C :: Open Multiple File And Sort Them Using Function Prototype
Apr 9, 2013
I am quite new to C programming. Now facing lots of problem with the code below. I attempt to convert he alphabet sorting into function prototype model but still facing warning during compilation.
Besides, I wish to open multiple file at the same time as well using array looping method, but got no idea to modify it...
[URL] ....
Code:
#include <stdio.h>
#include <string.h>
#define SIZE 255
#define LEN 31
// Function prototype
void alphabetisation (int final, char *webaddress[]);
[Code] .....
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Dec 21, 2014
Right now, I have and application that opens a multi file dialog box. I want to take all of the files I highlight when the dialog box shows up and display a messsage box with the path and file names. This is what I have right now:
Code:
private: System::Void button1_Click_1(System::Object^ sender, System::EventArgs^ e) {
String^ folderName;
Stream^ myStream;
OpenFileDialog^ openFileDialog1 = gcnew OpenFileDialog;
openFileDialog1->Multiselect = true;
[Code] ....
Currently, it only shows the first file that I choose. I want to make it so that the message box shows all of the files that I select when the open file dialog shows up.
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Mar 30, 2013
[URL] ..... Prototype is commented.
[URL] ..... Prototype is included.
both give the correct output. Why?
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Aug 25, 2014
#include<stdio.h>
#include<conio.h>
#include<math.h>
void main() {
int i=1,j=2;
float k,l=1.5;
[Code] ...
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Apr 28, 2014
I am currently working on a C++ program for school. I am actually not finding too much difficulty in constructing the functions, enum-types, arrays and structs, however, I am finding great difficulty in using on ifstream variable to open multiple files.
I have posted the entire code that I have so far (even though I have pinpointed the issue to not properly opening the second file in ifstream).
I spent a couple of hours getting rid of certain functions/procedures, loops and variables and I get the same output (if what I removed doesnt crash it). I also get the same output whether I "open" the second file or not (meaning I removed all of the code for it and got the same output).
Here is the code (it's not finished because I am stuck on this file issue). It's a bit messy since I am now in debug mode versus program mode:
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Mar 30, 2013
The function im having problems with takes an array where each element is an array of unsigned chars i.e. octals representing a bitmap of one of 95 ASCII code characters and searches through this two dimensional array looking for a match for a predetermined of array of unsigned chars i.e. the bitmap of a predetermined char. If we find the char the function outputs the index in the two-dimensional array where each elem. is an array of octals ELSE it return -1 i.e. when the char is not found.
I have 2 files, one .cpp, the other .h. There is a function named find_char. See INPUT and OUTPUT on line 48 in .cpp file.
The exception im getting is: font2.cpp:23:45:error: invalid conversion from unsigned char to unsigned char(*)[5]
The input type specified for my function prototype corresponding to find_char. If I put just unsigned char it doesn't fix the problem because it's an array parameter i.e. like a call by reference. I've lead myself to believe that the array variable contains a pointer to the first value in the array and so I've made function prototypes that work with a T* i.e. a pointer to type T. Making the function prototype argument unsigned char* i.e. a pointer to unsigned char simply gives me the exception: "invalid conversion from unsigned char to unsigned char*". When I have the argument be 'unsigned char' I get undefined reference to find_char(unsigned char). URL.....
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Mar 29, 2014
This is my code:
#include<iostream>
#include<string>
using namespace std;
int bin2dec(const string binarystring); // Declaration of bin2dec prototype with one string parameter
int main() {
cout << "Enter Q to terminate program.
[Code] .....
Right now the code is in the form of a 'const string binarystring' and were supposed to be able to use 'const char binarystring[]' and for some reason whenever i try to switch it i run into problems when referencing the main function to the int bin2dec(...) function.
I wanted to know if theres a simple way to switch the prototype to an array type of function with [] without changing the entire code.
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Aug 20, 2014
Let's first take the following class prototype:
#include <ctime>
#include <iostream>
#include <sstream>
#include <string>
#include <fstream>
class Debugger;
class Debugger {
[Code] ....
