OOP 313304 Practical No.23: Write programs to read and write from/to file using Constructor, Open()

Files store the output of a program and help to perform various operations on it. Files help store these data permanently on a storage device.

Exercise:

1. Write output for the following code

Answer: 

The content of a text file testout.txt is set with the data:
Welcome to javaTpoint.
C++ Tutorial.

2.Write a program in C++ in which open a file read and write mode ad display the content on

Answer:

3. output screen using function open()

Answer:

4.Write a program in C++ in which open a file read and write mode ad display the content on output screen using constructor.

Answer:

Result

The program writes specific content to a file named testout.txt and successfully creates or overwrites the file if it opens correctly.

Practical Related Questions

1. Which operator is used to insert the data into file?

a) >> 

b) <<

c) < 

d) none of the mentioned

Answer:

b) <<

2. Which function is used to position back from the end of file object?

a) seekg ()

b) seekp()

c) both seekg() & seekp() 

d) none of the mentioned

Answer:

c) both seekg() & seekp() 

3. Write a C++ program to Read and Display File's Content.

Answer:

4. Write a C++ program to List Files in Current Directory.

Answer:

5.What is the return type open() method?

a)int

b)char

c)bool

d) float

Answer:

c) bool

6. Complete the following table:

Answer:

Conclusion

We successfully completed OOP 313304 Practical No.23 and Write programs to read and write from/to file using  Constructor, Open().