programing c lagnguvage

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C

how to connent to the logfile with c project in pc?

Posted 28-Nov-11 16:25pm

Kunal prajapati

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enhzflep 28-Nov-11 22:31pm

FILE *logFile;
char *logFileName = "logfile.log";
char *accessPermissions = "a+";
logFile = fopen(logFileName, acessPermissions);

[no name] 28-Nov-11 22:34pm

Please clarify your question. We could not understand.

Albert Holguin 28-Nov-11 22:56pm

If you haven't caught on... No such thing as "the logfile", although you can make a file and call it a log file (or whatever you want).

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Selva K · Answer 1 · 2011-11-28T16:49:00

Solution 1

C#

#define MAX 50;
FILE *logFile;
char logFileName[MAX] = "logfile.log";
char accessPermissions[MAX] = "a+";
logFile = fopen(logFileName, acessPermissions);

Use

C++

fwrite();

method to write to the file

Posted 28-Nov-11 16:49pm

Selva K

v2

Comments

enhzflep 28-Nov-11 22:57pm

Gawd almighty! Why would one write to a text file using fwrite? That's unpleasant on a good day for text stuffs.

Simply use fprintf and be done with it - unless of course, you also use fwrite to put text on the screen via the stdout file handle!

Sergey Alexandrovich Kryukov 28-Nov-11 23:09pm

You are right :-)
--SA

Selva K 28-Nov-11 23:19pm

why we should not use fwrite(), what is the difference ?
sorry for using that.

enhzflep 28-Nov-11 23:53pm

While it's perfectly legal to use fwrite, it's rather inconvenient and doesn't do any text formatting for you. To do that, you'd have to use sprintf to put it into a string before then using fwrite to write that string. MUCH easier to simply use fprintf.

E.g -
FILE *fp;
char *fileName = "logFile.log";
char permissions = "a+";
int i;

fp = fopen(fileName, permissions);

// method 1 - using fprintf
for (i=0; i<10; i++)
fprintf(fp, "This is line %d\n", i);

// method 2 - using fwrite
char lineBuffer[256]; // hope it's large enough!
for (i=0; i<10; i++)
{
sprintf(lineBuffer, "This is line %d\n", i);
fwrite(lineBuffer, 1, strlen(lineBuffer), fp);
}

Selva K 29-Nov-11 1:29am

Thank you...