How do you delete a specific line in a file C?

Delete from a text file using C

1. #include
2. int main(){
3. FILE *fptr1, *fptr2;
4. char file1[] =”file1.txt”;
5. char file2[] =”file2.txt”;
6. char curr;
7. int del, line_number = 0;
8. printf(“Please enter the line number you want to delete : “);

How do I delete a single line in a text file?

The best way to do this is to open the file in text mode, read each line with ReadLine(), and then write it to a new file with WriteLine(), skipping the one line you want to delete.

How do you use Delete?

Delete is an operator that is used to destroy array and non-array(pointer) objects which are created by new expression.

1. Delete can be used by either using Delete operator or Delete [ ] operator.
2. New operator is used for dynamic memory allocation which puts variables on heap memory.

How do you delete a line in a Jupyter notebook?

9 Answers. If you are talking about deleting the empty line from jupyter notebook which opens in web browser then press Esc and D(keyboard key) 2 times. by clicking on the help and then from dropdown on keyboard shortcuts. Pressing Esc and D (2 times) will delete only blank lines starting from the beginning.

How do I remove a line that contains a specific string in Python?

Using a Number to Delete a Line

1. Open the file in read mode.
2. Read the files contents.
3. Open the file in write mode.
4. Use a for loop to read each line and write it to the file.
5. When we reach the line we want to delete, skip it.

How do you overwrite a line in a file C++?

To replace the last two lines in your file:

1. Use fopen() to open the file.
2. Get the current file position with fgetpos()
3. Store always the last two file position and read line by line.
4. When you’ve reached the end of the file: The lower position is where you have to position to with fseek()

How do you remove the last line of a file in C++?

3 Answers

1. Open file.
2. Position the read pointer at the end-chunkSize.
3. Read chunkSize bytes of data.
4. If there is a line break, store the position, else return to 3.
5. Copy the contents from the start to position.

What is editing in C?

Edit: Use an editor to develop the code in your programming language of choice. Result: a text file with the source code of the program (e.g. hello. c) Compile: Use a compiler to translate the source code into a version understood by the machine.

What is binary file in C?

Binary files are very similar to arrays of structures, except the structures are in a disk file rather than in an array in memory. You can jump instantly to any structure in the file, which provides random access as in an array. You can change the contents of a structure anywhere in the file at any time.