C Help On Ubuntu Latest...

[hissedar]

I have my essentials build and all other necessary to develop a k Means for a chosen dataset,

bu unfortunately can't even open the file my code is;

#include <stdio.h>

int main()

{
FILE *ret;
ret=fopen("~/CENG714/blok16_EO.txt" , "r");
if (ret=NULL);
(
printf("Didn't opened\n");
return 0;
)
}

when i say on terminal it gives me;

cc -c deneme.c:
deneme.c: In function ‘main’:
deneme.c:10: error: expected ‘)’ before ‘;’ token
deneme.c:13: error: expected ‘;’ before ‘}’ token
root:

I can not understand what the hell does that mean... what am i suppose to do please all help me...

Regards

[hissedar]

#include <stdio.h>

int main()

{
FILE *ret;
ret = fopen("blok16_EO.txt", "r");
if (ret= NULL){
printf("**** the world!\n");
return 0;
}
}

this one worked but did not give any kind of a answer like i did or did not...

is there a statement like " not = " so that i can check it?

regards

[darkrose0510]

Try something like this:

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

int main(int argc, char** argv)
{
	FILE *ret;
	char file[255];
	char* home = getenv("HOME");
	sprintf(file,"%s/CENG714/blok16_EO.txt",home);
	ret = fopen(file , "r");
	if (ret == NULL) {
		fprintf(stderr,"Didn't open\n");
		return 0;
	}else{
		printf("Opened\n");
	}
	fclose(ret);
	return 0;
}

Now compare that to your code, and spot the problems.

[hissedar]

Try something like this:

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

int main(int argc, char** argv)
{
	FILE *ret;
	char file[255];
	char* home = getenv("HOME");
	sprintf(file,"%s/CENG714/blok16_EO.txt",home);
	ret = fopen(file , "r");
	if (ret == NULL) {
		fprintf(stderr,"Didn't open\n");
		return 0;
	}else{
		printf("Opened\n");
	}
	fclose(ret);
	return 0;
}

Now compare that to your code, and spot the problems.

Thank you very much;

I have a lots of changes, can you write near to it which one means what?

so that i can learn from the process.

Regards

Thanks...

[darkrose0510]

Here you go, all commented up.

#include <stdio.h>
/* stdlib is needed for getenv() */
#include <stdlib.h>

int main(int argc, char** argv)
{
	/* file pointer */
	FILE *ret;
	/* file name */
	char file[255];
	/* get the users home directory */
	char* home = getenv("HOME");
	/* put the complete home/filename path into file variable */
	sprintf(file,"%s/CENG714/blok16_EO.txt",home);
	/* open the file */
	ret = fopen(file , "r");
	/* if ret is null the file didn't open */
	if (ret == NULL) {
		/* write a message to standard error */
		fprintf(stderr,"Didn't open\n");
		/* exit */
		return 0;
	}else{
		/* file opened successfully */
		printf("Opened\n");
	}
	/* close the file */
	fclose(ret);
	/* exit */
	return 0;
}

[Lakshmipathi]

if (ret=NULL);

It should be logical equal operator == not assignment operator =
If you use ; after if block - its considered as empty block - if evaluation is true.

google the term "c programming kernighan ritchie" should provide you C programming book for the beginners.

HTH

[hissedar]

Thank you guys for all the help;

can you guys tell me how to write a K means program in C, with respect to a dataset which is in text.

I am doing my best to write something, but short time, short learning.

Regards

[Rubberman]

Remember, classwork help is not allowed in the forums.

[hissedar]

Oh... !

ok, didn't know that sorry.

Regards

[Rubberman]

No problem. The best we can do for classwork type questions is to point you in a direction that will help you find the answers you need. After all, the purpose of class exercises is for you to learn how to do this stuff, and to learn how to find out where resources are that you can use without violating your school's ethical standards.