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C program to copy the contents of one file to another file?
C Files I/O − Create, Open, Read, Write and Close a File
C File management
A File can be used to store a large volume of persistent data. Like many other languages 'C' provides the following file management functions,
- Creation of a file
- Opening a file
- Reading a file
- Writing to a file
- Closing a file
Following are the most important file management functions available in 'C,'
| function | purpose |
|---|---|
| fopen () | Creating a file or opening an existing file |
| fclose () | Closing a file |
| fprintf () | Writing a block of data to a file |
| fscanf () | Reading a block data from a file |
| getc () | Reads a single character from a file |
| putc () | Writes a single character to a file |
| getw () | Reads an integer from a file |
| putw () | Writing an integer to a file |
| fseek () | Sets the position of a file pointer to a specified location |
| ftell () | Returns the current position of a file pointer |
| rewind () | Sets the file pointer at the beginning of a file |
Input: sourcefile = x1.txt targefile = x2.txt Output: File copied successfully.
Explanation
In this program we will copy a file to another file, firstly you will specify a file to copy. We will open the file and then read the file that we wish to copy in "read" mode and target file in "write" mode.
Example
#include <iostream>
#include <stdlib.h>
using namespace std;
int main() {
char ch;// source_file[20], target_file[20];
FILE *source, *target;
char source_file[]="x1.txt";
char target_file[]="x2.txt";
source = fopen(source_file, "r");
if (source == NULL) {
printf("Press any key to exit...
");
exit(EXIT_FAILURE);
}
target = fopen(target_file, "w");
if (target == NULL) {
fclose(source);
printf("Press any key to exit...
");
exit(EXIT_FAILURE);
}
while ((ch = fgetc(source)) != EOF)
fputc(ch, target);
printf("File copied successfully.
");
fclose(source);
fclose(target);
return 0;
}
Updated on: 01-Nov-2023
35K+ Views
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