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The file is large. I remove some parts which are not related but the array troube changes although still exists.

I will first try to deal with it with the methods recommended by the below window
...

Here, dataset is an array of pointers to sequence. It is desctructed by the call to make_vertex.

Can we use some technique to protect this array(data)?

I change make_vertex as you showed. It appears to work well. But dataset is destructed. This also gives troubles since it is what the code works on

dataset[4] has a different address after a call...

Add return statement and change return type and it can work.

But it still fails after generating many vertices. Notice where failure occurs

This seems to be a general problem.

Thanks for all...

I tried this:

vertex *root;
make_vertex(&root, -1, 0, -1);

(gdb) p root
$1 = (vertex *) 0x0
(gdb) p *root
Cannot access memory at address 0x0

What's wrong?

where and how should this be done? Would you please give an example?

Thanks

Linux 3.2.3-59



struct vertex {
int id;
int seq;
int pos;
int clique;
int numOfVer;
int numOfPrev;
int numOfNext;
int...

does not make effect. should generate many vertices for a graph. but it will fail after 20 vertices.

can generate 20 vertices. after then, it fails. can't figure out.

there seems not to be error in this segment. In some computers, it can work well. But in others, it will give a failure.

why it ocurrs and how to deal with it?


in a function:

if(...

Sigh!! What an error!! But the two characters are the same in this shell.

Thanks

gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-59)

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>
#include <string.h>
#include <stdarg.h>

thanks

Thanks

compile-time error.

for example:

int d (char *str1, char *str2, int n1, int n2, int len) {


if (strlen(str1) < n1+1en-1 || strlen(str2) < n2+len-1) { // Error ? ...

A conditional statement cause it:

if(strlen(str) < n1+1) {

-------

}

LD_LIBRARY_PATH can work. But it is useful to remind that the library may be corrupted or incompatible
Thanks

Is there any solution else? I am advised to avoid LD_LIBRARY_PATH. Can other methods be available?

Thanks

It is found in /usr/lib/, compiled but can not run

% gcc -g -o stand stand.c -I/usr/lib/ -lRmath -lm
% ./stand
./stand: error while loading shared libraries: libRmath.so: cannot open shared...

% locate Rmath
/m/backup/backup/lib/R/include/Rmath.h
/usr/lib/R/include/Rmath.h
% gcc -g -o stand stand.c -I/usr/lib/R/include/ -lRmath -lm
% ./stand
./stand: error while loading shared...

(gdb) r --------------------- enter

Breakpoint 1, 0x0000000000409d40 in main ()
(gdb) n
Single stepping until exit from function main,
which has no line number information.
Find_Cmd_Option:...

Thanks. I can understand. Let me first try to fix it.

They are pointers. This is sure. But there is some mistakes in the code I gave before. The assignment should use * before the pointers. I am sorry for carelessness when posted. But when checking with...

Right!! these are pointers. What does 'out of bounds' mean? More important, how to avoid it? Clearly null checking can not make effect in this respect.

Program received signal SIGSEGV,...

Let me show it here:

node->is_done = (int *) malloc(sizeof(int));
node->hood = (double *) malloc(sizeof(double));
node->c...

After allocating memory for some variables, segfault is often to happen, due to the same reason: Address 0x1cd00000103 out of bounds

It is welcome to recommend some treatments. Thanks

e.g.
...

You are right. I check the code and finally find that the error is from an assignment. but it is still strange.

list[size-2]->left = list[size-1];

the result is: list[size-2] = list[size-1];
...

When allocating memory for two different nodes, the resulting memory are the same. Clearly, this will lead to a mistake. This happened in a function. And the process must be in a function.

(gdb) p...