My question is regarding the GetCurrentDebugLevel function above. Ideally I would like to use just one function to get the current debug level of the class, the std::string form would be used to save the "debugging level" in a settings file and the enumerated version would for evaluation purposes throughout the program.
My question is if implementing function prototypes by return value the best way to go or should I do something else?
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Apr 23, 2014
We can initialize normal function prototype's parameters with zero like this:-
void output(float = 0.0, int = 0);
or
void output(int = 0, int = 0, double = 0.0);
But how do you do the same for a pointer array or simply an array?
Assume that second parameter has to be an array.
I have tried the following and it does not work:-
void output(float = 0.0, int = 0);
void output(float = 0.0, *int = 0);
void output(float = 0.0, int* = 0);
void output(float = 0.0, int[] = 0);
void output(float = 0.0, int []);
But if I skip the default declarations altogether, it works.
like:
void output(float, int []);
or
void output(float, int*);
how can I do it by explicitly writing zero, just like the first cases?
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May 22, 2013
#include<iostream.h>
#include<conio.h>
int main() {
setcolor(BLUE);
setbkcolor(yellow);
cout<<"the text in blue colour with yelow background";
getch();
return 0;
}
it keeps returning the same error always in my turbo c++ compiler . What is the correct program for changing background colour and text colour ...
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Dec 6, 2014
what should be the prototype for the following function.
Code:void addition(int x, ...);
I am getting compilation errors. I have written the prototype as :
Code: void addition(int, va_list);
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Mar 24, 2013
Variably modified types are subject to certain restrictions , just as variable-length arrays are. The most important restriction is that the declaration of a variably modified type must be inside the body of a function or in a function prototype.
Code:
void f(int m , int n) {
int a[m][n] , (*p)[n];
p=a;
//....
}
What does it mean? That we can't declare such a pointer as a global variable?
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Mar 30, 2013
I am trying to computed the time it takes for a projectile to hit the ground. The problem is that i need to square the input of velocity before i do the calculation. the question I have is that if it's possible to have multiple arguments inside the brackets after main.
#include <stdio.h>
#include <math.h>
double distance (double a, double v, double g);
int square(int y);
double height(double v, double a, double g);
double time (double v, double a, double g);
double sqrt(double num);
[Code] ....
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Dec 4, 2014
How to how to make a function prototype that uses variables by reference. I'm making a decision based game where two running totals of two variables (ending and morality from decisions made) will decide the game outcome. I only have a few modules put in so far and most of the "story" parts cut down here to save space. I'm also getting an error saying there is more than one instance of overloaded function for the "whatToDo" module.
// ZombieGame.cpp : Defines the entry point for the console application.
//
#include <stdlib.h> /* srand, rand */
#include <time.h> /* time */
#include <iostream>
using namespace std;
//These are function prototypes to declare the functions being used
void WakeyWakey();
void TwentyMinsLater(int);
[Code] .....
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Dec 23, 2012
I have two problems with the code below:
1. I cannot find a header file to #include that has the sleep function prototype.
2. When I add my own sleep function prototype, I get an unresolved external reference error (for _sleep, not sleep).
What must I #include to get the sleep function prototype? What lib must I include in the linker configuration to resolve the external reference? (I suspect that if I #include the correct header file, the second question might become moot.)
The "man page" at [URL] .... says the header file is <WinBase.h>. But #include'g only <WinBase.h> results in compilation errors.
A response marked "answer" at [URL] ..... says <windows.h> [sic]. #Include'g only <Windows.h> does eliminate the compilation errors.
But apparently that does not bring in the sleep function prototype. Neither does also subsequently #include'g <WinBase.h>. (Which seems to be #include'd by <Windows.h> anyway.)
But even with my own function prototype shown below, I get an unresolved external reference for _sleep. Is that a symptom of my problem: my sleep reference is changed to _sleep? If so, how can avoid that?
According to "man page" (see link above), the external should be resolve in kernel32.lib. And kernel32.lib does appear in the "Additional Dependencies" list under Configuration Properties Linker Input.
Since I am not using C++ features, I tried setting "Compile as C" under Configuration Properties C/C++ Advanced, to no avail.
My code....
