C++ :: Print Pattern Function That Handles Parameter As String

Sep 26, 2013

How to write a printPattern() function?

The function takes in a parameter i.e. a char pointer. It handles the parameter as a Cstyle string i.e. a NULL terminated char array. It does not make use of the stringclass or its associated functions. In other words, the function examines every char element in the array until it encounters the terminating NULL character.

Starting from this int main :

int main() {
char string1[] = "Application of C++";
printPattern(string1);
}

[Code].....

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C++ :: Design Pattern For Dynamic Function Parameter

Oct 26, 2014

I need to design an interface(a function prototype) that takes an argument which is used to pass information.
The information can be passed by independent modules and third party softwares and hence can vary today and in future.

Basically, the function interface(arg1, info)caters a niche service to many independent applications and needs to process based on requirements passed by applications in the argument(info, in example).

I am looking for a design pattern for the function parameter - info.

Should I use a void pointer that can be casted to respective application specific class in the function ? will this be a good C++ design ?

or should I take this parameter to be a pointer to a generic abstract class that points to the respective application specific specialization ?

Do we have some design pattern to address this so as to handle other unforeseen challenges ?

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C/C++ :: Design Pattern For Extensible Function Parameter

Oct 26, 2014

I need to design an interface(a function prototype) that takes an argument which is used to pass information.

The information can be passed by independent modules and third party softwares and hence can vary today and in future.

Basically, the function interface(arg1, info) caters a niche service to many independent applications and needs to process based on requirements passed by applications in the argument(info, in example).

I am looking for a design pattern for the function parameter - info.

Should I use a void pointer that can be casted to respective application specific class in the function ? will this be a good C++ design ?

or should I take this parameter to be a pointer to a generic abstract class that points to the respective application specific specialization ?

Do we have some design pattern to address this so as to handle other unforeseen challenges ?

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C/C++ :: Recursive Function To Print Hour Glass Pattern

Oct 11, 2014

I need to make a recursive function(s) which prints the hour glass pattern. This is my code so far:

void HourGlass(int n) {
if (n==1){
cout<<"*"<<endl;
cout<<"*"<<endl;
} else {
stars(n-2);
HourGlass(n-2);

[Code] ....

Problem is, it doesn't print the spaces in front of the pattern. This is what it prints:

*****
***
*
*
***
*****

and this is what it is supposed to print:

*****
***
*
*
***
*****

Do I make a separate function for the spaces? How do I go about it?

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C++ :: How To Use Function With Pointer Parameter To Print Array

Jul 20, 2013

The printArray function should take in the dynamically created array and the size of the array as parameters. It should print out the contents of the array.

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

[Code].....

My problem is that how to write the code to print the array using pointers. I've been stuck for awhile trying to figure it out.

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C++ :: How To Test A Compare Function With Parameter That Is Blank String

Feb 18, 2013

Modify your code by adding your own tests to see if your functions work right. Include at least 6 separate tests, of your choosing.

For example, test the compare function with the first parameter as a blank string -- then with the 2nd as a blank -- then both. Test compare with the first string shorter than the second -- then the other way around. Test your copy function with long strings.

I am struggling with how to use the compare function with a parameter as a blank string. I tried leaving the first parameter blank but doing ("",text) but I don't think that is the correct way of doing this.

#include <cstring>
#include <iostream>
using std::cin;
using std::cout;
using std::endl;

int myStrLen(const char[]); // return length of null-terminated string stored in char array

[Code] ....

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C :: Print Triangle Pattern Using One Loop And Recursion?

Dec 18, 2013

Q.print triangle pattern using one loop and recursion

eg: 5

Code:

#include <stdio.h>#include <conio.h>
void pattern(int n,int N) {
int i,c=1;

[Code]....

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C/C++ :: Program To Print Irregular Star Pattern?

Oct 5, 2014

I am trying to write a program that will make a pattern of stars. The last line is really tripping me up. I have to make the code only using the printf("*"); printf(" "); printf("/n"); statements once. I want to accomplish this with a for loops and if statements.

It is supposed to look like this:

* - 5 spaces before *
* * - 4 spaces before *
* * * - 3 spaces before *
* * * * * * - 0 spaces before *

This is what I've tried so far:

main()
{
int i, j, k;
i=1;
j=1;

[Code]....

here are the links on codepad [URL]

I think my first approach is way off. But I think I am on to something in the second link. I'm trying to print the "*" and extra 2 times on the fourth line. In the second link the compiler appears to be ignoring the || operator. Is my syntax incorrect in the second attempt? How should I change my if statement to make this pattern work?

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C++ :: Function Parameter Scope - NumArray Not Recognized As Valid Parameter

Sep 28, 2014

My errors are at the end of the program in two function calls within the definition of the InsertByValue function. g++ does not seem to recognize NumArray as a valid parameter.

#include <iostream>
#include <assert.h>
using namespace std;
const int CAPACITY = 20;

/* Displays the content of an int array, both the array and the size of array will be passed as parameters to the function
@param array: gives the array to be displayed
@param array_size: gives the number of elements in the array */
void DisplayArray (int array[], int array_size);

[Code] ....

