C++

C++ Programming

Slip10

Q.1) Write a C++ program to read two float numbers. Perform arithmetic binary operations
like +, - , *, / on these numbers using Inline Function. Display resultant value with a
precision of two digits. [Marks 15]

Solution

#include<iostream.h>
#include<conio.h>
inline void add(float a,float b)
{
 cout<<"\n Addition ="<<a+b;
}
inline void sub(float a,float b)
{
 cout<<"\n Substraction ="<<a-b;
}
inline void multiple(float a,float b)
{
 cout<<"\n multiplication ="<<a*b;
}
inline void divide(float a,float b)
{
 cout<<"\n Division ="<<a/b;
}
void main()
{
 float a,b;
 clrscr();
 cout<<"Enter the value of a:";
 cin>>a;
 cout<<"\nEnter the value of b:";
 cin>>b;
 cout.width(15);
 cout.precision (2);
 add(a,b);
 sub(a,b);
 multiple(a,b);
 divide(a,b);
 getch();
}


Output

Enter the value of a:9.8

Enter the value of b:3.4

 Addition =13.2
 Substraction =6.4
 multiplication =33.32
 Division =2.88


Q.2) Create a Vector class to represent a series of integer values. Allocate memory for Vector
object using new operator. Write a C++ menu driven program with following member
functions:
i. To accept a vector
ii. To display a vector in the form (10,20,30,…)
iii. To multiply by a scalar value
iv. To modify the value of a given position from vector [Marks 25]


Solution

#include<iostream.h>
#include<conio.h>
class Vector
{
  int *a;
  int n;
  public:
       void accept(int);
       void display();
       void multiply(int);
       void modify(int,int);
       Vector() { n = -1;}
};

void Vector :: modify(int pos,int x)
{
   if(pos >= 0 && pos < n)
     a[pos] = x;
   else
     cout<<"\n\t Position is not valid";
   display();
}
void Vector :: multiply(int x)
{
   for(int i=0;i<n;i++)
     a[i] *= x;
   display();
}
void Vector :: display()
{
   int i;
   cout<<"\n\tVector is (";
   for(i=0;i<n-1;i++)
     cout<<" "<<a[i]<<",";
   cout<<" "<<a[i]<<")";
}

void Vector :: accept(int size)
{
   n = size;
   a = new int[n];
   for(int i=0;i<n;i++)
   {
     cout<<"\n\tEnter a["<<i<<"]=";
     cin>>a[i];
   }
}
int main()
{
   Vector obj;
   int ch,n,pos,elem,x;
   do
   {
     cout<<"\n\t 1.Initialize";
     cout<<"\n\t 2.Display";
     cout<<"\n\t 3.Multiply with Scalar";
     cout<<"\n\t 4.Modify";
     cout<<"\n\t 5.Exit";
     cout<<"\n\tEnter your choice:";
     cin>> ch;
     switch(ch)
     {
       case 1:
   cout<<"\n\tEnter size of vector:";
   cin>>n;
   obj.accept(n);
   break;
       case 2:
   obj.display();
   break;
       case 3:
   cout<<"\n\tEnter scalar:";
   cin>>x;
   obj.multiply(x);
   break;
       case 4:
   cout<<"\n\tEnter pos:";
   cin>>pos;
   cout<<"\n\tEnter new element:";
   cin>>elem;
   obj.modify(pos,elem);
   break;
       case 5:
   break;
       default:
   cout<<"\n\tInvalid choice";
     }
   }while(ch != 5);

   getch();
   return 0;
}


Output

1.Initialize
2.Display
3.Multiply with Scalar
4.Modify
5.Exit
Enter your choice:1

Enter size of vector:3

Enter a[0]=3

Enter a[1]=5

Enter a[2]=7

1.Initialize
2.Display
3.Multiply with Scalar
4.Modify
5.Exit
Enter your choice:2

Vector is ( 0)
1.Initialize
2.Display
3.Multiply with Scalar
4.Modify
5.Exit

Enter your choice:3

Enter scalar:3

Vector is ( 0)

1.Initialize
2.Display
3.Multiply with Scalar
4.Modify
5.Exit

Enter your choice:4

Enter pos:2

Enter new element:9

Position is not valid
Vector is ( 0)
1.Initialize
2.Display
3.Multiply with Scalar
4.Modify
5.Exit
Enter your choice:2

Vector is ( 0)
1.Initialize
2.Display
3.Multiply with Scalar
4.Modify
5.Exit
Enter your choice:5