minimal edit to fix the code

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#include <iostream>
#include <cmath>

using std::cout;   // http://stackoverflow.com/q/14574823/849891
using std::endl;   // minimal edit to fix your code
using std::cin;    //                      marked by //*//

int main(){
   int x,i,j;
   cout << "Please enter an integer 'x' greater than 3: " << endl;
   cin >> x;
   if (x <= 3){
        cout << "Please enter new value 'x' greater than 3: " << endl;
        cin >> x;
   }
        for(int i=3; i<=x; i++){
                for(j=2; j<i; j++){
                   if(i%j == 0)
                        break;
                   }                        //*//  add }
                   // else                  //*//  add //
                   if(i == j) // +1);       //*//  add ) //
                        cout << i << endl;
                   // }                     //*//  add //
        }
        return 0;
}