Let’s discuss the question: how to delete specific line from text file using c#. We summarize all relevant answers in section Q&A of website Achievetampabay.org in category: Blog Finance. See more related questions in the comments below.
How do I delete a specific line from text file in C?
- #include<stdio.h>
- int main(){
- FILE *fptr1, *fptr2;
- char file1[] =”file1.txt”;
- char file2[] =”file2.txt”;
- char curr;
- int del, line_number = 0;
- printf(“Please enter the line number you want to delete : “);
How do you delete a specific line in a file?
- Open the file in read mode.
- Read the files contents.
- Open the file in write mode.
- Use a for loop to read each line and write it to the file.
- When we reach the line we want to delete, skip it.
Delete A Specific Line From A File | C Programming Example
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How do I delete a line of code?
Hitting CTRL+D deletes the lines completely (not just the selection) without leaving any unwanted blank lines.
How do you delete a specific line in a file in C++?
open(“temp. txt”); cout << “Which line do you want to remove? “; cin >> deleteline; while (getline(fin,line)) { if (line != deleteline) { temp << line << endl; } } temp.
How does Fgets work in C?
C library function – fgets()
The C library function char *fgets(char *str, int n, FILE *stream) reads a line from the specified stream and stores it into the string pointed to by str. It stops when either (n-1) characters are read, the newline character is read, or the end-of-file is reached, whichever comes first.
What is Fseek in C?
The C library function fseek() sets the file position of the stream to a given offset. The pointer associated with the file is moved to that offset.
How do you delete a specific line in a file bash?
To delete a line, we’ll use the sed “d” command. Note that you have to declare which line to delete. Otherwise, sed will delete all the lines.
How do I delete a specific line in vi editor?
- Press the Esc key to go to normal mode.
- Place the cursor on the line you want to delete.
- Type dd and hit Enter to remove the line.
How do you delete a line in terminal?
…
How do I clear the current command line in terminal?
| Hotkeys | Description |
|---|---|
| CTRL + w | Delete a word. |
| CTRL + c | Abort what you are typing. |
| CTRL + d | Delete current character. |
How do I delete an entire line in Intellij?
Delete current line
One way to delete a line is to select the whole line and press N/A , but a more efficient way would be to press Ctrl+L when the cursor is anywhere in that line.
How do you delete a whole line in VSCode?
- Windows: Ctrl + x.
- Mac: Cmd + x.
- Linux: Ctrl + x.
How do I delete a row in Intellij?
- Select a row or rows. To select multiple rows, click numbers in the gutter. Also, you can press Ctrl and click the necessary rows.
- Click the Delete Row icon ( ) on the toolbar. Alternatively, press Ctrl+Y or Delete .
program in C to delete a specific line from a file
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How do you overwrite a text file in C++?
- Define “save the changes to the current file”. …
- a safer method is to write a new file (copying from the original if you like), then close them both, swap them, and delete the old one. …
- Using ofstream with the “current file” name as parameter for the constructor will overwrite it.
How do you clear the last line in C++?
Using the ‘\r’ modifier, instead of endl; on my cout << (temp) << “%” << endl; deletes the current line as soon as it writes to it, and overwrites it with the next number.
How do you update a line in a file in C++?
- Create the new file.
- Copy the old file to the new file up to the start of the “line” you want to change.
- Write the “new” line to the new file.
- Skip the “old” line in the old file.
- Copy the remainder of the old file to the new file.
- Close both old and new files.
What is fgets and Fputs in C?
fgets() and fputs() functions In C Language. fgets() function reads string from a file pointed by file pointer. It also copies the string to a memory location referred by an array. fputs() function is useful when we want to write a string into the opened file .
What is the difference between fscanf and fgets?
fgets reads to a newline. fscanf only reads up to whitespace.
What is the difference between fgets and gets in C?
gets() keeps reading input until newline character or end-of-file(EOF) shows up. This can lead to buffer overflow as it doesn’t check array bounds of variable. While in case of fgets() it will also stop when maximum limit of input characters is reached.
What is fread and fwrite in C?
The functions fread/fwrite are used for reading/writing data from/to the file opened by fopen function. These functions accept three arguments. The first argument is a pointer to buffer used for reading/writing the data. The data read/written is in the form of ‘nmemb’ elements each ‘size’ bytes long.
What does Ftell () do in C?
In C language, ftell() returns the current file position of the specified stream with respect to the starting of the file. This function is used to get the total size of file after moving the file pointer at the end of the file.
What is offset in C?
Description. The C library macro offsetof(type, member-designator) results in a constant integer of type size_t which is the offset in bytes of a structure member from the beginning of the structure. The member is given by member-designator, and the name of the structure is given in type.
How do you delete a specific line from a text file in Java?
…
There is no magic to removing lines.
- Copy the file line by line, without the line you don’t want.
- Delete the original file.
- rename the copy as the original file.
Replace A Specific Line In A File | C Programming Example
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How do you delete one line from a text file in Linux?
You can use the “stream editor for filtering and transforming text” sed. Here, -i means edit the file inplace. d is the command to “delete the pattern space; immediately start next cycle”.
How do you remove a specific line from a file in Python?
- a_file = open(“sample.txt”, “r”) get list of lines.
- lines = a_file. readlines()
- a_file. close()
- new_file = open(“sample.txt”, “w”)
- for line in lines:
- if line. strip(“\n”) != “line2”: Delete “line2” from new_file.
- new_file. write(line)
- new_file. close()
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