oops week 23

Week 23 solutions

23a) Write a C++ program to write a function template 
for finding the minimum value contained in any array.

Program:

#include<iostream>
#include<vector>
using namespace std;
template<class T>
T min(T a[],T n) 
{
   T temp=a[0];
   for (int i = 0; i <n; ++i)
   {
    if(temp>=a[i])
   temp=a[i];
 }   
  
 return temp;
}
int main()
{
 int a[20];
 int n=0,res;
 cout<<"Enter the elements of array\n";
 while(cin>>a[n])
 {
  n++;
 }
 res=min(a,n); 
 cout<<"Minimum of all elements is :"<<res<<endl;
}


Output: 

Enter the elements of array
25
7
9
36
55
77
8
2
*
Minimum of all elements is :2

 

23b) Write a template function that takes a vector<T> vt and a vector<U> vu
as arguments and returns the sum of all vt[i]*vt[i]s.

program:

#include<iostream>
#include<vector>
using namespace std;
vector<double>vt,vu;
template<class T>
T value(vector<T>a,vector<T>b)
{
 T sum=0;
 for(int i=0;i<a.size();i++)
 {
  cout<<a[i]<<"\t"<<b[i]<<"\t"<<a[i]*b[i]<<endl;
  sum+=a[i]*b[i];
 }
 return sum;
}
int main()
{
 double p,w;
 double val;
 cout<<"Enter the elements of two vectors sinultaneously (enter character to quit)\n";
 cout<<"\n----------Reading values-------- \n";
 while(cin>>p&&cin>>w) 
 {
  vt.push_back(p);
  vu.push_back(w);
 }
 val=value(vt,vu);
 cout<<"\nSum of products is : ="<<val<<endl;
}

output: 

Enter the elements of two vectors sinultaneously (enter character to quit)

----------Reading values--------
1 2
2 3
3 4
4 5
6 10
*
1       2       2
2       3       6
3       4       12
4       5       20
6       10      60

Sum of products is : =100

23c)  Define a class Int having a single member of class int. Define 
constructors, assignment,and operators +,-,*,/ for it.

program:

#include <iostream>
using namespace std;
 
class Int
{
   public:
   int a;
};
int main()
{
 Int x;
 int b;
 cout<<"Enter an integer :\n";
 cin>>b;
 x.a=b;
 cout<<"\nvalue of a is:"<<x.a;
 x.a+=10;
 cout<<"\nAfter adding 10 value of a is:"<<x.a;
 
}

output: 

Enter an integer :
22

value of a is:22
After adding 10 value of a is:32


 

23d)  Implement vector::operator=() using an allocator for memory management

program:

#include <iostream>
#include <vector>
using namespace std;
int main ()
{
   vector<int> foo (3,0);
   vectorlt;int> bar (5,0);
 
   bar = foo;
   foo = vector<int>();
 
   cout << "Size of foo: " << int(foo.size()) << '\n';
   cout << "Size of bar: " << int(bar.size()) << '\n';
   return 0;
}
output: 

Size of foo: 0
Size of bar: 3