Consider the following program segment. ifstream infile; //line 1 int x, y; //line 2 //line 3 infile > > x > > y; //line 4 which of the following statements at line 3 can be used to open the file progdata. dat and input data from this file into x and y at line 4?
a. infile. open("progdata. dat");
b. open(infile, "progdata. dat");
c. infile (open, "progdata. dat");
d. open. infile("progdata. dat");

The answer to this question is the option "a".

The statement for opening file can be given as:  

inFile.open("progdata.dat");

Explanation:

In the above statement, this statement is part of the c++ programming language. To open any file we use the following syntax that can be given as:

Syntax:

inFile.open(filename, mode);

In the above syntax inFile.open() is a function that opens the file. In this function, we pass two parameters that are filename, mode. Where filename is the name of the file which we want to open. In the filename, we write file names with the path of the file like(C:\Users\Public\Music\Sample Music\abc.dat) where (C:\Users\Public\Music\Sample Music) is the path of the file and (abc.dat) is a file name. In the mode parameter, it provides the mode in which we want to open a file. There are two types of read mode and write mode. The default mode is read mode.

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