Need Help with the following C++ Questions:

1.Indicate what the logic error is in the following code and show how to fix it.

if (pH < 3) cout << "Solution is very acidic" << endl; else if (pH >= 3 && pH < 7) cout << "Solution is acidic" << endl; else if (pH == 7) cout << "Solution is neutral" << endl; else if (pH > 7 && pH < 12) cout << "Solution is alkaline" << endl; else if (pH > 12) cout << "Solution is very alkaline" << endl; else cout << "Invalid pH value" << endl;

2.

The purpose of this function is to return the maximum value of a set of numbers in a file.

Complete the body of the loop. Do not define any other variables.

int getMax ()

{

int val; int currentMax = 0;

ifstream infile("numbers.txt", ios::in); if (! infile.is_open()) return -1;

while (infile >> num) {

// show the code that goes here

}

return currentMax;

}

3.

You have the following definition:

struct Box

{

int height;

int width;

int length;

};

and variable declaration:

Box box1;

Fill in the operator needed here to access the height field.

box1 (answer need) height

4. Write a prototype for a function named swap that takes 2 integers (num1 and num2) as reference parameters and returns the maximum of the two integers. (Don't write the body of the function, just show the prototype.)