#include <string>
#include <iostream>
 
using namespace std;
 
int main()
{
   string a("abcd efg");        //  or a="abcd efg";
   string b("xyz ijk");
   string c;
 
 cout << "String empty: "    << c.empty()    << endl;  // String empty: 1
 c = a + b;                                            // concatenation
 cout << c << endl;                                    // abcd efgxyz ijk
 string d = c;
 cout << d << endl <<"\n\n";                     // abcd efgxyz ijk
 
 
  string g("abc abc abd abc");
  cout << "String g: " << g << endl;                    // String g: abc abc abd abc
  cout << "Replace 12,1,\"xyz\",3: " << g.replace(12,1,"xyz",3) << endl;  // Replace 12,1,"xyz",3: abc abc abd xyzbc
  cout << g.replace(0,3,"xyz",3) << endl;               // xyz abc abd xyzbc
  cout << g.replace(4,3,"xyz",3) << endl;               // xyz xyz abd xyzbc
  cout << g.replace(4,3,"ijk",1) << endl;               // xyz i abd xyzbc
  cout << "Find: " << g.find("abd",1) << endl;          // Find: 6
  cout << g.find("qrs",1) << endl << "\n\n" ;
 
   string h("abc abc abd abc");
   cout << "String h: " << h << endl;
   cout << "Find \"abc\",0: " << h.find("abc",0) << endl; // Find "abc",0: 0
   cout << "Find \"abc\",1: " << h.find("abc",1) << endl; // Find "abc",1: 4
 
   return 0;
} 
 
/**
 * References:
 * www.cplusplus.com/
 * https://sites.google.com/site/smilitude/
 * */