Question

In C, we use FILE *inFile = fopen(“input.txt”, “r”) to open a file to read from. From the following choices, choose all of the correct ways of doing it in C++.

a. ifstream inFile(“input.txt”);

b. ifstream inFile;
   inFile(“input.txt”);

c. ifstream inFile;
   inFile.open(“input.txt”);

d. ifstream inFile = open(“input.txt”);

  

b

   

a

   

c

   

d

In C, we would use fclose(inFile) to close the previously opened input file. From the following choices, choose all of the correct ways of doing it in C++.

  

FILE.close(inFile);

   

inFile = close();

   

inFile.close();

   

close(inFile);

Answer 1

Dear Student ,

As per requirement submitted above kindly find below solution.

Question :

Answer :

a.ifstream inFile("input.txt");

c. ifstream inFile;
inFile.open("input.txt");

Explanation :Above are the correct option to open the file in C++.Either use ifstream inFile("input.txt"); or use  inFile.open("input.txt");

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Question :

Answer :inFile.close();

Explanation :In C++ :inFile.close(); is used to close the file.

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