I was going through a code where i found the definition of int array[63] in one of the source files. But i also found the declaration as extern int array[66] in another source file. This is clearly wrong, but my doubt is how the compiler compiled it. It should have thrown error. In case if it compiles then what will be the behavior of the system? Will it be normal or some undefined behavior?
View 3 RepliesI wanted to share the value of a variable from Sender Program to Receive after program and want to calculate difference between send and receive. After studying Header file concept I program following three.
Now I am struck. How to to compile? I link all these file. I used following method:
Code:
gcc Sender.c -o Sender Sender.h
gcc Receiver.c -o Receiver Student.h
Then I run Sender and after that Receiver.I per my knowledge, Receiver should give difference but it gives error :
Code:
Receiver.c: In function "main":
Receiver.c:10:42: error: "Send" undeclared (first use in this function)
printf(" Total Receive is %d
",Receive-Send);
Code:
Sender.c
#include <stdio.h>
int Send ;
void main(){
[Code] ....
My socket.cpp program got error. it showed "socket.h: no such file or directory". I had put my header file (socket.h) in the same place with my source file.
View 1 Replies View RelatedI would like to know the difference between the following two forms of array declaration:
(1)double myArray[3] = {1.0, 2.0, 3.0};
(2)array<double,3> myArray = {1.0, 2.0, 3.0};
If I say the second one allows to use different functions like .begin(), am I right? Is there any other difference between these two declaration?
i have 1 class with several class's and 1 structure:
Code:
struct Images {
HBITMAP ImageImage;
BITMAP Imagebm;
HDC ImagehdcMem;
HBITMAP ImageMaskImage;
[Code] .....
But I get these error:
"--------------------Configuration: Sprite2 - Win32 Debug--------------------
Compiling...
Test Sprite2.cpp
C:UsersJoaquimDocumentsVisual C 98Sprite2Test Sprite2.cpp(23) : error C2440: 'type cast' : cannot convert from 'void *' to 'struct Images'
No constructor could take the source type, or constructor overload resolution was ambiguous
Error executing cl.exe.
Sprite2.exe - 1 error(s), 0 warning(s)"
I try search more code, but i get more errors ...
I use a programming language called layout which nobody here has probably ever heard of. It was discontinued over 15 years years ago but it was a very visual & easy to use piece of software - no coding required. In fact once you name all the variables on cards (forms) from then on it's just mouse clicking & occassionaly typing a number if required. It used blackboxes in a flowchart arrangement which were pre-done code for doing just about anything. i.e opening windows, handling numbers & text, files etc. I have written many programs with it including database management, quoting software & currently use it in my business to track my jobs & do invoicing & ordering. It's a pity it wasn't updated & still around today.
[URL]
Back to the problem. Being a 16 bit program it was written to run on Windows 3.1 but still works on Windows 7!! as long as it is the 32 bit version. I need to write a program that will run on 64 bit W7 without resorting to using a virtual PC solution. I have tried to find something similar that I might be able to use instead but so far nothing comes close to Layout. I just remembered today that layout can produce not only .exe programs but also various versions of C/C++ including visual c++. So I got this idea that if I could get those files I might be able to stick them into a C compiler program to re-make a "modern" exe file.
I could just do a simple sample program & send the source code to them to see if it works on a 64 bit version of Windows 7. how I can do this myself to produce a working exe file.
how to get source path of selected file.
for example :
selected image in E:/
E:ewfolderillustration.jpg
application - asp.net(C#)
Visual studio 2012
I have a project that has a few .asm files (assembly language code), I have the compiler/assembler set to create a list file for the assembly code and would like the debugger to use the .lst file for the source instead of the .asm files because in the .asm files the macros are not expanded like they are in the .lst files which makes debugging difficult sometimes.
