Files

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Q) Consider the following code:

int sum = 0; 
cout << "Enter numbers to add up; negative to exit: ";
while (true) {
    int value = 0;
    cin >> value;
    if (value < 0) {
        XXXXXXXXX
    } 
    sum += value;
}
cout << "Sum is: " << sum << endl;

Which of the following should replace the line XXXXXXXXX in order for the program to print the sum of a bunch of positive numbers entered by the user (ending when the user enters a negative number)?

a) return;
b) break;
c) exit(EXIT_SUCCESS);
d) exit(EXIT_FAILURE);

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Q) What is the purpose of the following function?

vector<int> baz(string fileName)
{
    vector<int> data;
    ifstream inFile(fileName);

    while (!inFile.fail()) {
        int val = 0;
        inFile >> val;

        if (!inFile.fail() && val > 0) {
            data.push_back(val);
        }
    }
    inFile.close();
    return data;
}

Assume that fileName is set to the name of a file containing integers.

a) Returns a vector of all the values from the file.
b) Returns a vector of all the values in the file, if those values are in sorted order (ascending).
c) Creates a file of all the positive values found in its vector argument.
d) Returns a vector of all the positive numbers in the file.

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Answers

b) break;
d) Returns a vector of all the positive numbers in the file.