Intersection Of Sets A and B Source program

Write a program to calculate intersection of set A and B in C++.

#include <iostream>
#include <conio.h>

using namespace std;

// Intersection portion

int intersection(){

int v;

int n=0,m=0,o=0;

cout<<" Enter size of Set A :  ";

cin>>n;

cout<<" Enter size of Set B :  ";

cin>>m;

int a[n],b[m],c[o];

cout<<" Enter Elements of Set A \n";

for(int i=0;i<n;i++)

{

   cin>> a[i];  

}

for (int i=0;i<n;i++){

for (int j=i;j<n;j++)

if(a[i]>a[j])

{ v=a[i];

a[i]=a[j];

a[j]=v;

}

}

for(int i=0;i<n;++i)

for(int j=i+1;j<n;)

{

if(a[i]==a[j])

{ for(int k=j;k<n-1;++k)

a[k]=a[k+1];

--n; }

else

++j; }

cout<<" Enter Elements of Set B \n";

for(int i=0;i<m;i++)

{

cin>> b[i]; }

for (int i=0;i<m;i++)

{

for (int j=i;j<m;j++)

if(b[i]>b[j])

{

v=b[i];

b[i]=b[j];

b[j]=v;

}

}

for(int i=0;i<m;++i)

for(int j=i+1;j<m;)

{

if(b[i]==b[j])

{

for(int k=j;k<m-1;++k)

b[k]=b[k+1];

--m; }

else

++j;

}

for( int i=0;i<n;i++)

{

for(int j=0;j<m;j++)

{

if(a[i]==b[j])

{

c[o]=a[i];

o++;

}

}

}

cout<<" A Intersection B = {";

for(int i=0;i<o;i++)

{

cout<<c[i];

if(i<(o-1))

{

cout<<", ";

}

} 

cout<<"}";

}

int main(){

cout<<"\t ***** INTERSECTION *****\n";

intersection();

getch();

return 0;

}