I want to understand the ways in which arrays can be declared and used. What each of the following do or what's the difference between them and what would be the length of each:-
1 - char ary1[50];
2 - char ary2[50] = {'H','e','l','l','o'};
3 - char ary3[50] = {'H','e','l','l','o',' '};
4 - char ary4[50] = {' '};
5 - char ary5[50] = {' ','H','e','l','l','o'};
6 - char ary6[50] = {' ','H','e','l','l','o',' '};
I have a little program that does some statistical processing on text files. The program has thrown a segmentation fault with an input file that is larger that I have used before. I didn't write this tool, so I went searching for the problem. Data from the input file is dumped into a 2D array and the program fails at the declaration of that array.
Code : double A[cont][Nr_col_split];
The vales for cont and Nr_col_split and determined from the input file and in this case, cont=807 and Nr_col_split=350. I assume that these values are just too large and not enough memory can be allocated, or something like that. Do I need to use reserve or similar to set aside enough memory? I will have input files that are quite a bit bigger than this one, so perhaps there needs to be a different solution for storing the input file data.
I have four source files. The main source file includes two other source files. The two other source files both include the fourth source file. In the fourth source file I have an include guard. Will the code from the fourth source file exist in two locations in the compiled code? Is this something that is compiler dependent? An example of this is shown in the code below.
Code:
// filename: main.c
#include "source1.c"
#include "source2.c"
[Code]....
I have written a program that copies a file from the source and pastes it there (same location), but with a different name. The program works fine, except there is a small bug that i can't seem to fix. Here is the code:
/*
This program copies a file from the current directory and pastes it to the same directory, but with a different name. The file name form the source must include the extension as well.
*/
#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
int main() {
char temp, s_file[100], d_file[100],
[Code] ....
This is the flow:
> 1) Enter the name of the file you'd like to copy (Must be from the current directory)
> A: 3.c // This depends if the file exists in the
> current directory
>
> 2) Enter the name of the destination file (The file will be copied to the same directory)
> A: 4 //The extension isn't necessary here
>
> Result: The file was copied successfully!
When I run the prg again, and this time input a file name with no extension, like this:
> Enter the name of the file you'd like to copy (Must be from the current directory)
> 3
> You did not enter a valid text. Press "?" to get help or "x" to exit.
I hit "?" and it takes me to
> 1. The file must be from the current directory)
> 2. The location mustn't be empty
Then it asks me
> Try again? (Y/N)
If i give N, it exits. BUT if I give Y, it goes, like this:
> Enter the name of the file you'd like to copy (Must be from the current directory)
> You did not enter a valid text. Press "?" to get help or "x" to exit.
You see, it doesn't give me the option to give it the file name..
For example, I have the below files in a project called Calculate :
Source files : Calculate.cpp , Average.cpp (with out main)
Header files : Calculate.h , Average.h
I knew in general, we have to include Average.h to project header file Calculate.h to make it as part of project.
technical difference between adding header file (Average.h) to either project header file (Calculate.h) or project source file (Calculate.cpp) ?
I found no difference in an output. But, there must be technical difference.
I have some files:
file1: 1000x500 array of numbers
file2: 2000x600
file3: 300x5000
...
I would like to automatically declare array variables of myarray1, myarray2, myarray3... that reads the numbers from files:
Code:
for (i1=0; i1<nrows; i1++)
{
for (i2=0; i2<ncolumns; i2++)
{
fscanf(filename, "%lf", &y);
myarrayX[i1][i2]=y;
}
}
nrows and ncolumns can be passed from a config file. Also I can cat all files into a single filename. However, the difficult part is:
How to declare different myarrayX automatically ? (A workaround is to declare a huge 3d array but I do not want to do this).
I am attempting to declare an array of pointers dynamically based on user input. I am not sure if A) I'm implementing the syntax of declaring a dynamic array correcntly and B) if my code is set up correctly to print otherwise.
int array_size;
cout << "Please enter the size of the array: " << endl;
cin >> array_size;
if(array_size >= 8) {
cout << "Invalid array size, please enter a valid integer size";
cin >> array_size;
[Code] .....
