I'm making a calculator using the command line and am using a stack to push the values of the arguments (digits of the calculator and operators), but I keep getting an invalid conversion from 'char*' to 'std::stack""value_type' and "no matching function for call to 'push(char*&)' error. Any ideas on what im doing wrong?
My code:
#include <iostream>
#include <cmath>
#include <stack>
int main(int argc,char* argv[])
{
std::stack<int> numbers;
// std::stack<char> operators;
for(int i=1;i<argc;++i)
{
numbers.push(argv[i]);
//operators.push(argv[i+1]);
}
while(!numbers.empty())
{
std::cout << numbers.top() << std::endl;
numbers.pop();
// std::cout << operators.top() << std::endl;
// operators.pop();
}
return 0;
I've tried using & and * and $ to try to call the values but I just don't think I'm getting something.
Related
The code is:
#include <iostream>
#include <opencv2/opencv.hpp>
int main (int argc, char** argv) {
auto path = "C:/Users/huhua/Pictures/11.jpg";
auto img = cv::imread(path);
if (img.empty()) {
std::cout << "is empty" << std::endl;
return 1;
}
cv::imshow("demo", img);
cv::waitKey(0);
return 0;
}
The 11.jpg exist. And if I use another 11.bmp. It works well.
After debug. The error is throw at libjpeg-trubo/src/jdatasr.c
fill_input_buffer(j_decompress_ptr cinfo)
{
my_src_ptr src = (my_src_ptr)cinfo->src;
size_t nbytes;
// error is throw at here
nbytes = JFREAD(src->infile, src->buffer, INPUT_BUF_SIZE);
// ...
}
Is my libjpeg issue??
How to fix this?
The 11.jpg image:
Update:
The OpenCV info
Update on 2021/10/19:
The reason is I set the cmake_toolchain_path after project(xxx). I should set the cmake_toolchain_path before project.
https://github.com/microsoft/vcpkg/discussions/20802
I am trying to convert a DICOM file into PLY format using VTK to further convert it into .pcd (point cloud format). I have followed the example provided here.
However in the above example the code is supposed to change .vtu format into .ply format. I changed the code to convert the .dcm format into .ply format as shown below. The build succeeded and the exe file is working as well, however, it does not write the required output file. Can anyone please point out where did I go wrong??
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkDICOMImageReader.h>
#include <vtkXMLPolyDataReader.h>
#include <vtkPLYWriter.h>
int main(int argc, char *argv[])
{
if(argc < 3)
{
std::cerr << "Required arguments: input.vtp output.ply" << std::endl;
return EXIT_FAILURE;
}
std::string inputFileName = argv[1];
std::string outputFileName = argv[2];
// Read the DICOM file in the specified directory.
vtkSmartPointer<vtkDICOMImageReader> reader =
vtkSmartPointer<vtkDICOMImageReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->Update();
vtkSmartPointer<vtkPLYWriter> writer = vtkSmartPointer<vtkPLYWriter>::New();
writer->SetFileName(outputFileName.c_str());
writer->SetInputConnection(reader->GetOutputPort());
writer->Update();
return EXIT_SUCCESS;
}
Below is an example of a simple contouring of a DICOM file and extraction of the largest connected area of polydata from the Marching Cubes filter then saved as a PLY format file. This should answer your question.
`
#include <vtkSmartPointer.h>
#include <vtkPolyData.h>
#include <vtkDICOMImageReader.h>
#include "vtkMarchingCubes.h"
#include "vtkPolyDataConnectivityFilter.h"
#include <vtkPLYWriter.h>
int main(int argc, char *argv[])
{
if(argc < 3)
{
std::cerr << "Required arguments: input.dcm output.ply" << std::endl;
return EXIT_FAILURE;
}
std::string inputFileName = argv[1];
std::string outputFileName = argv[2];
// Read the DICOM file in the specified directory.
vtkSmartPointer<vtkDICOMImageReader> reader =
vtkSmartPointer<vtkDICOMImageReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->Update();
//arb. threshold for bone based on CT Hounsfield Units
float isoValue = 400.0
vtkSmartPointer<vtkMarchingCubes> surface = vtkSmartPointer<vtkMarchingCubes>::New();
surface->SetInputConnection(reader->GetOutputPort());
surface->ComputeNormalsOn();
surface->SetValue(0, isoValue);
surface->Update()
// To remain largest region
vtkSmartPointer<vtkPolyDataConnectivityFilter> confilter =
vtkSmartPointer<vtkPolyDataConnectivityFilter>::New();
confilter->SetInputConnection(surface->GetOutputPort());
confilter->SetExtractionModeToLargestRegion();
confilter->Update();
vtkSmartPointer<vtkPLYWriter> writer = vtkSmartPointer<vtkPLYWriter>::New();
writer->SetFileName(outputFileName.c_str());
writer->SetInputConnection(confilter->GetOutputPort());
writer->Update();
return EXIT_SUCCESS;
}
i have a question regarding the binding of variables using the otl_stream.
