Back-End Programming Exam > Back-End Programming Videos > Learn to Program with C++: Beginner to Expert > C++ Programming Tutorials - Cool Program Working with Files
C++ Programming Tutorials - Cool Program Working with Files Video Lecture | Learn to Program with C++: Beginner to Expert - Back-End Programming
|
73 videos|7 docs|23 tests
|
FAQs on C++ Programming Tutorials - Cool Program Working with Files Video Lecture - Learn to Program with C++: Beginner to Expert - Back-End Programming
| 1. How can I open a file in C programming? |  |
Ans. In C programming, you can open a file using the `fopen()` function. This function takes two parameters: the name of the file to be opened and the mode in which you want to open it. For example, to open a file named "example.txt" in read mode, you can use the following code:
```c
FILE *file = fopen("example.txt", "r");
```
This code will return a file pointer, which you can use to perform various operations on the file.
| 2. How can I check if a file exists in C programming? | |
Ans. To check if a file exists in C programming, you can use the `access()` function. This function takes two parameters: the name of the file and the mode in which you want to check the file's accessibility. For example, to check if a file named "example.txt" exists, you can use the following code:
```c
if (access("example.txt", F_OK) != -1) {
printf("File exists.\n");
} else {
printf("File does not exist.\n");
}
```
Here, `F_OK` is the mode indicating that you want to check if the file exists. If the `access()` function returns `-1`, it means the file does not exist.
| 3. How can I read from a file in C programming? | |
Ans. To read from a file in C programming, you can use the `fscanf()` function. This function takes three parameters: the file pointer, the format specifier, and the address of the variable where you want to store the read value. For example, to read an integer from a file named "example.txt", you can use the following code:
```c
FILE *file = fopen("example.txt", "r");
int num;
if (file != NULL) {
fscanf(file, "%d", &num);
printf("Read value: %d\n", num);
fclose(file);
} else {
printf("Failed to open the file.\n");
}
```
This code opens the file in read mode, reads an integer from it using the `%d` format specifier, and stores the value in the `num` variable.
| 4. How can I write to a file in C programming? | |
Ans. To write to a file in C programming, you can use the `fprintf()` function. This function takes two parameters: the file pointer and the content you want to write. For example, to write a string to a file named "example.txt", you can use the following code:
```c
FILE *file = fopen("example.txt", "w");
if (file != NULL) {
fprintf(file, "Hello, world!");
fclose(file);
} else {
printf("Failed to open the file.\n");
}
```
This code opens the file in write mode, writes the string "Hello, world!" to it, and then closes the file.
| 5. How can I append to a file in C programming? | |
Ans. To append to a file in C programming, you can use the `fopen()` function with the "a" mode instead of "w" mode. This will open the file in append mode, allowing you to write content at the end of the file without overwriting the existing content. For example, to append a string to a file named "example.txt", you can use the following code:
```c
FILE *file = fopen("example.txt", "a");
if (file != NULL) {
fprintf(file, "This is an appended string.");
fclose(file);
} else {
printf("Failed to open the file.\n");
}
```
This code opens the file in append mode, writes the string "This is an appended string." to it, and then closes the file. The new content will be added at the end of the file, preserving the existing content.
Related Exams
About this Video
|
4.64/5 Rating |
|
Dec 23, 2024 Last updated |
Video Description: C++ Programming Tutorials - Cool Program Working with Files for Back-End Programming 2024 is part of Learn to Program with C++: Beginner to Expert preparation.
The notes and questions for C++ Programming Tutorials - Cool Program Working with Files have been prepared according to the Back-End Programming exam syllabus.
Information about C++ Programming Tutorials - Cool Program Working with Files covers all important topics for Back-End Programming 2024 Exam.
Find important definitions, questions, notes, meanings, examples, exercises and tests below for C++ Programming Tutorials - Cool Program Working with Files.
Introduction of C++ Programming Tutorials - Cool Program Working with Files in English is available as part of our Learn to Program with C++: Beginner to Expert for Back-End Programming & C++ Programming Tutorials - Cool Program Working with Files in
Hindi for Learn to Program with C++: Beginner to Expert course. Download more important topics related with notes, lectures and mock test series for
Back-End Programming Exam by signing up for free.
Description
Video Lecture & Questions for C++ Programming Tutorials - Cool Program Working with Files Video Lecture | Learn to Program with C++: Beginner to Expert - Back-End Programming - Back-End Programming full syllabus preparation | Free video for Back-End Programming exam to prepare for Learn to Program with C++: Beginner to Expert.
Information about C++ Programming Tutorials - Cool Program Working with Files
Here you can find the meaning of C++ Programming Tutorials - Cool Program Working with Files defined & explained in the simplest way possible.
Besides explaining types of C++ Programming Tutorials - Cool Program Working with Files theory, EduRev gives you an ample number of questions to practice C++ Programming Tutorials - Cool Program Working with Files tests,
examples and also practice Back-End Programming tests.
|
73 videos|7 docs|23 tests
|
|
Explore Courses for Back-End Programming exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Semester Notes
,Sample Paper
,ppt
,shortcuts and tricks
,Objective type Questions
,study material
,Extra Questions
,Summary
,mock tests for examination
,Free
,Previous Year Questions with Solutions
,C++ Programming Tutorials - Cool Program Working with Files Video Lecture | Learn to Program with C++: Beginner to Expert - Back-End Programming
,Viva Questions
,C++ Programming Tutorials - Cool Program Working with Files Video Lecture | Learn to Program with C++: Beginner to Expert - Back-End Programming
,Exam
,video lectures
,Important questions
,past year papers
,practice quizzes
,C++ Programming Tutorials - Cool Program Working with Files Video Lecture | Learn to Program with C++: Beginner to Expert - Back-End Programming
,MCQs
;
Study C++ Programming Tutorials - Cool Program Working with Files on the App
Students of Back-End Programming can study C++ Programming Tutorials - Cool Program Working with Files alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the C++ Programming Tutorials - Cool Program Working with Files,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of C++ Programming Tutorials - Cool Program Working with Files is prepared as per the latest Back-End Programming syllabus.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup