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How you can delete the data in the file when you open the file in read or write mode in C programming?
When you open a file in write mode, eg. fp=fopen("filename.txt","w"); the content of the file is deleted.
What is file mode in c plus plus?
There are 6 main types of file opening mode:* "r". Open file for reading and file must exist; * "w" Open file for writing. If file does not exist it is created or if life already exist it's content is erased. * "a" Open file for appending. It adds all information at the end of the file leaving old data untouched. If file does not exist it is created. * "r+" Open file for reading and writing and file must exist. * "w+" Open file for writing and reading. If file does not exist it is created or if life already exist it's content is erased. * "a+" Open file for appending and reading. Again all new data is written at the end of the file old data leaving untouched. If file does not exist it is created. (You can read old data by moving pointer in file using fseek or rewind functions from stdio.h. But all writing operations will be done at the end of the file no matter how you change pointer) It is assumed by default that file will be standard ASCII text file in order to open file as binary file, you need to add "b" indicator:FILE *myFile = fopen("myfile.txt", "wb");/ * following two has identical meaning */FILE *myFile = fopen("myfile.txt", "w+b");FILE *myFile = fopen("myfile.txt", "wb+");
What is file mode and list various file mode operations available?
A file mode describes how a file is to be used, to read, to write to append etc. When you associate a stream with a file, either by initializing a file stream object with a file name or by using open() method, you can provide a second argument specifying the file mode. e.g. stream_object.open("filename",filemode); Following is the list of filemodes available in C++ ios::in ios::out ios::binary ios::ate ios::app ios::trunc ios::nocreate ios::noreplace
What is a statement used to open data file in c plus plus?
FILE* fopen(<filename>, <mode>); E.g., FILE* f = fopen("C:\\Users\\<user_name>\\My Documents\\data_file.dat", "rb"); Opens the specified file for reading ("r") in binary mode ("b").
What is the difference between binary file and text file in java?
HI... When you access a file from within C or C++ you have a choice between treating the file as a binary file or as a text file. C uses the fopen(file,mode) statement to open a file and the mode identifies whether you are opening the file to read, write, or append and also whether the file is to be opened in binary or text mode. C++ opens a file by linking it to a stream so you don't specify whether the file is to be opened in binary or text mode on the open statement. Instead the method that you use to read and/or write to the file determines which mode you are using. If you use the operator to write to the file then the file will be accessed in text mode. If instead you use the put() and get() or read()and write() functions then the file will be accessed in binary mode. So what exactly is the difference between text and binary modes? Well the difference is that text files contain lines (or records) of text and each of these has an end-of-line marker automatically appended to the end of it whenever you indicate that you have reached the end of a line. There is an end of line at the end of the text written with the C fwrite() function or in C++ when you
What is the proper method of opening a file for writing as binary file?
To open a file for writing as a binary file in Python, you should use the open() function with the mode set to 'wb'. This mode stands for "write binary," allowing you to write binary data to the file. For example, you can use open('filename.bin', 'wb') to create and write to a binary file named filename.bin. Always remember to close the file using the close() method or by using a with statement to ensure proper resource management.
Programming files in binary access mode in qbasic?
In QBasic, programming files in binary access mode allows you to read from and write to files using binary data rather than text. You can open a file in binary mode using the OPEN statement with the FOR BINARY option. This mode is particularly useful for handling non-text data, such as images or compiled objects, as it provides direct control over the byte-level representation. Use the GET and PUT statements to read from and write to the binary file.
How can a binary file be saved?
A binary file can be saved by opening a file in binary mode using programming languages like Python, C, or Java. In Python, for example, you can use the open() function with the 'wb' (write binary) mode, and then write the binary data using methods like write(). It's important to ensure that the data is in the correct binary format before saving. Finally, close the file to ensure all data is properly written and resources are freed.
How you can delete the data in the file when you open the file in read or write mode in C programming?
When you open a file in write mode, eg. fp=fopen("filename.txt","w"); the content of the file is deleted.
How you can delete the data in the file by opening it in the C programming in read or write mode?
To delete all the existing data in a file, simply open it in write mode. If you open the file in append mode, you need to overwrite the existing data to delete part or all of that data.
What is file mode in c plus plus?
There are 6 main types of file opening mode:* "r". Open file for reading and file must exist; * "w" Open file for writing. If file does not exist it is created or if life already exist it's content is erased. * "a" Open file for appending. It adds all information at the end of the file leaving old data untouched. If file does not exist it is created. * "r+" Open file for reading and writing and file must exist. * "w+" Open file for writing and reading. If file does not exist it is created or if life already exist it's content is erased. * "a+" Open file for appending and reading. Again all new data is written at the end of the file old data leaving untouched. If file does not exist it is created. (You can read old data by moving pointer in file using fseek or rewind functions from stdio.h. But all writing operations will be done at the end of the file no matter how you change pointer) It is assumed by default that file will be standard ASCII text file in order to open file as binary file, you need to add "b" indicator:FILE *myFile = fopen("myfile.txt", "wb");/ * following two has identical meaning */FILE *myFile = fopen("myfile.txt", "w+b");FILE *myFile = fopen("myfile.txt", "wb+");
What is file mode and list various file mode operations available?
A file mode describes how a file is to be used, to read, to write to append etc. When you associate a stream with a file, either by initializing a file stream object with a file name or by using open() method, you can provide a second argument specifying the file mode. e.g. stream_object.open("filename",filemode); Following is the list of filemodes available in C++ ios::in ios::out ios::binary ios::ate ios::app ios::trunc ios::nocreate ios::noreplace
What is a statement used to open data file in c plus plus?
FILE* fopen(<filename>, <mode>); E.g., FILE* f = fopen("C:\\Users\\<user_name>\\My Documents\\data_file.dat", "rb"); Opens the specified file for reading ("r") in binary mode ("b").
Example for w plus mode in c?
1. open the file: fopen (name, "w+") 2. write into it 3. rewind 4. read from the file
What is the difference between binary file and text file in java?
HI... When you access a file from within C or C++ you have a choice between treating the file as a binary file or as a text file. C uses the fopen(file,mode) statement to open a file and the mode identifies whether you are opening the file to read, write, or append and also whether the file is to be opened in binary or text mode. C++ opens a file by linking it to a stream so you don't specify whether the file is to be opened in binary or text mode on the open statement. Instead the method that you use to read and/or write to the file determines which mode you are using. If you use the operator to write to the file then the file will be accessed in text mode. If instead you use the put() and get() or read()and write() functions then the file will be accessed in binary mode. So what exactly is the difference between text and binary modes? Well the difference is that text files contain lines (or records) of text and each of these has an end-of-line marker automatically appended to the end of it whenever you indicate that you have reached the end of a line. There is an end of line at the end of the text written with the C fwrite() function or in C++ when you
What is the program which writes welcome to Nepal in a file?
To write "Welcome to Nepal" in a file, you can use a simple Python program. Here's an example: with open('welcome.txt', 'w') as file: file.write('Welcome to Nepal') This program opens a file named welcome.txt in write mode and writes the specified text to it. If the file does not exist, it will be created.
Can you open a file in read only mode?
All major operating systems allow developers to write code that can open a file in a variety of different ways, including "r" or "ro" (read-only) "rw" (read-write), "w" (write-only), and "a" (append, like "w" but starts at the end of the file, preserving the previous contents). In these operating systems, applications may choose to open a file as "read-only", which prevents accidental modification of the file by logic errors in the code.
