Write a template-based function that calculates and returns the absolute value of two numeric values passed in. The function should operate with any numeric data types (e.g., float , int , double , char ).

2)

The following code uses two arrays, one to store products and another to store product IDs (a better organization would be to use a single array of a class or struct, but that is not the subject of this Programming Project). The function getProductID takes as input the two arrays, the length of the arrays, and a target product to search for. It then loops through the product name array; if a match is found, it returns the corresponding product ID:

int getProductID( int ids[], string names[],int numProducts, string target)

{ for ( int i=0; i < numProducts; i++)

{

if (names[i] == target)

return ids[i];

}

return -1; // Not found

}

int main() // Sample code to test the getProductID function

{

int productIds[] = {4, 5, 8, 10, 13}; string products[] = {“computer”,”flash drive”,

“mouse”,”printer”,”camera”};

cout << getProductID(productIds, products, 5, “mouse”) << endl; cout << getProductID(productIds, products, 5, “camera”)

<< endl;

cout << getProductID(productIds, products, 5, “laptop”)

<< endl; return 0;

}

One problem with the implementation of the getProductID function is that it returns the special error code of -1 if the target name is not found. The caller might ignore the -1, or later we might actually want to have -1 as a valid product ID number. Rewrite the program so that it throws an appropriate exception when a product is not found instead of returning -1.

3)

A function that returns a special error code is usually better accomplished throwing an exception instead. The following class maintains an account balance.

class Account

{

private: double balance;

public:

Account()

{ balance = 0;

}

Account( double initialDeposit)

{ balance = initialDeposit;

}

double getBalance()

{ return balance;

}

// returns new balance or -1 if error double deposit( double amount)

{ if (amount > 0) balance += amount;

else

return -1; // Code indicating error

return balance;

}

// returns new balance or -1 if invalid amount double withdraw( double amount)

{ if ((amount > balance) || (amount < 0))

return -1;

else balance -= amount;

return balance;

}

};

Rewrite the class so that it throws appropriate exceptions instead of returning -1 as an error code. Write test code that attempts to withdraw and deposit invalid amounts and catches the exceptions that are thrown.