I'm having trouble declaring and initializing a two-dimensional array using the C++11 standard conventions. I would like to know how to do it in C++11 style as know how to use the old style.
the exception im getting is:
c++11_array_exp.cpp:37:3: error: too many initializers for ‘std::array<std::array<std::basic_string<char>, 6ul>, 22ul>’
you can find my code here:
[URL]
All I am trying to do is create another source file in a simple Visual Studio C++ console application.
I get the following errors:
intellisense: expected a delcaration
error C2447: "{" missing function header
I didn't create another int main () in this source file, so what is causing these errors.
I'm about to begin work on an exercise that requires me to maintain a list of the variables inside a c source file. I'm trying to figure out how I'm going to pluck out the variable names from all the other noise. My first thought would be to count any word that isn't a keyword or other type of grammar syntax, such as parenthesis, brackets, semicolons, etc. right?
View 10 Replies View RelatedLet's say I am using a library containing classes called class1 and class2 but both classes take three arguments to construct them. eg. class1(int a, int b, int c). and the same for class2
The below is an example of how to lay out the structure in the header and source file if class1 and class2 don't have any arguments in their constructor. But.... I'm not sure how to go about the below to take into account the constructor arguments of class1 and class2.
program.h
struct thestructure
{
thestructure(class1, class2); //constructor.
[Code].....
How to compile this source code and make a binary file
I think this need linux and run make command or gcc
This binary is a super user for android
source code attached
Attached File(s) : su.zip (7.59K)
i am using c language to program PIC micro controllers, i am making a multi compilation unit project in order to organize my code better.
I want to create an array of functions and be able to call it from anyplace in the code
what i have done so far gplib.c
Code:
typedef void (*out)(int8);
void OUT_A(int8 weight){output_A(weight);}
void OUT_B(int8 weight){output_B(weight);}
void OUT_C(int8 weight){output_C(weight);}
void OUT_D(int8 weight){output_D(weight);}
void OUT_E(int8 weight){output_E(weight);}
out output_port[5+1] = {OUT_A, OUT_B, OUT_C, OUT_D, OUT_E};
how to declare them in gplib.h and how to call them anywhere in the code.
Here's my program: - Program which inputs a string from user, reverses it and displays it.
#include <iostream>
using namespace std;
void string_reverse (char [], const int);
int main() {
const int arraysize = 10;
char string[arraysize];
[Code] ....
In the string_reverse function, I have declared temp character type array but on line 38, the
compiler is throwing 3 errors: -
error C2057: expected constant expression
error C2466: cannot allocate an array of constant size 0
error C2133: 'temp' : unknown size
I have declared a constant integer arraysize in line 35. Now I have no clue why is this happening because I think as I have declared it as a constant integer variable, this should not happen.
In the code given below using turboc++ 3.0(really old i get it but its school rules)
#ifndef emoji_h
#define emoji_h
class emoji//here for some reason {
};
#endif
error i get :line 3 declaration syntax error why and how to correct it?
Is it possible to create a program like Robocode, a game controlled at runtime by an external source file in visual c ++? For example create a checkers game where there would be an external source file, read at runtime, which would play automatically, with artificial intelligence. You can? If yes, how?
View 9 Replies View RelatedI have a header file in which we include vector at the top. But we want to remove that include. On doing so I get compilation errors as the header file uses std::vector<> at several instances in header file so I have to forward declare the vector to solve this issue.how i can do it.
Header file :
#ifndef MKLMulticlassOPTIMIZATIONBASE_H_
#define MKLMulticlassOPTIMIZATIONBASE_H_
#include <shogun/lib/config.h>
#include <vector>
#include <shogun/base/SGObject.h>
namespace shogun {
[Code]...
I am using OpenCASCADE environment to read STL file! I face a problem, with forward declaration error with the following
void StlReadIn::STL_Import() {
std::string FileName;
std::cout<<"
Enter the file name
";
std::cin>>FileName;
[Code] .....
Error message:
stlreadin.cpp:26:47: error: invalid use of incomplete type ‘struct StlMesh_Mesh’
/usr/local/oce-0.9.1/include/oce/Handle_StlMesh_Mesh.hxx:23:7: error: forward declaration of ‘struct StlMesh_Mesh’