CPP program:
Theory:
Vector
-
Vectors are sequence containers representing arrays that can change in size.
Just like arrays, vectors use contiguous storage locations for their
elements, which means that their elements can also be accessed using
offsets on regular pointers to its elements, and just as efficiently as
in arrays. But unlike arrays, their size can change dynamically, with
their storage being handled automatically by the container.
- The STL vector class is a template class of
sequence containers that arrange elements of a given type in a linear
arrangement and allow fast random access to any element. They should be
the preferred container for a sequence when random-access performance is
at a premium.
******************************************************************************************************
#include<iostream>
using namespace std;
template<class T>
class vector
{
T v[10];
int size;
public:
void create();
void modify();
void multiplication();
void display();
};
template<class T>
void vector<T>::create()
{
int i;
T value;
char ans;
size=0;
do
{
cout<<"\nEnter Index and Value:\n";
cin>>i>>value;
v[i]=value;
size++;
cout<<"\nDo you want enter more elements?";
cin>>ans;
}while(ans=='y');
}
template<class T>
void vector<T>::modify()
{
int key;
T newvalue;
cout<<"\nFor modification enter the index of vector:";
cin>>key;
cout<<"\nEnter modifyed value";
cin>>newvalue;
v[key]=newvalue;
}
template<class T>
void vector<T>::multiplication()
{
int i,scalarval;
cout<<"\nEnter scalar";
cin>>scalarval;
for(i=0;i<size;i++)
v[i]=v[i]*scalarval;
}
template<class T>
void vector<T>::display()
{
int i;
cout<<"size of vector="<<size<<endl;
cout<<"Elements in the vector are:\n";
cout<<"(";
for(i=0;i<size;i++)
cout<<v[i]<<"";
cout<<")";
}
int main()
{
int ch;
char ans;
vector<int>obj;
cout<<"\n\t------------------------------------------";
cout<<"\n\tProgram for representing generic vector using class template";
cout<<"\n\t------------------------------------------";
do
{
cout<<"\nMain Menu";
cout<<"\n1.Create\n2.Display\n3.Modify\n4.Multiplication";
cout<<"\nEnter your choice";
cin>>ch;
switch(ch)
{
case 1:
obj.create();
break;
case 2:
obj.display();
break;
case 3:
obj.modify();
break;
case 4:
obj.multiplication();
break;
}
cout<<"\nDo you want to continue?(y/n):";
cin>>ans;
}while(ans=='y');
return 0;
}
