C++ :: Compiler Says There Is No Constructor But It Does Have One

May 29, 2013

Code:
activity = new Idle(this, NULL);
class Idle : public Activity {
private:
float mTimeInIdle;
public:
Idle() : mTimeInIdle(0) { }
Idle(Objects *actor, Goods *target) : Activity(actor, target)
{
}

Error 1 error C2514: 'Idle' : class has no constructors d:jackydocumentsvisual studio 2010projectsperfectsimperfectsimperfectsimObjectsObjects.h 43 1 PerfectSim

The activity = new Idle(this, NULL) line is located inside the Objects::Objects(...) constructor.

Would it be caused by some cyclic dependencies? How do I go about resolving it?

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C/C++ :: Use Of Implicit Default Constructor Provided By Compiler?

Sep 21, 2014

In C++ if no user defined constructor is provided for a class the compiler automatically provides a implicit default constructor.

An implicit default constructor is equivalent to a default constructor with no parameters and no body ?

So what is the use of a implicit default constructor provided by the compiler, if it is not going to do anything ?

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C++ :: No Constructor Could Take Source Type Or Constructor Overload Resolution Was Ambiguous

Mar 1, 2014

i am writing this bank accounts program using structures. i haven't implemented the function before that i want to check if the data is being read and printed. When i build and run the program in visual studio it gives me the following error. "No constructor could take the source type, or constructor overload resolution was ambiguous". Now whats wrong in this program?

/* Bank Accounts Program */
#include <iostream>
#include <string>
#include <fstream>
#include <cstdlib>//needed to use system() function
using namespace std;
const int MAX_NUM = 50;
struct Name{

[code]....

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C++ :: Calling Constructor From Constructor Set Pointer To Null

Jan 25, 2014

VS 2012 / Windows 7 64 bit

class
class myclass {
public:
myclass(){/*stuff here*/}
myclass(int* p) {MyPointer = p; myclass()}

[Code] ....

it works until the myclass(int* p) calls myclass()

then the MyPointer will become CCCCCCCC (NULL value)!

is there a way to stop the second constructor from resetting the pointer value to null?

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C++ :: Using Constructor Within Constructor In Same Class

Feb 28, 2012

I am trying to use constructor within constructor in the same class. Is that possible. I have tried something and it shows me a error message:

error: type "mainClass" is not a direct base of "glavna"

This is the program I tried:

Code:
class mainClass {
private:
int x,y;

Code] ......

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C++ :: Derived Class Constructor Using Base Class Constructor?

Jan 1, 2013

Is this example correct? This example from a book

Constructor of the Base Class
Person::Person(char* n="", char* nat="U.S.A", int s=1)
{
name = n;
nationality = nat;
sex = s;
}

Constructor of the Derived Class (inherited from the base class)

Student(char* n, int s=0, char* i=""):
Person(n, s)

Why the initialized list of the base class constructor doesn't match the initialized list of the derived class constructor? I know this book is a little bit old, I'm not sure if this wrong in VC++ 2010?

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C++ :: Using GNU GCC Compiler

Jun 9, 2014

I am programming with the Code::Blocks IDE and using the GNU GCC compiler. When I create an simple console application that uses strings it kind of glitches out, but here's the code:

#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;
int main()
ered: " << x;

[code].....

What the output is:

Please enter a string of text: Hello World
You entered: Hello
Process returned 0 (0x0) execution time : 4.735 s
Press any key to continue.

Anyway I don't know why it removes what I typed after the space I put in between Hello and World.

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C :: Gcc Compiler And Pointers

Mar 3, 2013

The first sample program that I am reading on the book has the following code:

Code:

* Demonstrates basic pointer use. */
#include <stdio.h>
/* Declare and initialize an int variable */
int var = 1;
}

[code]....

Is this a compiler error or is there a proper syntax for pointers using the gcc compiler?

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C++ :: Class Not Seen By Compiler?

Sep 18, 2014

I have an issue. VS 2013 isn't recognizing objects that I've declared when I use class functions.I'm getting this error: "Line 14 and 15: Error C2228: left of '.asciiToFpc6' must have class/struct/union"...Here's the relevant code:

Source.cpp

#include <cstdlib>
#include <iostream>
#include <fstream>
#include <string>
#include "fpc6.h"

[code].....

