1. Programming

hi, I have made a small C program that make use of malloc and free for processing bitmap images. when i try to run the program, I am getting a error something like *** glibc detected *** free(): invalid next size (normal): 0x0000000000503e70 *** I am not sure of which free() is causing this... (1 Reply)

2. Programming

when i try to use the class i wrote, i either get this: *** glibc detected *** double free or corruption: 0x40236ff4 *** and the proccess exits with an error code of 0; or it segfaults. could someone look at my header file (with imp.) to give me some insight as to why its not working? ... (19 Replies)

3. Programming

I am using a structure defined as follows struct gene_square { double *x; double *y; };I have class, with a member function which is a pointer of this type: gene_square* m_Genes;I am allocating memory in the constructors like this: m_Genes = new gene_square; for (ii=0;... (1 Reply)

4. Programming

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( *ver == NULL ) { *ver = (vertex *) malloc(sizeof(vertex)); //this line ... (17 Replies)

5. Programming

Hi, I am having a hell of a time getting this to work. So basically, I have opened a popen to run a program that is going to prompt an action to occur half way through, when it gets to this I need to create a separate process and do some stuff, then return to the original process. This works... (0 Replies)

6. Programming

*** glibc detected *** ./a.out: malloc(): memory corruption (fast): Posted A minute ago M trying to make multiway tree and dont know what happend when this part of code get executed: 01void ins(NODE *ptr) 02{ 03 //working 04 if(ptr!=NULL) 05 { 06 SNODE *var=NULL; 07 var=(SNODE... (3 Replies)

7. Programming

Hi Friends, while executing the below code, am getting *** glibc detected *** ./ok: malloc(): memory corruption (fast) error, please suggest how to solve this issue. #include <stdio.h> #include <string.h> #include <sqlca.h> #include <alloca.h> /* Define constants for VARCHAR... (2 Replies)

8. Programming

Hello. I'm looking for a quite "interesting" bug I'm using fortran 90, compiler gfortran and the main idea is for every time step I build a bin structure for search contact between particles, for this at the begining TYPE :: circle_index INTEGER(kind = 4) :: ind_p TYPE(circle_index),... (1 Reply)

9. Programming

I am facing a problem of memory corruption. The loop runs for the first time but does not go through the second time. What could be the problem? for(int z=0;z<2;z++) { fp=fopen("poly.dat","r"); /*do something which reads this file into a 2D array*/ fclose(fp); ... (10 Replies)

10. Homework & Coursework Questions

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: I'm doing aproximation of derivative called five-point stencil. For every value of x, in interval , in step... (0 Replies)