The forward declaration does not work as expected in MQL

I've 4 classes across 4 different files in the following hierarchy: |-- Terminal (Chart) | |-- Chart (Draw, Market) | | |-- Draw | | |-- Market In the brackets are class pointers which class implements as class variables. So Draw and Market classes e

Why is this addition silently ignored?

I have the following C code: #include <stdint.h> #include <stdio.h> int i; uint64_t a[] = { (uint64_t)&i, (uint64_t)&i + 0x8000000000000000 }; int main() { printf("%p %llx %llx\n", &i, a[0], a[1]); } If I compile this (as

java.lang.IllegalStateException: endPosTable already defined

Trying to build an alexa (amazon:echo) skills set. At the same time, trying to use this experience as a learning testbed for dependency injection through dagger 2. However, building the package using maven-2 cmd: mvn assembly:assembly -DdescriptorId=

Error C saying that the expression is not assignable?

So I'm writing a program that takes a string input of three colors of a resistor band and calculates it's resistance. I've taken the input, and this function uses strcmp (or strcasecmp) to compare the string with a list of colors. However, I am getti

Java error - array required, but java.lang.String found

I've been working on this problem for a while and managed to get rid of almost all the errors on this program. Every time I compile I seem to get this error saying "array required, but java.lang.String found." I'm really confused on what this me

Scripting compilation causing dependency errors

I am compiling multiple TypeScript files into a single JavaScript file. Say for example they are called: A.ts // depends on C.ts B.ts // depends on C.ts C.ts When I checked the JavaScript output, I found a problem: TypeScript's __extends function fai

Compile the C ++ error

#include "std_lib_facilities.h" int main() { constexpr double euro_to_dollar = 1.11; constexpr double yen_to_dollar = 0.0081; double dollar = 1.00; char unit= 'A'; cout <"Please enter a value followed by e or y: \n"; cin >>dol

At what stage is the error?

Compilation generally occur in several stages:lexical analysis, syntax analysis, etc. Say, in C language, I wrote a=24; without declaring a as int. Now, at what stage of compilation an error is detected? At syntax analysis stage? If that is the case,

ifstream or ofstream types called by model function

I posted complete source code, I apologize to not have did it before. myclass.h: #ifndef MYCLASS_H #define MYCLASS_H #include <cstring> #include <iostream> #include <fstream> class MyClass { public: /* * @Brief Constructor */ MyClass();

Eclipse errors in projects

I am using eclipse for a project development. Yesterday all my projects were working quite well and today when I opened my eclipse its showing errors on some projects, when I expand the project there is no error markers either in the src folder nor a

Java asking for a semicolon when there is already one

I'm getting a very odd error where Java is asking me to add a semi-colon to the code even though there's one already. I'm clueless as to what to do. error: <identifier> expected final button.setIcon(new ImageIcon(program.class.getR

Apply explicit #include (direct) statements with GCC

I am wondering if it is possible to enforce direct #include requirements with GCC. Let say I have these files: abc.h: typedef struct { int useful; } str; file1.h: #include <abc.h> #ifndef GUARD #define GUARD #include <deh.h> typedef struct { i

output error in printing the number in c

int funcc(int a[],int b[],int *cnt) { int *c; int j,i,s=0; for (i=0;i<n;i++) for (j=0;j<n;j++) if(b[i]==a[j]) { *cnt++; break; } c=(int*)malloc(*cnt*sizeof(int)); for (i=0;i<n;i++) for (j=0;j<n;j++) if(b[i]==a[j]) { c[s++]=b[i]; break; } retur

GCC transparent union

So I have a union defined like: typedef union { uint8_t *b1; uint16_t *b2; uint32_t *b3; uint64_t *b4; } buffer_u __attribute__((__transparent_union__)); And a functions defined like: int write_byte_to_buffer(buffer_u buf, uint16_t length, uint8_t va

QtConcurrent :: run () can not handle more than 5 arguments?

I'm getting a compile error when passing a function with 6 parameters or more to QtConcurrent::run(). When I reduce them to 5 parameters, I no longer get this error. This dummy code reproduces the error for me: void foo(int, int, int, int, int, int)

What is the problem with my code (GWT)

I'm creating a login application on Eclipse using Google Web Toolkit(GWT). The code checks for the username and password and if its correct, it shows the o/p as welcome. Still after compiling it is giving me errors.I'm sharing both code and the error

Why should attribute properties be readable?

Consider the following attribute. internal class NiceAttribute : Attribute { private string _stuff; public string Stuff { set { _stuff = value; } } } When I try to use the attribute [Nice(Stuff = "test")] the compiler gives the following error.

hello world python extension in c ++ using boost?

Here's my simple first attempt at a python extension using boost. Can someone help me to understand what's causing the compilation error? #include <iostream> using namespace std; void say_hello(const char* name) { cout << "Hello " &l

The C ++ class compiles compile issues

Ive looked all over and I cant find anything relating to my problem. Im trying to write a class definition for a polygon class that basicly has a vector that holds pointers to a point. When I try to compile i keep geting the folllowing errors... erro

The overloaded function call is ambiguous

What does this error message mean? error: call of overloaded 'setval(int)' is ambiguous huge.cpp:18: note: candidates are: void huge::setval(unsigned int) huge.cpp:28: note: void huge::setval(const char*) My code looks like this: #include <iostream>

Error while importing msado15.dll

I'm trying to import msado15.dll into my c++ project but I get a bunch of errors like these: error C2018: unknown character '0x40' error C2146: syntax error : missing ';' before identifier 'ÿÿ¸' error C4430: missing type specifier - int assumed. Note

Compilation error on this string

I'm trying to create the following string: <script runat="server" type="text/C#"> protected void Page_Load(object sender, EventArgs e) { Parent.Page.ClientScript.RegisterStartupScript(typeof(Page), "test", "<scr