Additionally VS apparently doesn't like my bitwise operators in my class functions and doesn't think they're doing anything. It gives "warning C4552: ['|', '<<', '>>', '&'] : operator has no effect; expected operator with side-effect" for all of them, but it seems to me the code should work fine and actually accomplish things....

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C++ :: Compiler Optimization And Num Accuracy?

Jun 11, 2014

I could not find anything I could understand on this, so I have heard that -O3 option may reduce the numerical accuracy of doubles. Is this true?

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C :: Compiler Keeps Freezing / Crashing

Feb 11, 2014

I wrote this code as an assignment

Code:
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
main(){

int story, age=0;
int ranColor, ranCar, ranItem;

[Code] ....

And my compiler keeps freezing/crashing. using Dec C++

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C++ :: Compiler Not Recognizing Numbers

Sep 8, 2013

I'm working on this homework assignment where the program takes in the user's height in inches, weight in pounds, and age, then calculates their hat size, jacket size and waist size. The formulas for these are as follows:

Hat: (weight/height) x 2.9

Jacket: (height x weight)/288 then adjusted by adding 1/8 an inch for every 10 years over the age of 30 (The adjustment only takes place after a full 10 years, so there is no adjustment for 30-39, but there is for 40)

Waist: (weight/5.7) then adjusted by adding 1/10 of an inch for each 2 years over the age of 28 (the adjustment only takes place after a full 2 years, so no adjustment for 29, but there is for 30, etc)

I'm supposed to utilize functions for each of the three formulas.

There's a couple things I can't figure out.

1. Why won't the compiler recognize 2.9 and 5.7 as numbers?

2. How do I adjust the calculation for the jacket and waist based on age?

Here's what I've got so far:

#include <cstdlib>
#include <iostream>
using namespace std;
double hatSize(int weight, int height);
double jacketSize(int weight, int height, int age);
double waistSize(int weight, int height, int age);

[code]....

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C/C++ :: Compiler Configuration With Eclipse

Jul 7, 2014

I am using Eclipse to write C program. I download the CDT. However, I wrote the code but when I build it, I got an errors.

Make:*** No rule to make target all, Stop

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C/C++ :: Download And Install Gcc Compiler?

Jul 20, 2014

how to download and install gcc compiler?

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C/C++ :: Splint Warning In GCC Compiler?

Jun 7, 2012

/*@out@*//*@null@*/char *string_read ( ) {
int ch , pos = 0;
char *string;
if ((string = (char *)malloc (STRING_SIZE*sizeof(char))) == NULL)

[Code] ......

Fresh storage string not released before return A memory leak has been detected. Storage allocated locally is not released before the last reference to it is lost. (Use -mustfreefresh to inhibit warning) string_read.c:6:7: Fresh storage string created

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C++ :: Check If Compiler Has 11 Enabled?

Jan 28, 2012

Is there a way to check if a compiler has c++11 enabled?

I have a library and it has converters between std strings and the internal string type. I current have preprocessor surrounding the converters for u8string, u16string, and u32strings, but it requires the end user flip the switch manually. It would be nice if I could know at compile time without being told whether or not those types exist.

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C++ :: When Compiler Do Template Instantiation

May 2, 2014

As we know in the compilation stage, the compiler will instantiate a concrete type for a template, for example:

template<class T> void test(T m ) {
cout << m << endl;
}
int main() {
int kl = 0;
test<int>(kl);
}

In the main function, the compiler will try to have a int entry. Also we know that in the compilation stage, generally we have several steps: lexical analysis, syntax analysis, grammer analysis and intermediate language(IR).

So my question is: In which step is the instantiation done? Before IR or after IR?

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C++ :: Can One Constructor Of A Class Call Another Constructor Of The Same Class

Mar 19, 2015

to initialize this object? Why C++ FAQ says no? Here is my code,

Code:
class A
{
public:
A(int x, char c);
A(int x);

[code] ....

I don't have any trouble to call the constructor A(int x, char c) from another constructor A(int x).

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C++ :: Compiler Command Line Arguments

Jun 15, 2013

I have found this C++ online compiler (to use when I am at work): Compile and Execute C++ online

When you write and compile a program, on the right side (the "output" side), you can read this command line arguments:

$ g++ main.cpp -o demo -lm -pthread -lgmpxx -lreadline 2>&1

What is the meaning of the following arguments? -lm [link the math header file, right?]

