add : cpp_programming_questions 10

Author: webwithaman

01_basics_of_c++/04_area_of_circle.cpp

@@ -10,7 +10,7 @@ using namespace std;
 // // Main Function Start
 int main()
 {
-    float radius, area;
+    double radius, area;
 
     cout << "\nEnter Radius of Circle => ";
     cin >> radius;

01_basics_of_c++/05_volume_of_cuboid.cpp

@@ -10,7 +10,7 @@ using namespace std;
 // // Main Function Start
 int main()
 {
-    float l, b, h, vol;
+    double l, b, h, vol;
 
     cout << "\nEnter Length, Breadth and Height of Cuboid to Find Volume => ";
     cin >> l >> b >> h;

01_basics_of_c++/06_average.cpp

@@ -10,7 +10,7 @@ using namespace std;
 // // Main Function Start
 int main()
 {
-    float num1, num2, num3, sum, avg;
+    double num1, num2, num3, sum, avg;
 
     cout << "\nEnter 3 Numbers to Find Average => ";
     cin >> num1 >> num2 >> num3;

03_classes_and_objects/00_questions.txt

@@ -25,4 +25,4 @@ Reverse of a Number using class.
 09. Define a class Circle and define an instance member function to find the area of the circle.
 
 10. Define a class Area and define instance member functions to find the area of the
-different shapes like square, rectangle , circle etc.
+different shapes like square, rectangle, triangle and circle etc.

03_classes_and_objects/01_complex.cpp

@@ -11,12 +11,12 @@ using namespace std;
 class Complex
 {
     // // instance member variables
-    float real;
-    float imag;
+    double real;
+    double imag;
 
 public:
     // // instance member function to set compelx number
-    void setComplex(float r, float i)
+    void setComplex(double r, double i)
     {
         real = r;
         imag = i;
@@ -34,7 +34,7 @@ class Complex
 int main()
 {
     Complex c1; // create object of Complex
-    float real, imag;
+    double real, imag;
 
     // // Get Complex number
     cout << "\n>>>>>>>> Enter A Complex Number <<<<<<<<<\n";

03_classes_and_objects/08_area_of_rectangle.cpp

@@ -11,7 +11,7 @@ using namespace std;
 class Rectangle
 {
     // // instance member variables
-    float length, breadth, area;
+    double length, breadth, area;
 
 public:
     // // instance member function to set length of rectangle
@@ -34,13 +34,13 @@ class Rectangle
     }
 
     // // instance member function to get length of rectangle
-    float getLength(int l)
+    double getLength(int l)
     {
         return length;
     }
 
     // // instance member function to get breadth of rectangle
-    float getBreadth(int b)
+    double getBreadth(int b)
     {
         return breadth;
     }
@@ -52,7 +52,7 @@ class Rectangle
     }
 
     // // instance member function to get the area of rectangle
-    int getArea()
+    double getArea()
     {
         return area;
     }
@@ -62,7 +62,7 @@ class Rectangle
 int main()
 {
     Rectangle rec1; // create object of Rectangle
-    float l, b, area;
+    double l, b, area;
 
     // // Get length and breadth of a rectangle to find its area
     cout << "\nEnter Length and Breadth of A Rectangle => ";

03_classes_and_objects/09_area_of_circle.cpp

@@ -11,7 +11,7 @@ using namespace std;
 class Circle
 {
     // // instance member variables
-    float radius, area;
+    double radius, area;
 
 public:
     // // instance member function to set radius of circle
@@ -21,7 +21,7 @@ class Circle
     }
 
     // // instance member function to get radius of circle
-    float getRadius(int l)
+    double getRadius(int l)
     {
         return radius;
     }
@@ -33,7 +33,7 @@ class Circle
     }
 
     // // instance member function to get the area of circle
-    int getArea()
+    double getArea()
     {
         return area;
     }
@@ -43,7 +43,7 @@ class Circle
 int main()
 {
     Circle cir1; // create object of Circle
-    float rad, area;
+    double rad, area;
 
     // // Get radius of a circle to find its area
     cout << "\nEnter Radius of A Circle => ";

03_classes_and_objects/10_area.cpp

@@ -0,0 +1,118 @@
+// // Define a class Shape and define an instance member function to find Reverse of a Number using class.
+
+// // Header files
+#include <iostream>
+#include <conio.h>
+#include <string.h>
+
+// // use namespace
+using namespace std;
+
+// // define class Shape
+class Shape
+{
+    // // instance member variables
+    char shape[10];
+    double dim1, dim2, area;
+
+public:
+    // // instance member function to set shape
+    void setShape(char *shp)
+    {
+        strlwr(shp);
+        strcpy(shape, shp);
+    }
+
+    // // instance member function to get shape
+    char *getShape(char *shp)
+    {
+        strcpy(shp, shape);
+        return shp;
+    }
+
+    // // instance member function to set dimensions
+    double setDimensions(double d1, double d2 = 0)
+    {
+        dim1 = d1;
+        dim2 = d2;
+    }
+
+    // // instance member function to calculate area
+    void calculateArea()
+    {
+        if (strcmp(shape, "square") == 0)
+            area = dim1 * dim1;
+        else if (strcmp(shape, "rectangle") == 0)
+            area = dim1 * dim2;
+        else if (strcmp(shape, "triangle") == 0)
+            area = (dim1 * dim2) / 2;
+        else
+            area = 22.0 / 7 * dim1 * dim1;
+    }
+
+    // // instance member function to get the area
+    double getArea()
+    {
+        return area;
+    }
+};
+
+// // Main Function Start
+int main()
+{
+    Shape square, rectangle, triangle, circle; // create objects of Shape
+    double dim1, dim2, area;
+
+    // // Get length of a square to find its area
+    cout << "\nEnter Length of A Square => ";
+    cin >> dim1;
+
+    square.setShape((char *)"square"); // set shape
+    square.setDimensions(dim1);        // set dimensions of square
+    square.calculateArea();            // find area
+
+    // // Get and display area of rectangle
+    area = square.getArea();
+    cout << "\nArea of Square => " << area;
+
+    // // Get length and breadth of a rectangle to find its area
+    cout << "\n\nEnter Length and Breadth of A Rectangle => ";
+    cin >> dim1 >> dim2;
+
+    rectangle.setShape((char *)"rectangle"); // set shape
+    rectangle.setDimensions(dim1, dim2);     // set dimensions of rectangle
+    rectangle.calculateArea();               // find area
+
+    // // Get and display area of rectangle
+    area = rectangle.getArea();
+    cout << "\nArea of Rectangle => " << area;
+
+    // // Get length and breadth of a rectangle to find its area
+    cout << "\n\nEnter Height and Breadth of A Triangle => ";
+    cin >> dim1 >> dim2;
+
+    triangle.setShape((char *)"triangle"); // set shape
+    triangle.setDimensions(dim1, dim2);    // set dimensions of triangle
+    triangle.calculateArea();              // find area
+
+    // // Get and display area of rectangle
+    area = triangle.getArea();
+    cout << "\nArea of Triangle => " << area;
+
+    // // Get radius of a circle to find its area
+    cout << "\n\nEnter Radius of A Circle => ";
+    cin >> dim1;
+
+    circle.setShape((char *)"circle"); // set shape
+    circle.setDimensions(dim1);        // set dimension of circle
+    circle.calculateArea();            // find area
+
+    // // Get and display area of circle
+    area = circle.getArea();
+    cout << "\nArea of Circle => " << area;
+
+    cout << endl; // Add new line
+    getch();
+    return 0;
+}
+// // Main Function End