#include "stdafx.h"
#include <stdlib.h>
#include <time.h>
#include <Windows.h>
void sleep(DWORD msec); // added later
int _tmain(int argc, char* argv[])
[Code] ....
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Jun 4, 2013
I have written a C++ program I have multiple of CSV file used as input, which I open one at a time and close it after extracting data to a output file which is the only file.
I run getline(inFile,line);
outFile << line << endl;
I run this code, and only part of it is goes to the output file I got, also have spacing randomly to specific file and inconsistent
But when I slower the code, like system("Pause") in the loop, I can get extract what I want perfectly....
Is my program running to fast, why getline would be skipping part of what things I want?
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Dec 10, 2014
For whatever reason, I get an error meassage about lines 53-57 saying there is no matching function to call to. Yet the header and the prototype are correct (I think anyways).
#include <iostream>
#include <string>
#include <fstream>
#define N 10
using namespace std;
class cust{
[Code] ....
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Aug 19, 2013
Example radix sort function to sort an array of 64 bit unsigned integers. To allow for variable bin sizes, the array is scanned one time to create a matrix of 8 histograms of 256 counts each, corresponding to the number of instances of each possible 8 bit value in the 8 bytes of each integer, and the histograms are then converted into indices by summing the histograms counts. Then a radix sort is performed using the matrix of indices, post incrementing each index as it is used.
Code:
typedef unsigned long long UI64;
typedef unsigned long long *PUI64;
PUI64 RadixSort(PUI64 pData, PUI64 pTemp, size_t count) {
size_t mIndex[8][256] = {0};
/* index matrix */
PUI64 pDst, pSrc, pTmp;
size_t i,j,m,n;
UI64 u;
[Code]....
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Jan 9, 2013
I have the following private part of a class defined as follows:
private:
struct stats {
double ISIsum;
int authorCount;
bool operator<(const stats &a) const { return ISIsum > a.ISIsum;}
} *stats_;
bool compareSortByISI(const stats &lhs, const stats &rhs);
};
This enables me to sort this struct by calling:
std::sort(stats_, stats_ + authors_->getMaximumAuthors());
My question is, what if I want to have the option to sort by authorCount or ISIsum at run time. Is there any way to do this?
I can't see how I can override operator< twice and decide which one to call at use time.
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Apr 10, 2014
Consider the class specification below. Write the prototype (i.e. header) of a member function to overload the insertion operator (i.e. <<). The << operator is to output the data members of an instance of class StudentTestScores into an output stream. Your definition should allow for chaining of output operations (e.g. cout << x << y; where x and y are of type StduentTestScires).
#include <string>
using namespace std;
class StudentTestScores{
private:
string studentName;
float *testScores; // used to point to an array of test scores
int numTestScores; // number of test scores
[code]....
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Oct 28, 2013
so in declaring a display function prototype only that displays a student test scores in the format (student name tab number of scores tab test scores )
is this right?
#ifndef STUDENTTESTSCORES_H
#define STUDENTTESTSCORES_H
#include <string>
using namespace std;
class StudentTestScores{
private:
[Code]...
and also how do we call the display function if it is in a class from the header file onto the main cpp file.
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Nov 5, 2014
I'm new to C and was wondering if it was possible to print multiple characters to the same file using the fprintf function provided in one of the C standard libraries?
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May 6, 2014
I declared all functions in header file, such as:
bool readCase();
bool meshing();
bool readMesh();
bool calculateFlowfield();
bool readFlowfield();
bool calculateEvaporation();
And then I define them in separated .cpp files, each .cpp file include the header, but I got multiple definition error, why?
Even the int main() function, which only decalred and defined once got this error, why?
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Mar 22, 2013
how to sort a 1D array using function sort().but if i have a 2D array how do i sort only 1 row of it (or column)?
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Oct 24, 2014
My instructor mentioned using function in other function.
int test(double abc(double)){
// ... .....
double abc(double n){
// function main
}
as parameter
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Jul 6, 2014
error says "cannot convert 'int*' to 'int' in function main()
and also
type mismatch in parameter in function sort(int,int)
Heres the code:
#include<iostream.h>
#include<conio.h>
void main() {
void sort(int,int);
clrscr();
[Code] .....
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