C Exercises: Copy a file in another name

Last update on March 20 2025 12:32:53 (UTC/GMT +8 hours)

11. Copy File to Another Name

Write a program in C to copy a file to another name.

Assume that the content of the file test.txt is :                                                                       
test line 1                                                                                                   
test line 2                                                                                                   
test line 3                                                                                                   
test line 4

Sample Solution:

C Code:

#include <stdio.h>
#include <stdlib.h>

void main()
{
	FILE *fptr1, *fptr2;
	char ch, fname1[20], fname2[20];

	printf("\n\n Copy a file in another name :\n");
	printf("----------------------------------\n"); 

	printf(" Input the source file name : ");
	scanf("%s",fname1);

	fptr1=fopen(fname1, "r");
	if(fptr1==NULL)
	{
		printf(" File does not found or error in opening.!!");
		exit(1);
	}
	printf(" Input the new file name : ");
	scanf("%s",fname2);
	fptr2=fopen(fname2, "w");
	if(fptr2==NULL)
	{
		printf(" File does not found or error in opening.!!");
		fclose(fptr1);
		exit(2);
	}
	while(1)
	{
		ch=fgetc(fptr1);
		if(ch==EOF)
		{
			break;
		}
		else
		{
			fputc(ch, fptr2);
		}
	}
	printf(" The file %s  copied successfully in the file %s. \n\n",fname1,fname2);
	fclose(fptr1);
	fclose(fptr2);
	getchar();
}

Sample Output:

 Copy a file in another name :                                                                                
----------------------------------                                                                            
 Input the source file name : test.txt                                                                        
 Input the new file name : test1.txt                                                                          
 The file test.txt  copied successfully in the file test1.txt.

Flowchart:

For more Practice: Solve these Related Problems:

Write a C program to copy a binary file to a new file and verify the copy by comparing file sizes.
Write a C program to copy a file and replace every instance of a specific word during the copy.
Write a C program to implement a file copy function that reports the progress of the copying process.
Write a C program to copy a file and create a backup file with a timestamp appended to the name.

C Programming Code Editor:

Previous: Write a program in C to append multiple lines at the end of a text file.
Next: Write a program in C to merge two files and write it in a new file.