/* problem 6 */

int num;
int negSum = 0;

cout << "enter a number> ";
cin >> num;

while (num != 0){

    if (num < 0){
	negSum += num;
    }

    cout << "enter a number> ";
    cin >> num;
}

cout << "sum of negative numbers = " << negSum << endl;


/* problem 7 */

void ChangeChar(String & s, char oldChar, char newChar)
{
    int k;

    int len = s.Length();

    for(k = 0; k < len; k++){
	if (s[k] == oldChar){
	    s[k] = newChar;
	}
    }
}


/* problem 8 */

double DiveScore(double scores[], int numScores, int diffFactor)
{
    double low = scores[0];
    double high = scores[0];
    double sum = 0;

    int k;

    for(k = 1; k < numScores; k++){
	sum += scores[k];

	if (scores[k] > high){
	    high = scores[k];
	}
	if (scores[k] < low){
	    low = scores[k];
	}
    }

    double avg = (sum - low - high)/(numScores - 2);

    return avg*diffFactor;
}

/* problem 9 */

StockBroker broker;
String name;

cout << "enter name of stock ";
cin >> name;

double openPrice = broker.OpeningPrice(name);
double sellPrice = 2*openPrice;

double price = broker.CurrentPrice(name);
int queries = 1;

const int MAX_TRADES = 10000;

while (queries < MAX_TRADES && price <= sellPrice){
    queries++;
    price = broker.CurrentPrice(name);
}

if (price > sellPrice){
    cout << ...
}
else{
    cout << ...
}


/* extra problem */

int longRun = 0;
int run = 0;
Coin dime;
int k;

for(k=0; k < numTosses; k++){
    if (dime.Flip() == 0){     // tossed a tail?
	run++;
    }
    else{
	run = 0;
    }
    if (run > longRun){
	longRun = run;
    }
}
return longRun;