[Valmont]

Your code looks more like C instead of C++, but here is the C++ version.

#include <iostream>
#include <string>

//- using std::string;
using std::endl;
using std::cout;
using std::cin;
//- int main()
{
  string s1("test 1");
  string s2("test 2");
  string s3("test 3");
  //etc...
  
  string MyStringArray[3]={s1, s2, s3};
  
  cout<<"Choose a number from 1 to 3"<<endl;
  unsigned idx;
  cin>>idx;
  cin.get();
  if(idx > 0 && idx <= 3)
  {
    cout<<MyStringArray[idx-1]<<endl;
  }  
  
  return 0;
}