+#+end_src