New to C++

First of all I would like to say hello to everyone,

I'm trying to learn C++. I have a pretty decent background in Java, and wanted to move over to C++.

I was working on writing insertion sort in order to learn C++, and I keep getting complier errors.

Code:

#include<iostream>

using namespace std;

class Demo
{
public:
	void insertionSort(int[]);

private:
	InsertionSort sort;

};

void Demo::insertionSort(int anArray[])
{
	Demo::sort::sort(anArray);
	cout << sort::toString();
}

public int main()
{
	Demo demo;
	int myArray [6] = {5,3,7,10,54,43};

	demo.insertionSort(myArray);
}

and

Code:

class InsertionSort
{
public:
	void sort(int[]);
	String toString();
private:
	int[] myArray;
};

void InsertionSort::sort(int [] anArray)
{
	myArray = anArray;
	for(int i = 1; i < myArray.length; i++)
		{
			int temp = myArray[i];
			int k = i - 1;
			while(k >= 0 && temp < myArray[k])
			{
				myArray[k + 1] = myArray[k];
				k--;
			}
			myArray[k + 1] = temp;
		}

}

String InsertionSort::toString()
{
	String tempStr = "";
	for(int i = 0; i < myArray.length; i++)
	{
		temp += myArray[i] + " ";
	}
}

I would like to say thank you for advance.

Could you post the compile errors as well?

Well, there are a lot of errors. There is no String (its std::string in header <string>, you can't use arrays like that (int [] myArray or int myArray[] for that matter). Arrays are not objects and don't have a length member (you'd have to pass the length separately).

There is also no need to make everything a class. In this case, perhaps 2 free functions would be enough:

Code:

void InsertionSort(int array[], unsigned length);
void PrintArray(int array[], unsigned length);

//or to be more conforming to STL conventions (could be templated later):
void InsertionSort(int* first, int* last);
void PrintArray(int* first, int* last);

Get a good book, like Thinking in C++.

Is there an API like the one in Java that I could look at. I understand I don't need so many classes I just wanted to use multiple classes to understand how to use them in C++. Like I said I have a good amount of background in Java.

You really need to use a book. There are more than just small syntax differences between C++ and Java, and if you try to use Java mentality in your C++ program you will have troubles.

cppreference.com is a decent online reference, and you can check library vendor documentation for more complete (but not official) API information. Dinkumware, SGI and Roguewave are all possible places to find that.

Ok thank you, I will probably just look up tutorials and what not.

Thinking in C++ is freely available online. If you can't/won't pay for a book, at least use the free book. It will help a lot more than a tutorial.

Originally Posted by Daved

Thinking in C++ is freely available online. If you can't/won't pay for a book, at least use the free book. It will help a lot more than a tutorial.

I don't quite understand why people seem to embrace learning without a good, highly recommended book and rather learn by the seat of their pants.

Originally Posted by medievalelks

I don't quite understand why people seem to embrace learning without a good, highly recommended book and rather learn by the seat of their pants.

Because they're cheap.

For the fun of it.

No next year I'm taking a Software development class that is in c++. The class starts like you never programmed in c++. I just wanted a head start.