Error: unexpected end of file found?

sssalsa · #1 17-Feb-2005, 11:17

ive written a c++ program with my own function defined to compute the numer n less than m so that both n+a and n+b are also prime. so what i did was write a function triples(int m, int a, int b) to get c++ to find out the primes n, n+a and n+b, then my main int main() was to implement this. (this is how i was told i had to do this).at the end i only get 2 errors, they are as follows:

error C2601: 'main' : local function definitions are illegal
cpp(65) : fatal error C1004: unexpected end of file found
Error executing cl.exe.

17563c2.exe - 2 error(s), 0 warning(s)

the 1st is related to the first curly bracket underneath where i have written int main()
and the final error is for the very last curly bracket right at the end of the program. why are these errors ocuuring and how can i get rid of them?

this is my program (its quite long):

CPP / C++ / C Code:

#include <iostream.h>
#include <math.h>

int triples( int m, int a, int b )
{
int d, n;
double root, root1, root2;
if ((n<=1)) return 0;

else if (n==2) return 1;

else if (n>2 && n%2==0) return 0;

else

root = sqrt(n);
for (d=2; d<=root; d++){

if (0 == n%d) return 0; 

else if (((n+a)<=1)) return 0;
else if((n+a)==2) return 1;
else if ((n+a)>2 && (n+a)%2==0) return 0;

else

root1 = sqrt(n+a);
for (d=2; d<=root1; d++){

if (0 == (n+a)%d) return 0; 

else if (((n+b)<=1)) return 0;
else if ((n+b)==2) return 1;
else if ((n+b)>2 && (n+b)%2==0) return 0;

else

root2 = sqrt(n+b);
for (d=2; d<=root2; d++) {

if (0== (n+b)%d) {

return 0;
}
}

return 1;
}


int main ()
{
int a, b, m;
cout << "Enter intgers a, b and m: ";
cin >> a >> b >> m;

for (n=2; n<=m; n++)

if (triples(m, a, b))

cout << n << n+a << n+b << endl;

return 0;
}

machinated · #2 17-Feb-2005, 11:41

missing a closing brace in your triples function.

Dr. Evil · #3 17-Feb-2005, 11:43

Well, your first problem could very well be the fact that you have 5 open { brackets but only 3 close ones in your triples() function. Try something like this:

CPP / C++ / C Code:

#include <iostream.h>
#include <math.h>

int triples( int m, int a, int b )
{
	int d, n;
	double root, root1, root2;
	
	if ((n<=1)) return 0;
	else if (n==2) return 1;
	else if (n>2 && n%2==0) return 0;
	else root = sqrt(n);
	
	for (d=2; d<=root; d++)
	{
		
		if (0 == n%d) return 0;
		else if (((n+a)<=1)) return 0;
		else if((n+a)==2) return 1;
		else if ((n+a)>2 && (n+a)%2==0) return 0;
		else root1 = sqrt(n+a);
		
		for (d=2; d<=root1; d++)
		{
			if (0 == (n+a)%d) return 0;
			else if (((n+b)<=1)) return 0;
			else if ((n+b)==2) return 1;
			else if ((n+b)>2 && (n+b)%2==0) return 0;
			else root2 = sqrt(n+b);
			
			for (d=2; d<=root2; d++)
			{
				
				if (0== (n+b)%d)
				{
					
					return 0;
				}
			}
		}
	}
	return 1;
}

int main ()
{
	int a, b, m, n; //Note, you were also missing the variable 'n'

	cout << "Enter intgers a, b and m: ";
	cin >> a >> b >> m;
	
	for (n=2; n<=m; n++)
	
	if (triples(m, a, b))
	
	cout << n << n+a << n+b << endl;
	
	return 0;
}

EDIT: Oops, machinated beat me to it, oh well.

machinated · #4 17-Feb-2005, 12:01

haha yeah i didn't bother to go thru his code, just counted his braces

seasons · #5 13-Feb-2008, 12:16

Ok, now I have to ask the question that likely no one wants to think about.

What about when such an error is not caused by the brackets? In other words, I have some code (that I actually cannot show all of due to the grounds of this work), and have counted all the brackets for all the files, but there is no missing }. Yet I still get the error.

WaltP · #6 16-Feb-2008, 01:16

You know, you wouldn't have to count braces if you used proper and consistent formatting in your code.

davekw7x · #7 16-Feb-2008, 13:36

Quote:

Originally Posted by seasons

...no one wants to think about...

I don't mind thinking about it, but there is no way that anyone can solve your problem without seeing the code. (On the other hand, the point here is try to get you to the point where you can solve your problem, not to have someone else do it, right?)

Unexpected end-of-file can be caused by unmatched {} braces, unmatched [] brackets, unmatched () parentheses, unmatched " " double quotes, unmatched ' ' single quotes, missing semicolons, improperly formed if or for statements, and probably other things that don't just jump off of the top of my little pointed head at the moment. (Many of these might give other errors or warning messages, depending on context and depending on what compiler you are using, and the level of error reporting that is enabled. Does your compiler give any messages other than the one you posted?)

So: How big is your file? If it is really huge, then I have to ask whether you wrote (and wrote and wrote) all of that code without trying some compiles along the way. I personally wouldn't (ordinarily) put more than a few tens of lines of code into a new file without doing a test compile. I write the functions one at a time and at least compile them before going on to the next. Often I have a skeleton test program in place so that I can actually test the functionality incrementally. (But that's just me; not everyone works the same way.)

If you are really stuck, then here's a suggestion:

Start with a new (empty) file. Put your #include stuff and whatever function prototypes you need at the top, and then just add one function. Try a compile.

Add another function. Try a compile.

Etc.

Regards,

Dave

Peter_APIIT · #8 17-Feb-2008, 21:39

I agree with davekwx. His method of coding s the prereffe method for all programmer.

Besides that, u also can try to comment out some function and compile.

I hope this help.

maximuz · #9 21-Feb-2008, 21:37

hai Peter,

I have an opinion, to better use Switch statements and avoid more if statements, that may improve your code execution speed...

The problem you faced was with the missing braces...

regards...
Maxiiiiiii

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