C++ Program to Print Series of Prime Number

Program 1

//Program to print series of prime number
#include<iostream>
using namespace std;
int main()
{
      int n,i,f,limit,x=1;
      system("cls");
      cout<<"Enter a a limit";
      cin>>limit;
    while(x<=limit)     
   {
       n=x;
       f=0;
       i=2;
      while(i<n) 
      {
        if(n%i==0) 
       {
            f=1;
            break;
       }
       i++; 
      }
     if(f==0)
       cout<<n<<endl
       ;
      x++;
  }
}