Command argument

[khatereh]

My code is working, but I need add command argument for my files.

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

template <class type> class DynamicArray
{
private:
	type *arr;
	int length = 0;
public:
	DynamicArray(int size){
		arr = new type[size];
	}

	void add(type newElement){
		arr[length] = newElement;
		++length;
	}

	void printArray(){
		for (int i = 0; i<length; ++i){
			cout << arr[i] << " ";
		}
	}

	void printArrayReversed(){
		for (int i = length - 1; i>0; --i){
			cout << arr[i] << " ";
		}
	}

	~DynamicArray(){
		delete(arr);
	}
};

int main(){
	int size = -1;
	ifstream file1;
	ifstream file2;
	ifstream file3;

	try{
		cout << "Please enter a size for the lists: ";
		cin >> size;

		if (size <= 0)
			throw "Invalid size entered.";

		DynamicArray<int> intArray(size);
		DynamicArray<char> charArray(size);
		DynamicArray<double> doubleArray(size);

		string file1Name, file2Name, file3Name;

		cout << "Enter first (int) file name: ";
		cin >> file1Name;

		if (file1Name.length() == 0)
			throw "Inavlid file name.";

		cout << "Enter second (char) file name: ";
		cin >> file2Name;

		if (file2Name.length() == 0)
			throw "Inavlid file name.";

		cout << "Enter third (double) file name: ";
		cin >> file3Name;

		if (file3Name.length() == 0)
			throw "Inavlid file name.";

		file1.open(file1Name, ios::in);
		file2.open(file2Name, ios::in);
		file3.open(file3Name, ios::in);

		if (!file1.is_open() || !file2.is_open() || !file3.is_open())
			throw "Unable to open input file";


		//reading from first file (int)
		int iTemp;
		while (file1 >> iTemp){
			intArray.add(iTemp);
		}

		//reading second file (char)
		char cTemp;
		while (file2 >> cTemp){
			charArray.add(cTemp);
		}

		//reading second file (double)
		double dTemp;
		while (file3 >> dTemp){
			doubleArray.add(dTemp);
		}

		//printing first (int) array in normal and reversed orders
		cout << endl << endl;
		intArray.printArray();
		cout << endl;
		intArray.printArrayReversed();

		//printing second (char) array in normal and reversed orders
		cout << endl << endl;
		charArray.printArray();
		cout << endl;
		charArray.printArrayReversed();

		//printing third (double) array in normal and reversed orders
		cout << endl << endl;
		doubleArray.printArray();
		cout << endl;
		doubleArray.printArrayReversed();

	}
	catch (const char *error){
		cout << endl << "ERROR: " << error << endl << endl;
	}

	system("pause");
	return 0;
}

[LendraDwi]

Use int main(int argc, char argv[][]) parameter from command line will be save in argv[]

[khatereh]

how do I save it It in argv[]? should I replace any of my variable by argv[]?

[LendraDwi]

It depends
for example

int main(int argc, char argv[][]){
    cout<<argv[1];
}

you also able to use it like this

int main(int argc, char argv[][]){
    string x=argv[1];
    cout<<x;
}