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can't copy existing file into new file

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Join Date: Jan 2009

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nitu_thakkar nitu_thakkar is offline

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can't copy existing file into new file

-1

Jan 5th, 2009

this coding is about copy one existing file into other file

but it can't do so throught the command line arg. what is

the solution....?

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
               #include<stdio.h>
 
	#include<conio.h>
 
	#include<stdlib.h>
 
	void main(char *argv[])
	{
 
		FILE *fp1,*fp2;
		char c;
		int i;
 
		clrscr();
 
		fp1=fopen(argv[1],"r");
 
		rewind(fp1);
 
		fp2=fopen(argv[2],"w");
 
		if(fp1==NULL)
		{
 
			printf("Source File is Not Exist");
			exit(0);
 
		}
 
		while((c=getc(fp1))!=EOF)
		{
 
			putc(c,fp2);
 
			printf("%c",c);
 
		}
 
		fclose(fp1);
 
		fclose(fp2);
 
	getch();
 
	}
               #include<stdio.h>

	#include<conio.h>

	#include<stdlib.h>

	void main(char *argv[])
	{

		FILE *fp1,*fp2;
		char c;
		int i;

		clrscr();

		fp1=fopen(argv[1],"r");

		rewind(fp1);

		fp2=fopen(argv[2],"w");

		if(fp1==NULL)
		{

			printf("Source File is Not Exist");
			exit(0);

		}

		while((c=getc(fp1))!=EOF)
		{

			putc(c,fp2);

			printf("%c",c);

		}

		fclose(fp1);

		fclose(fp2);

	getch();

	}

Last edited by Ancient Dragon; Jan 5th, 2009 at 9:39 pm. Reason: add code tags

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Re: can't copy existing file into new file

Jan 5th, 2009

1. Wrong main prototype. Must be:

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
int main(int argc, char*argv[])
int main(int argc, char*argv[])

2. fgetc returns int, declare c as int.
3. No need in rewind(fp1). Test fp1 == 0 befory any ops with opened file.
4. Test argc == 3 (argv[0] - program name, argv[1] and argv[2] - file names).
5. You can't copy binary file in text mode. To open in binary mode use "rb" and "wb" open mode arguments.

Last edited by ArkM; Jan 5th, 2009 at 7:01 pm.

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Re: can't copy existing file into new file

Jan 6th, 2009

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Originally Posted by ArkM

1. Wrong main prototype. Must be:
Help with Code Tags

c Syntax (Toggle Plain Text)
int main(int argc, char*argv[])
int main(int argc, char*argv[])
2. fgetc returns int, declare c as int.
3. No need in rewind(fp1). Test fp1 == 0 befory any ops with opened file.
4. Test argc == 3 (argv[0] - program name, argv[1] and argv[2] - file names).
5. You can't copy binary file in text mode. To open in binary mode use "rb" and "wb" open mode arguments.

i have tried it but there is no change i got the same massage

here, getc() function used for get the value from existing file ,

character by character & put into new file

( which is given during run time )

character by character

can u pls send me more detail....?

Last edited by nitu_thakkar; Jan 6th, 2009 at 1:28 pm.

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Re: can't copy existing file into new file

Jan 6th, 2009

>>i have tried it but there is no change i got the same massage
What error message -- you never said what that was. Post code and make sure main() is declared like ArkM posted.

Post code if you need more help. And if you are trying to copy binary files then you have to open the files in binary mode, also as previously suggested.

Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.