Thread: Class Use

Here is an example of using an array to store some data:

Code:

#include <iostream>
using namespace std;

void show(int num[], int size)
{
	for(int i = 0; i<size; i++)
	{
		cout<<num[i]<<" ";
	}
	cout<<endl;
}

int main()
{
	const int size = 3;
	int numbers[size] = {10, 20, 30};
	show(numbers, size);

	return 0;
}

However, with an array all the data must be of the same type, in this case int's. With a class, you can store different types of data in it:

Code:

#include <iostream>
#include <string>
using namespace std;


class Data
{
public:
	int num1;
	double num2;
	string str;
};


void show(Data aDataObj)
{
	cout<<aDataObj.num1<<" "<<aDataObj.num2<<" "<<aDataObj.str<<endl;
}


int main()
{
	Data myData;

	myData.num1 = 10;
	myData.num2 = 3.5;
	myData.str = "hello";

	show(myData);

	return 0;
}

So, to start, you can think of a class as an array that can store different types of values.