1. You (human) want to read an include file: use a text editor.
2. Your program wants to read a file: use open/fopen.
The include-directory is not set.
Hello Guys , Creating Notepad in C Langauge is too much easy . It's Just Fun...! #include<stdio.h> #include<conio.h> int main() { FILE *open; //use to open file pointer// //File_txt is created opn=fopen("C:\\filename.txt" ,"w") \\use "w" for creating a file// fclose(opn); getch(); }
FILE* file; file = fopen("some-file.dat");
You have to use the preprocessor directive fstream.h. #include <fstream.h> void main () { ifstream inDataStream;//the stream to open excess to a file inDataStrea.opem("fileName.txt");//to open an excess to the file fileName.txt (can be //any) if (inDataStream.fail())//check if the file was opened successfully { cout << "Couldn't open the file!"; } inDataStream << "Hello";// writing the word "Hello" in the file (can be any information) inDataStream.close();//close the opened excess to the file }
You can open any file with C, since it does not distinguish between file types. It's the way you read from the file.
fopen()
File/Open
#include <stdio.h> #include <ctype.h> ... int caps = 0; int c; file = fopen ("InputFile", "r"); while ((c = fgetc (file)) != EOF) { if (isupper (c)) ++caps; } fclose(file); ...
To write a C++ program that stores a friend's name in a file, you can use the <fstream> library. First, include the library and create an ofstream object to open a file for writing. Use the << operator to write the friend's name to the file, then close the file. Here's a simple example: #include <iostream> #include <fstream> using namespace std; int main() { ofstream outFile("friends.txt"); if (outFile.is_open()) { outFile << "Friend's Name\n"; // Replace with the actual name outFile.close(); } else { cout << "Unable to open file"; } return 0; }
To create a header file in Linux, you can use any text editor, such as nano, vim, or gedit. Simply open the editor and create a new file with a .h extension, for example, myheader.h. Inside the file, you can define function prototypes, macros, and include guards to prevent multiple inclusions. Save the file, and it will be ready for inclusion in your C or C++ source files using the #include directive.
If you want to copy C source code to a new file in MS Word, use the following steps:Open the C program in Notepad if it's not already open.Select all text (usually CTRL+A works fine).Copy that text to the clipboard (CTRL+C).Open MS Word (or Wordpad).CTRL+V to paste the C source code.Save if desired.If the C source code is in a file, and you have Windows Explorer open with that file showing, you can open MS Word, and then drag the file from Explorer to MS Word, which will open that file.
When you open a file in write mode, eg. fp=fopen("filename.txt","w"); the content of the file is deleted.