Thread: hmm, question!

I wrote this K-Journal program out of complete boredom, when I compile it under C++ Specs it works, when I compile under C it does not work, can someone explain why and if possible explain what I should do so I can compile it under C

Code:

/*
 * k-journal.c
 * A console based Journal
 
    Copyright (C) 2002  Lucas Campbell

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */
#include <stdio.h>
#include <string.h>
#include <time.h>

int main()
{
	char str[9999], retime[25];
	time_t tp;
	tp = time(NULL);
	printf("	 _       _\n");
	printf("	| |    / /\n");
	printf("	| |   / /\n");
	printf("	| |  / /\n");
	printf("	| | / /\n");
	printf("	|  ^ /    JOURNAL\n");
	printf("	| |^ \\\n");
	printf("	| |  \\ \\\n");
	printf("	| |    \\ \\\n");
	printf("	|_|     \\_\\\n");
	printf("+---------------------------+\n");
	printf("Enter your text: ");
	FILE *fp = fopen("k-journal.txt","a");
	gets(str);
	if(!strcmp("l",str))
		fprintf(fp,"Blank (l)");
	else
		fprintf(fp,str);
	fprintf(fp,"\n");
	strcpy(retime,ctime(&tp));
	fprintf(fp,retime);
	printf("%s\n\n ",retime);
	fclose(fp);
	return 0;
}

Code:

/*
 * k-journal.c
 * A console based Journal
 
    Copyright (C) 2002  Lucas Campbell

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */
#include <stdio.h>
#include <string.h>
#include <time.h>

int main()
{
	char str[9999], retime[25];
	time_t tp;
	FILE *fp;
	tp = time(NULL);
	printf("	 _       _\n");
	printf("	| |    / /\n");
	printf("	| |   / /\n");
	printf("	| |  / /\n");
	printf("	| | / /\n");
	printf("	|  ^ /    JOURNAL\n");
	printf("	| |^ \\\n");
	printf("	| |  \\ \\\n");
	printf("	| |    \\ \\\n");
	printf("	|_|     \\_\\\n");
	printf("+---------------------------+\n");
	printf("Enter your text: ");
	fp = fopen("k-journal.txt","a");
	gets(str);
	if(!strcmp("l",str))
		fprintf(fp,"Blank (l)");
	else
		fprintf(fp,str);
	fprintf(fp,"\n");
	strcpy(retime,ctime(&tp));
	fprintf(fp,retime);
	printf("%s\n\n ",retime);
	fclose(fp);
	return 0;
}

This works. It was your file pointer. I think...

File *fp; first

THEN..

fp = fopen....

That could be one reason.

Explanation:
File pointer assignments always come first. Later on, you use the actual pointer to do file work.

Beinning of code:
FILE * MyFileToUse;

Later on in code:
MyFileToUse = fopen("c:\\foo.txt", "attributes");
fprintf(MyFileToUse, "blahblahblah\n");
fclose(MyFileToUse);

- edit -
In c++ you can assign them anywhere. In C you have to put them at the beginning of your function. I learned that the hard way.

thanks!