t-string.cc

    
#include "io.hh"
#include "string.hh"

int main()
{
   {
      string s = "cat";
      cout << "** should say 'cat'\n";
      PRINT(s);
   }

{
      string s = "cat";
      string t;
      t = s;
      cout << "The following tests should give affirmative answer:\n";
      PRINT(strings_equal(s,t));
      t << "bat";
      PRINT(!strings_equal(s,t));
      string u;
      u = s;
      u << "bat";
      PRINT(strings_equal(t,u));
   }

{
      string a = "apple";
      string b = "banana";
      PRINT(!strings_equal(a,b));
   }
   {
      string a = "apple";
      string b = "apple";
      PRINT(strings_equal(a,b));
   }
   {
      string a = "apple";
      PRINT(strings_equal(a,"apple"));
   }
   {
      string a = "apple";
      string b = "appl";
      b << "e";
      PRINT(strings_equal(a,b));
   }

{
      string s;
//      s += "hello" += ", " += "world";
      s << "hello";
      s << ", ";
      s << "world";
      PRINT(s);
      PRINT(strings_equal(s,"hello, world"));
   }
   {
      string s;
      const char* a1 = "zip";
      s << a1;
      PRINT(s);
   }

}