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Service install on window system

 If we have to install service make sure,  .interframework install already. Goto folder like:-  C:\Windows\Microsoft.NET\Framework\v2.0.50727  C:\Windows\Microsoft.NET\Framework\ v2.0.50727 (Note: version folder can be change as the version change.) Open command prompt by  writing the "cmd" in the box of file/folder location shoes Run the command : "installUtil.exe pathofexeofthe service"
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7 features of OOPs

The 7 features of OOPs are as follows: 1. Incapsulation 2. Abstraction 3. Inheritance 4. Polymorphism 5. Object must be used 6. Massage passing : One object can interect with another object 7. Dynamic binding The most initial 4 are the basic OOPs features that is required.
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Sieve Erotosthenes program in c++

  #include <bits/stdc++.h> using namespace std ; /* this program is for finding the prime number till the given number */ void primeSieve ( long long n ) {     long long prime [ n + 1 ] = { 0 };     for ( long long i = 2 ; i <= n ; i ++ )     {         if ( prime [ i ] == 0 )         for ( long long j = i * i ; j <= n ; j += i )         {             prime [ j ] = 1 ;         }             }     for ( long long i = 2 ; i <= n ; i ++ )     {         if ( prime [ i ] == 0 )         cout << i << " " ;     }         } int main () {     long long n ;     cin >> n ;     primeSieve ( n );     return 0 ; }
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