Question

Explain the 2 methods of opening a data file in C++​

Answer 1

Answer:

Explanation:

Either ofstream or fstream object may be used to open a file for writing. And ifstream object is used to open a file for reading purpose only. Following is the standard syntax for open() function, which is a member of fstream, ifstream, and ofstream objects. void open(const char *filename, ios::openmode mode);

Answer 2

Answer: 20

Explanation: 2*8^1+4*8^0

= 16 + 4 = 20