-pthread
-lgmpxx
-lreadline

Any book (ebook, tutorial, printed book, whatever) where I can find all (absolutely all) these and other possible arguments?

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C++ :: Compiler Error C2664 And C2228

Nov 9, 2013

Working on a basic class program and I'm generating two compiler errors that I'm not sure how to fix. Header file, implementation cpp and main cpp are shown below. The specific errors are shown after the code.

Header file Code:

#include <iostream>
#include <string>
#include <cstdlib>
#include <iomanip>
using namespace std;

[Code].......

The file generates the second error, C2228, at lines 37-41 and 43. Basically where I tried using the second created object. Error message is "left of '.setFirstName' must have class/struct/union"

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C++ :: Compiler Error C2370 And C2011

Nov 29, 2013

Working on a solution involving inheritance. The whole solution is pretty massive at this point so I'll just focus on the problem areas. I'm getting a lot of "redefinition" and "undefined class type" compiler errors, including C2370, 2011, 2504, and 2027, in Benefit.h, Employee.h (the constant members are a big occurance) I'm also getting 2027 and 2079 in EmployeeMain.cpp. with my Benefit and Employee object calls.

Clearly I missed something in about how to code this correctly. Sadly the course textbook focuses on general OOP theory instead on the accompanying C++ syntax.

Benefit.h
Code:
#include <iostream>
#include <string>
#include <cstdlib>
#include <iomanip>
using namespace std;

[Code] .....

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C :: Determine Compiler Version And Which Standard It Uses?

Jul 18, 2013

Is there any code I can use to determine my compiler version and which Standard It uses? I know the following code determine that my compiler followed ANSI But how about a version of that? ****My OS is now Ubuntu

Code:
#include <stdio.h>
int main(void){
printf("File :%s
", __FILE__ );
printf("ANSI :%d
", __STDC__ ); //return 1 if it follow ANSI but version?
return 0;
}

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C :: Does Compiler Only Check Qualifiers Of End Destination

May 28, 2014

Code:

#include <stdio.h>
#include <stdlib.h>

const int* const ret_con()
{
typedef const int* const cip_to_c;
}

[code]....

I have two basic questions about what is happening:

1. The return value of ret_con should be pointing to const, but instead it's pointing to a (non-const) pointer to const. Does the compiler only check the qualifiers of the end destination, why doesn't this give a warning?

2. The original variable from ret_con (ci) is a local automatic, shouldn't its lifetime have expired when you leave the scope?

I also checked this with C++ compiler (taking out the auto keyword), it gave no warnings either.

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C :: Compiler That Change All Variable In One Occurrence?

Feb 3, 2013

what compiler that change all variable in one occurrence?

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C++ :: Writing Simple Compiler For A Language

Mar 13, 2014

I have a problem about compiler.I want to write a simple compiler for a language.

stm -> id := expr
| print expr
| if expr then stm
| while expr do stm
| begin opt_stmts end

[Code] .....

I guess I should create main.c to convert source code.Also,I should create a source.c to write a example program that is relevant with above grammar.

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C++ :: Unexpected Expression Compiler Error

Jul 30, 2013

My compiler (GCC) keeps expecting an expression where it shouldn't in 1 specific piece of my code:

int zxcNewWindow( HWND parent, TCHAR *text, zxWINDOW *kid,
UINT style, int x, int y, int w, int h, int type )
// right here
{
*kid = zxDefWINDOW;

The project contains only 2 files right now and the settings are just the default for an empty Code::Blocks 12.11 project. Both files are in UTF-8 format (tried in ASCII too), I just cannot see why this is not compiling correctly. I'll post the files in the next two posts.

Edit: For those of you who didn't get what the error was from the above here's the full log:

mingw32-gcc.exe -Wall -g -DzxDEBUG -c C:MePrjscppzxGUImain.c -o objmain.o
C:MePrjscppzxGUImain.c: In function 'zxcNewWindow':
C:MePrjscppzxGUImain.c:39:10: error: expected expression before '{' token
Process terminated with status 1 (0 minutes, 0 seconds)
1 errors, 0 warnings (0 minutes, 0 seconds)

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