C++

C++ Programming

Slip13

Q.1) Write a C++ program to calculate area of cone, sphere and circle by using function
overloading. [Marks 15]

Solution

#include<iostream.h>
#include<conio.h>
#include<math.h>
class shape
{
 private:
int r,h;   // A=ãr(r+h2+r2)
float A;
 public:
void accept(int a,int b);
void area(int r,int h);
void area(int r);
void area();


};
void shape:: accept(int a,int b)
{
 r=a;
 h=b;
}
void shape:: area(int r,int h)
{
 A=3.14*r*(r+sqrt(h*h+r*r));
 cout<<"Area of cone:"<<A;
}
void shape:: area(int r)
{
 A=4*3.14*r*r;      //A=4ãr2
 cout<<"\nArea of shpere:"<<A;
}
void shape:: area()
{
 A=3.14*r*r;         //A=ãr2
 cout<<"\nArea of circle:"<<A;
}
void main()
{
 shape s1;
 int a,b;
 clrscr();
 cout<<"Enter the value:";
 cin>>a>>b;
 s1.accept(a,b);
 s1.area(a,b);
 s1.area(a);
 s1.area();
 getch();
}


Output

Enter the value:
3                                                                             
2                                                                             
Area of cone:62.224293                                                       
Area of shpere:113.040001                                                     
Area of circle:28.26


Q.2) Create a class Matrix and Write a C++ program with following functions:
i. To accept a Matrix
ii. To display a Matrix
iii. Overload unary minus ‘ – ‘ operator to calculate transpose of a Matrix
iv. Overload binary multiplication '*’ operator to calculate multiplication of two
matrices [Marks 25]

Solution

#include<iostream.h>
#include<conio.h>
class matrix
{
int a[3][3];
public:
matrix operator *(matrix);
void operator -();
void getdata();
void display();
};
void matrix::getdata()
{
int i,j;
for(i=0;i<3;i++)
    for(j=0;j<3;j++)
       {
    cout<<"Enter elements : ";
    cin>>a[i][j];
       }
}
void matrix::display()
{
int i,j;
for(i=0;i<3;i++)
{
    for(j=0;j<3;j++)
       {    cout<<" ";
    cout<<a[i][j];
       }
cout<<endl;
}
}
matrix matrix::operator *(matrix m2)
{
int i,j;
matrix m3;
for(i=0;i<3;i++)
    for(j=0;j<3;j++)
      m3.a[i][j]=a[i][j] * m2.a[i][j];
return m3;
}
void matrix::operator -()
{
int i,j,temp;
for(i=0;i<3;i++)
    for(j=i+1;j<3;j++)
    {
temp=a[i][j];
a[i][j]=a[j][i];
a[j][i]=temp;
    }
}
int main()
{       clrscr();
int choice;
matrix m,m1,m2,m3;
do
{
cout<<"\n1: To accept a matrix \n2: To display a matrix"<<endl;
cout<<"3:Overload unary minus '-' operator to calculate transpose of matrix"<<endl;
cout<<"4:Overload binary operator '*' operator to multiplicatio of two matrix"<<endl;
cout<<"Enter your choice : ";
cin>>choice;
switch(choice)
{
case 1:cout<<"Enter Matrix for transpose : "<<endl;
       m.getdata();
       cout<<"Enter two Matrix for multiplication : "<<endl;
       cout<<"First matrix: "<<endl;
       m1.getdata();
       cout<<"Second matrix: "<<endl;
       m2.getdata();
       break;
case 2:cout<<"Matrix for transpose : "<<endl;
       m.display();
       cout<<"Two Matrix for multiplication : "<<endl;
       cout<<"First matrix: "<<endl;
       m1.display();
       cout<<"Second matrix: "<<endl;
       m2.display();
       break;
case 3: cout<<"Original matrix : "<<endl;
m.display();
-m;
cout<<"transpose of matrix : "<<endl;
m.display();
break;
case 4: m3=m1*m2;
cout<<"matrix 1 display : "<<endl;
m1.display();
cout<<"matrix 2 display : "<<endl;
m2.display();
cout<<"multiplication of matrix : "<<endl;
m3.display();
break;
}
}while(choice!=5);
getch();
return 0;
}