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I didn't realize that string variable was destroyed after the function creating the thread returns. Now my DLL works great. Frankie, thank you so much.
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You're welcome.
If you have to start more threads with different strings, I suggest to allocate dynamic memory for each string to make it local for that thread. The thread can release the memory when it doesn't need it anymore.
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I want to covert following program into c++
subroutine gstep
common/blk1/u(3,800,800),fnl(3,800,800),gnl(3,800,800)
common/blk2/ni,nj,radi,rado,dt,cfl,lod,dto,wn,wl,lexp,dtot,ndiv,pi,phi
c in case a global time step is reqd. eg. time accurate problems
em=1.
ep=1.
c=1/sqrt(ep*em)
dt=10000.
cl=ar/diag
do i=1,ni
do j=4,nj-3
call grid(i,j,x1,y1,x2,y2,x3,y3,x4,y4,xp1,yp1,ar,c,0)
diag=0.5*(sqrt((x1-x3)**2+(y1-y3)**2)+sqrt((x2-x4)**2
* +(y2-y4)**2))
cl=ar/diag
dtemp=cfl*cl/(c)
if(dtemp.lt.dt)then
dt=dtemp
endif
enddo
enddo
wl=2*pi/wn
write(*,*) wn,wl,dt
ndiv=wl/(c*dt)
write(*,*) ndiv
ndiv=ndiv+1
dt=wl/(c*(ndiv))
write(*,*) ndiv,dt
return
end
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i have to calculate diagonal using grid points
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No, I mean what is the programming problem? Telling us what you want to do does not give enough information about where you are stuck or what you have tried. If you know the mathematics of the problem then converting that into C++ code should not be too difficult.
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I am writing cfd code taking reference of FORTRAN code following is the code which i had written but this program is not running
#include<math.h>
#include<fstream>
#include<iomanip>
//#include "constant1.h"
using namespace std;
float radi=11,rado=59.99,dro;
float r=11,spar=0.9415,pi=3.141592654,cfl=0.50,wn=2*pi*0.6/radi;
int i=1,ni=200,nj=50,nth=ni,nrad=nj,ncon1=0,ncon2=0,ncon=1000,lod=3,lexp=2,eps=0;
//float wn;
static int j=1;
class project
{
public:
float x,y,r,th;
void grid()
{
fstream infile("grid11.dat",ios::out);
for(r=11;r<=60;r++)
{
for(th=0; th<=2*pi; th=th+((pi/100)+(.00025*pi/98)))
{
cout<
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Nileshb111 wrote: but this program is not running Once again you are expecting us to guess what is happening; we cannot see your screen or read your mind. Please edit your message, add <pre> tags around your code to make it readable, and explain exactly what the problem is and where it occurs.
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I wanted to calculate outgoing flux on 2D circular grid. So first part of this code is for to get grid point after that i initializes variables on those grid points, now i want to calculate diagonal to get unit normal through it .
above code running upto global time step
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please can u help me to solve posted problem
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Not without some proper detail of the code you have written, what it is supposed to do, and what errors you receive.
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Can u give a c++ code to calculate flux over 2D grids please
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Nileshb111 wrote: Can u give a c++ code to calculate flux over 2D grids please Sorry, no, particularly as I have no idea what you mean by "calculate flux over 2D grids".
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I am using WMI services to get drive info.
I am able to get all except blocksize of drive. I am getting incorrect value.
Code:
VariantClear(&vtProp);
hr = ptrclsObj->Get(L"BlockSize", 0, &vtProp, 0, 0);
INT BlockSize;
if ( FAILED(hr) == FALSE)
BlockSize = vtProp.intVal;;
Please guide.
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john5632 wrote: I am getting incorrect value. What value, and what do you expect to be getting? What is ptrclsObj actually pointing at?
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OpenCV application need env. Var. Is it mandatory to use env var for open cv. without using env var can i deploy my application. Because in client side i dont have permission for adding env var.
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You already posted this (three times) in your question in Q&A, and received two answers. Please do not repost.
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Hey guys, I am kind of new with C++. I have an assignment to do which is similar to this one:
http://uenics.evansville.edu/~hwang/f07-courses/cs215/project2.html
My problems are how to read I/O files and how to actually DO this program. I am really lost with it.
Thanks
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From the linked page:
Reminder: Programming Projects (as opposed to Homework problems) are to be your own work. See syllabus for definitions of acceptable assistance from others.
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This is not my homework, as u can see this link is from 2007. That is why I posted instead of my homework. I need assistance, so I will be able to solve my homework. If you can post something/link that may help me I will appreciate. Otherwise thank you, but I do know about my responsibilities as a student.
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Well, you could be more specific, then.
For instance, you may use a ifstream object for reading from the file both the grid size and the grid itself, now what are your troubles with it?
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Is this your first assignment?
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles
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Yes, and before this I just knew how to calculate areas and those things using C++. So, it is a huge difference hahaha
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