What does the characters "r" and "w" mean when writing programs that will make use of files?

C Programming Language > File Input/Output > File Operation in c

Short Question

2629

Answer:

"r" means "read" and will open a file as input wherein data is to be retrieved. "w" means "write", and will open a file for output. Previous data that was stored on that file will be erased.

Go to Question List

This Particular section is dedicated to Question & Answer only. If you want learn more about C Programming Language. Then you can visit below links to get more depth on this subject.

C Syllabus

C Tutorial

C Chapterwise Programs

C Chapterwise MCQs

C Chapterwise Q & A

C Free Videos

# C Tutorials # JAVA Tutorials # HTML Tutorials # Computer Fundamental # Data Structure # DBMS Tutorials SQL # C# Language # R Language # PHP # Python # Vue JS

Join Our telegram group to ask Questions

Click below button to join our groups.

Ask Question - CSE

Programming Language - PDF

Related Program List

472. What is the difference between text files and binary files?

Answer: Text files contain data that can easily be understood by humans. It includes letters, numbers and other characters. On the other hand, binary files contain 1s and 0s that only computers can interpret.

# Tutorial: File Operation in c

Question: File Input/Output Short

473. Is it possible to create your own header files?

Answer: Yes, it is possible to create a customized header file. Just include in it the function prototypes that you want to use in your program, and use the #include directive followed by the name of your header file.

# Tutorial: About C tutorial

Question: Fundamentals of C Language Short

474. What are the different data types in C?

Answer: The basic data types are int, char, and float. Int is used to declare variables that will be storing integer values. Float is used to store real numbers. Char can store individual character values.

# Tutorial: Introduction to Data Types in C

Question: Data Types in C Language Short

475. What is the general form of a C program?

Answer: A C program begins with the preprocessor directives, in which the programmer would specify which header file and what constants (if any) to be used. This is followed by the main function heading. Within the main function lies the variable declaration and program statement.

# Tutorial: Basic Structure of C Programming

Question: Overview of C Language Short

476. What is the advantage of a random access file?

Answer: If the amount of data stored in a file is fairly large, the use of random access will allow you to search through it quicker. If it had been a sequential access file, you would have to go through one record at a time until you reach the target data. A random access file lets you jump directly to the target address where data is located.

# Tutorial: File Operation in c

Question: File Input/Output Short

477. In a switch statement, what will happen if a break statement is omitted?

Answer: If a break statement was not placed at the end of a particular case portion? It will move on to the next case portion, possibly causing incorrect output.

# Tutorial: switch case

Question: Decision Making of C Language Short

478. Describe how arrays can be passed to a user defined function

Answer: One thing to note is that you cannot pass the entire array to a function. Instead, you pass to it a pointer that will point to the array first element in memory. To do this, you indicate the name of the array without the brackets.

# Tutorial: Single Dimensional Array

Question: Array in C Language Short

479. What are pointers?

Answer: Pointers point to specific areas in the memory. Pointers contain the address of a variable, which in turn may contain a value or even an address to another memory.

# Tutorial: Pointer in C

Question: Pointer in C Language Short

480. Can you pass an entire structure to functions?

Answer: Yes, it is possible to pass an entire structure to a function in a call by method style. However, some programmers prefer declaring the structure globally, then pass a variable of that structure type to a function. This method helps maintain consistency and uniformity in terms of argument type.

# Tutorial: Function in C

Question: Function in C Language Short

481. What is gets() function?

Answer: The gets() function allows a full line data entry from the user. When the user presses the enter key to end the input, the entire line of characters is stored to a string variable. Note that the enter key is not included in the variable, but instead a null terminator is placed after the last character.

# Tutorial: Function in C

Question: Function in C Language Short

Chapterwise Java Program
Chapterwise C Program
Chapterwise Data Structure Program