I try to run code in vscode but I got #include error...
#include <iostream>
using namespace std;
int main()
{
cout << "Hola!!"
}
Related
I'm testing an antidebug solution with ptrace method; and i compile the program by using ndk21e cross-compile.
The problem is that it compiles successfully with gcc, but fails with ndk cross-compile.
ndk cross-compile compiles all other programs without problems
#include <stdlib.h>
#include <stdio.h>
#include<sys/ptrace.h>
#include <dlfcn.h>
#include <string.h>
int main(int argc, char **argv) {
void *handle;
long (*go)(enum __ptrace_request request, pid_t pid);
// get a handle to the library that contains 'ptrace'
handle = dlopen ("/lib/x86_64-linux-gnu/libc.so.6", RTLD_LAZY);
// reference to the dynamically-resolved function 'ptrace'
go = dlsym(handle, "ptrace");
if (go(PTRACE_TRACEME, 0) < 0) {
puts("being traced");
exit(1);
}
puts("not being traced");
// cleanup
dlclose(handle);
return 0;
}
And it shows the error like the picture as follow：
gcc compileresult and cross-compile error result
How can i solve this problem. Thanks.
I am using embedded system and I'm testing transparent QWS server where is my Qt4.7.3.
I faced the afterimage in the QDialog when moving cursor in test program which as the QWS client, but it didn't happen in the QMainWindow which in QWS server program.
Can anyone help me to fix the issue?
There is the issue
Here is test program source code.
#include "mainwindow.h"
#include <QApplication>
#include<QWSServer>
#include <QDialog>
#include <fcntl.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <linux/fb.h>
#include "qscreenlinuxfb_qws.h"
#include "qscreendriverfactory_qws.h"
#include <errno.h>
extern "C" {
extern int Test();
}
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QDialog w;
QWSServer::setBackground(QColor(0,0,0,0));
QWSServer::setCursorVisible(false);
w.setStyleSheet("background-color:transparent;");
w.show();
return a.exec();
}
OK I found the issue. In QT source code.
src\gui\embedded\qscreen_qws.cpp
if (!blendSize.isNull()) {
*blendbuffer = new QImage(blendSize, d_ptr->preferredImageFormat());
}
to
if (!blendSize.isNull()) {
*blendbuffer = new QImage(blendSize, d_ptr->preferredImageFormat());
QPixmap temp = QPixmap(blendSize);
temp.fill(Qt::transparent);
**blendbuffer = temp.toImage();
}
I'm using Code::Blocks 16.01 on Windows 10.
I need to convert a string to an integer.
So I'm trying to use stoi, but it says it's not declared.
I have enabled -std=c++11 in compiler settings but it still gives me an error:
'stoi' was not declared in this scope
Screenshot of Code::Blocks:
The part of the code which causes the error is:
#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <fstream>
#include <string>
#include <sstream>
using namespace std;
int main() {
int n,m,k;
string nmk;
ifstream test("input00.txt");
if (test.is_open())
{
getline (test,nmk,' ');
n = stoi (nmk,NULL,10);
getline (test,nmk,' ');
m = stoi (nmk,NULL,10);
getline (test,nmk, '\n');
k = stoi (nmk,NULL,10);
}
}
I have found a strange behavior (probably an issue) while trying to compile a simple application with MS VC 15.3.1 (after applying VC 2017 Upgrade 3):
#include <iostream>
#include <algorithm>
#include <string>
// compiles if commenting out the line below
#include <vector>
#include <list>
class A
{
std::string s;
public:
A(const std::string& str) : s(str)
{
}
A(A&& other)
{
// compiles if changing std::swap<std::string>() to std::swap()
std::swap<std::string>(s, other.s);
}
};
int main(int argc, char *argv[])
{
return 0;
}
the compiler emits error :
1>d:\program files (x86)\microsoft visual studio\2017\enterprise\vc\tools\msvc\14.11.25503\include\vector(2131):
error C2039: '_Alloc': is not a member of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>'
This code compiles without any issues with VC 15.2, VS2015 and VS2013 toolsets.
Help, I'm using VC++ and I always get the LNK2005 and LNK1169 Error when running my script, can you guys please tell me why it's happening and how to fix it, Thank you!
Code:
In the Main.cpp
#include "stdafx.h
#include <Windows.h>
#include <stdio.h>
#include <stdlib.h>
#include "Modifier.h"
using namespace std;
HWND myconsole = GetConsoleWindow();
HDC mydc = GetDC(myconsole);
int main()
{
if (Input.beg("Hello"))
{
cout << "World";
}
cin.ignore();
}
In "Modifier.cpp"
#include "stdafx.h"
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
struct {
bool beg(string a)
{
string b;
getline(cin, b);
if (b == a)
{
return true;
}
else
{
}
}
} Input;
In "Modifier.h"
#include "Modifier.cpp"
You must change your header declaration: you're inadvertently declaring a different, global "Input" variable in every .cpp that includes "Modifier.h".
SUGGESTION:
// Modifier.h
#ifndef MODIFER_H
#define MODIFIER_H
struct Input {
bool beg(string a)
{
string b;
getline(cin, b);
if (b == a)
{
return true;
}
else
{
}
}
};
#endif
Then, in Modifier.cpp:
#include "Modifier.h"
struct Input globalInput;
You should not include a .cpp in a .h. You should include headers in source files, not vice versa.
And you should definitely consider using a "class" instead of a "struct". Because, frankly, that's what your "Input" is: just a method, no state/no data.