DaniWeb Forum Index > Software Development > C++

MyString Woes

Please support our C++ advertiser: Programming Forums - DaniWeb Sister Site

•

Join Date: Jun 2004

Posts: 434

Reputation: FC Jamison is on a distinguished road

Solved Threads: 20

FC Jamison FC Jamison is offline

Offline

Posting Pro in Training

MyString Woes

Jan 16th, 2007

I was absent for the discussion and lab due to illness and I am at a total loss as to how to do this assignment.

Implement the my_string class in header file my_string.h, so that the test code given below reports SUCCESS.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
// test_my_string.cpp
 
#include <iostream>
#include <string>
#include <cassert>
#include "my_string.h"
 
using namespace std;
 
//#define STRING string
#define STRING my_string
 
int main()
{
   STRING s1; // s1 == ""
   assert(s1.length() == 0);
 
   STRING s2("hi");  // s2 == "hi"
   assert(s2.length() == 2);
 
   STRING s3(s2);  // s3 == "hi"
   assert(s3.length() == 2);
   assert(s3[0] == 'h');
   assert(s3[1] == 'i');
 
   s1 = s2;  // s1 == "hi"
 
   s3 = "bye";  // s3 == "bye"
   assert(s3.length() == 3);
   assert(s3[0] == 'b');
   assert(s3[1] == 'y');
   assert(s3[2] == 'e');
 
   s1 += "re";  // s1 == "hire"
   assert(s1.length() == 4);
   assert(s1[0] == 'h');
   assert(s1[1] == 'i');
   assert(s1[2] == 'r');
   assert(s1[3] == 'e');
 
   cout << "SUCCESS" << endl;
// test_my_string.cpp

#include <iostream>
#include <string>
#include <cassert>
#include "my_string.h"

using namespace std;

//#define STRING string
#define STRING my_string

int main()
{
   STRING s1; // s1 == ""
   assert(s1.length() == 0);

   STRING s2("hi");  // s2 == "hi"
   assert(s2.length() == 2);

   STRING s3(s2);  // s3 == "hi"
   assert(s3.length() == 2);
   assert(s3[0] == 'h');
   assert(s3[1] == 'i');

   s1 = s2;  // s1 == "hi"

   s3 = "bye";  // s3 == "bye"
   assert(s3.length() == 3);
   assert(s3[0] == 'b');
   assert(s3[1] == 'y');
   assert(s3[2] == 'e');
   
   s1 += "re";  // s1 == "hire"
   assert(s1.length() == 4);
   assert(s1[0] == 'h');
   assert(s1[1] == 'i');
   assert(s1[2] == 'r');
   assert(s1[3] == 'e');

   cout << "SUCCESS" << endl;

I cannot get the program to get past

assert(s3[0] == 'h');

nor can I get cout << s3[0]; to work.

What am I missing here?

Last edited by FC Jamison; Jan 16th, 2007 at 1:54 am.

•