"FLAMES" Using C++

#include<iostream.h>
#include<conio.h>
#include<string.h>
int main()
{
     char n1[20],n2[20],a[20],b[20];
     int i,j,tot=0;
     cout<<"\n Enter the boy name  : ";
     cin>>a;
     cout<<"\n Enter the girl name : ";
     cin>>b;
     cout<<endl;
     strcpy(n1,a);
     strcpy(n2,b);
     i=strlen(a);
     j=strlen(b);
     tot=i+j;
     for(i=0;a[i]!=NULL;i++)
    {
          for(j=0;b[j]!=NULL;j++)
          {
               if(a[i]==b[j]) //for checking same characters
              {
                   tot=tot-2;
                   b[j]='*';  //to avoid duplication
                   break;
               }
          }
     }
cout<<"\n count = "<<tot<<endl;
if(tot == 2 ||tot== 4 || tot==7 ||tot==9 )
cout<<   n1 << " and " << n2 << " are Enemy";
else if( tot == 3 ||tot==5 || tot==14 ||tot==16 || tot==18 )
cout<<   n1 << " and " << n2 << " are Friends";
else if( tot == 8 || tot==12 || tot==17)
cout<<   n1 << " and " << n2 << " in Affection";
else if( tot == 10)
cout<<   n1 << " and " << n2 << " Love";
else if( tot == 6 || tot==11 || tot==15)
cout<<   n1 << " and " << n2 << " will arriage";
else
cout<<   n1 << " and " << n2 << " are SweetHearts";
getch();
return 0;
}