string of numbers into int?

How would I turn a string with regular numbers in it into an int. I need to turn something like char tmp[3] into int x.

atoi()

Here is the FAQ for string to int conversion. It is a very good FAQ.. because it helped me write this function that I used in my blackjack game:

Code:

//Converts the first character of a playing card from 'string' to 'int' so numeric comparisons can be made.
//Example:  string '2 of Diamonds' will be converted to integer '2'
//istringstream can only accept the &address of the character to be streamed to integer
int card_value(string card)  
{
	int result = 0;
	
	char *card_ptr;
	
	card_ptr = &card[0];	//string class variables can be treated like arrays	

	istringstream myStream(card_ptr); //create a 'myStream' object of class istringstream 
  
	if (myStream >> result)	//String to Integer conversion (works only for numeric face values)
    					 
		return result;		//return an integer value 2 thru 10

	    
	else
	{
    
		if (*card_ptr != 'A')

			return 10;	//'J', 'Q', and 'K' will return a face value of 10

		else

			return 11; //'A' will return a value of 11

	}


}