C File Handling
File handling is an essential aspect for reading from and writing to files.
The standard I/O (<stdio.h>) library provides functions for file operations.
Get a detailed use of functions and its uses below;
The standard I/O (<stdio.h>) library provides functions for file operations.
Get a detailed use of functions and its uses below;
Operation
Function
Description
Opening a File
fopen
Opens a file for specified operations (r, w, a, etc.)
Reading from a File
fscanf, fgetc
Reads data from a file using specified formats or characters
Writing to a File
fprintf, fputc
Writes data to a file using specified formats or characters
Reading Characters
fgetc
Reads a single character from a file
Writing Characters
fputc
Writes a single character to a file
Reading Strings
fscanf, fgets
Reads strings from a file using specified formats or lines
Writing Strings
fprintf, fputs
Writes strings to a file using specified formats or lines
Checking for EOF
feof
Checks if the end of file has been reached
Closing a File
fclose
Closes a previously opened file
Example
#include <stdio.h>
int main() {
FILE *fptr; // File pointer
char text[100]; // Buffer for reading/writing
// Opening a file for writing
fptr = fopen("example.txt", "w");
if (fptr == NULL) {
printf("Error opening the file for writing.\n");
return 1; // Return an error code
}
// Writing to the file
fprintf(fptr, "Hello, World!\n");
fprintf(fptr, "This is a C file handling example.");
// Closing the file after writing
fclose(fptr);
// Opening the same file for reading
fptr = fopen("example.txt", "r");
if (fptr == NULL) {
printf("Error opening the file for reading.\n");
return 1; // Return an error code
}
// Reading from the file and printing to the console
printf("Content of the file:\n");
while (fgets(text, sizeof(text), fptr) != NULL) {
printf("%s", text);
}
// Closing the file after reading
fclose(fptr);
return 0; // Return success code
}
Quick Recap
Topics Covered
C File Handling
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Example 1
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