Chapter 12: Problem 44

Write two statements that use a file stream object named places to open a file named places.dat. (Show how to open the file with a member function and at the definition of the file stream object.) The file should be opened for both input and output.

Short Answer

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Answer: We can open the file "places.dat" using a member function by first creating an fstream object named 'places' and then using the member function .open() with the appropriate file mode flags (ios::in and ios::out). To open the file at the definition of the file stream object, we include the file name and mode flags directly while creating the fstream object named 'places'.

Step by step solution

Opening the file using a member function:

To open the file "places.dat" using a member function, we first create an fstream object named 'places'. Then, we use the member function .open() with the appropriate file mode flags for opening it for both input and output. We will use the flags 'ios::in' and 'ios::out'. ```cpp #include #include int main() { std::fstream places; places.open("places.dat", std::ios::in | std::ios::out); // Perform operations with the file places.close(); } ```

Opening the file at the definition of the file stream object:

To open the file "places.dat" at the definition of the file stream object, we include the file name and mode flags directly while creating the fstream object named 'places'. Again, we will use the flags 'ios::in' and 'ios::out'. ```cpp #include #include int main() { std::fstream places("places.dat", std::ios::in | std::ios::out); // Perform operations with the file places.close(); } ```

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Write two statements that use a file stream object named places to open a file named places.dat. (Show how to open the file with a member function and at the definition of the file stream object.) The file should be opened for both input and output.

Short Answer

Step by step solution

Opening the file using a member function:

Opening the file at the definition of the file stream object:

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