No matter how i bind, using indexed or naming the order/naming does not affect which column is being updated. It seems always sequential.
You can see that in otl_stream the column-names have been switched. However
the postgres DB shows that both inserts yield equal results.
OS:Windows
OTL:4.0
Visual Studio 2013.
Platform: x64
ODBC: PostgreSQL ANSI(x64) 9.03.04.00
Any ideas?
Kind Regards Auke-Dirk
#include <iostream>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
using namespace std;
// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
#define OTL_ODBC_ALTERNATE_RPC
#if !defined(_WIN32) && !defined(_WIN64)
#define OTL_ODBC
#else
#define OTL_ODBC_POSTGRESQL // required with PG ODBC on Windows
#endif
#include "otlv4_h2\otlv4.h"
int _tmain(int argc, _TCHAR* argv[])
{
otl_connect db;
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("Driver=PostgreSQL ANSI;Server=localhost;Database=Horus;UID=postgres;PWD=12odsc7a");
otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table
db.commit();
otl_cursor::direct_exec
(
db,
"create table test_tab(f1 int, f2 int)"
); // create table
db.commit();
otl_stream ostr1(1, // no buffers
"insert into test_tab values(:f1<int>,:f2<int>)",
db
);
ostr1 << 1 << 2;
db.commit();
otl_stream ostr2(1, // no buffers
"insert into test_tab values(:f2<int>,:f1<int>)",
db
);
ostr2 << 1 << 2;
db.commit();
}
catch (otl_exception& p){ // intercept OTL exceptions
cerr << p.msg << endl; // print out error message
cerr << p.stm_text << endl; // print out SQL that caused the error
cerr << p.sqlstate << endl; // print out SQLSTATE message
cerr << p.var_info << endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from ODBC
return 0;
}
I Could not resolve this issue and therefor moved on to soci.
Regards
I know this question has been asked a number of times and I'm trying to implement their answers but its causing an exception in my code.
OS: Windows 7
OpenCV: 2.4.9
Here is my code:
#include "stdafx.h"
#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
using namespace cv;
using namespace std;
int main( int argc, char** argv )
{
VideoCapture cap(0); //capture the video from webcam
if ( !cap.isOpened() ) // if not success, exit program
{
cout << "Cannot open the web cam" << endl;
return -1;
}
Mat imgHSV;
_sleep(100); //give the camera a chance to wake up
while (true)
{
Mat imgOriginal;
bool success = cap.read(imgOriginal);
if (!success) //if not success, break loop
{
cout << "Cannot read a frame from video stream" << endl;
break;
}
cvtColor(imgOriginal, imgHSV, COLOR_BGR2HSV); //Convert the captured frame from BGR to HSV
vector<Mat> hsv_planes;
split( imgHSV, hsv_planes );
//hsv_planes[0] // H channel
//hsv_planes[1] // S channel
//hsv_planes[2] // V channel
imshow(thresholded_window, hsg_planes[2]); //show the S channel
if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
{
cout << "esc key is pressed by user" << endl;
break;
}
}
return 0;
}
Exception is thrown on the split line: "Unhandled exception at 0x62B978C9 (opencv_core249.dll) in TrackColour.exe: 0xC0000005: Access violation writing location 0xFEEEFEEE."
I figured out my problem, incase this happens to anyone else.
In VS I was doing a debug build but I was linking to the non debug versions of opencv. Notice in my error message opencv_core249, it should have been opencv_core249d (Note the 'd'). I updated my CV linking to use the debug libraries and it works.
The other opencv calls performed fine using the wrong libraries, something must be unique with split.
I run a program similar to the one in this question: https://stackoverflow.com/a/8719192/26070
#include <opencv/highgui.h>
#include <iostream>
/** #function main */
int main( int argc, char** argv )
{
cv::VideoCapture vcap;
cv::Mat image;
const std::string videoStreamAddress = "rtsp://192.0.0.1:8081/live.sdp";
//open the video stream and make sure it's opened
if(!vcap.open(videoStreamAddress)) {
std::cout << "Error opening video stream or file" << std::endl;
return -1;
}
for(;;) {
if(!vcap.read(image)) {
std::cout << "No frame" << std::endl;
cv::waitKey(500);
} else {
cv::imshow("Output Window", image);
}
if(cv::waitKey(1) >= 0) break;
}
}
The program runs fine for a certain amount of time (about one minute or so) and then the call to read() (method from cv::VideoCapture) always returns false.
The output is as follows:
[mpeg4 # 00da27a0] ac-tex damaged at 22 7
[mpeg4 # 00da27a0] Error at MB: 309
No frame
No frame
No frame
Note: the first two lines are not always present.
So, how can I determine what the root of the problem is?