Command Line arguments

[aab1990]

I have been toying with this code for a few minutes, and I cannot find a way to convert the third argument from the command line to an int.

int main( int argc, char *argv[] )
{
	try
	{
		unsigned int size = int ( argv[2] );
		
		cout << size << endl;

		vector<int> randvector;
		srand(1000);
		
		for(int count=0; count < size; count += 2)
		{
			randvector[count] = rand() % 100;
		}
		
		for(int count=1; count < size; count += 2)
		{
			randvector[count] = - ( rand() % 100);
		}
		
		cout << randvector.size() << endl;
		
		for( int x = 0 ; x < 20; x++ )
		{
			int y;
			y = randvector[x];
			cout << y << endl;
		}
		
	}
	catch( ... )
	{ exit(1); }
}

Thanks in advance for any help.

[firedraco]

Use a stringstream:

int my_int = 0;
std::stringstream str(argv[1]);
str >> my_int;

You need to include sstream to use it though.

[helios]

{
    std::stringstream stream(argv[2]);
    if (!(stream >>size))
        //not a number
}