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C :: Cycling Through Memory To Print String With And Without Function

Feb 10, 2014

Anyways, I have a problem where I'm trying to cycle through memory via pointers to print a string. Here is my code:

Code:

#include <stdio.h>
int main(void){
char word[]="hello there";

[Code]....

This seems to effectively portray what I want

How do I print a string using the same method for(;*pointer!='/0';pointer++) without a function?

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C/C++ :: Can Use Strtok For Splitting A String With A Certain Pattern

Oct 31, 2012

I have a string like "THIS::IS::THE:EXAMPLE::STRING"

I want to split the string to tokens based on "::".

The tokens should be:

THIS
IS
THE:EXAMPLE
EXAMPLE
STRING

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C++ :: Program That Handles Configuration Files - Config Parser?

Apr 9, 2013

I wrote a small program that handles configuration files. I was wondering if this code is considered "good?" I am also wondering if there are ways to optimize it.

class configFile {
std::vector<std::string> variables;
std::vector<std::string> values;
public:
/* declare the constructor function */
configFile(std::string loc) {

[Code] ....

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C++ :: Creating Diagonal Pattern By Given Function

Nov 5, 2013

How to create a diagonal pattern by the given function

void diagonal(int size, char op)

The function takes in 2 arguments, size and op and displays a diagonal line of op char. for example, diagonal (5,#) will produce the following output.

#
#
#
#
#

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C++ :: Design Pattern For Function Operation

Dec 11, 2014

Any design pattern allows to describe operation like the following.

MyFunctionObject f;
//Init f...
MyFunctionObject g;
//Init g...
MyFunctionObject h = f(g) + g;

[Code] .....

I'm interested in design pattern which permits to model this kind of structure, if there's of course...

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C++ :: Syntax Error In Function Call - Type Mismatch In Parameter In Function Sort

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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C :: String As Parameter Not Working Properly

Oct 19, 2013

I want to alter a string inside a function, but it is not working.Here is the function:

Code:

#include <stdio.h>
void test (char *ch){
ch[0] = 0;
ch[1] = 1;
ch[2] = '';
}

[code]...

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C++ :: Optional Parameter In String Stream

Sep 2, 2013

I'm reading in a data set using an ifstream, then fetching line by line to a stringstream:

std::ifstream sfile(filename);
std::string test;
std::getline(sfile, test);
std::stringstream sline(test);

(I'm not sure why I used an intermediate string; it's pretty much legacy-code at this point, which I just reuse every time. Still works, so why change it!)

The problem is I'm using two types of data sets now, and the difference is one (optional). Most data files just have an arbitrarily large number if the second must be ignored, but others have nothing.

In the normal case, I'd simply use sline >> d >> L; to extract the parameter values. However, I'm not sure how this line will behave if the second parameter is omitted. Will it read nonsense? How do I check whether or not the parameter was set or not?

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C/C++ :: Combining 2 String Parameters And 1 Int Parameter

Mar 20, 2012

#include <stdio.h>
#include <ctype.h>
#include <string.h>  
void interpose(char s[], char a[], int pos) {
    char b[80];

[Code] ....

The program should take 2 string parameter and 1 int parameter for combining. (without any str functions, the functions should be written by coder)

My problem is when i enter int value program crashes.

For example,
str1='Good';
str2=' Morning';
int x= 5;

The output will be 'Good Morning'

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C/C++ :: Pass A String As A Parameter And Use It To Open A File?

Feb 21, 2014

why I'm getting an error with this code? I'm trying to pass a string as a parameter and use it to open a file:

class txt{
private:
string tempstring;
vector<string> strings;
char filename[10]; //not using this right now

[code]....

but I get this error:

[Note] no known conversion for argument 1 from 'const string {aka const std::basic_string<char>}' to 'const char*'

I thought strings were just const character arrays

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C :: Won't Print Numbers Sorted When Use Print Function

Nov 17, 2013

I am making a program where the user enters numbers into an array and then a number,x. The array is sorted, then x is inserted into the appropriate place. I wrote my selection sort

Code:

void Sort(int ary[], int size)
{
int temp;
int smallest;
int current;
int move;
}

[code]....

put it wont print the numbers sorted when I use my print function, just the unsorted numbers.

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C++ :: Class Constructor With String Const Pointer As Parameter

Feb 19, 2013

I know my product.cpp constructor is wrong but how can I set my private variables.

//PRODUCT.h
#ifndef PROJECT1_PRODUCT_H
#define PROJECT1_PRODUCT_H

[Code].....

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C :: Declared A String Constant And Trying To Print Length Of String

Oct 9, 2014

In this code, i declared a string constant and trying to print the length of string. I know that if i write char a1[7] or char a1[] than it runs and give aggregate output, but in this case it is giving double length of string.

Code:

#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
}

[code]....

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C++ :: Enter A String Up To 99 Characters - Extra Parameter In Call To Count

Feb 3, 2013

#include<iostream.h>
#include<conio.h>
#include<stdio.h>
void count();
void main() {
char c[100];
cout<<"Enter a string upto 99 characters(spaces included):"<<endl;

[Code] ....

The thing is, when I don't create a prototype of count and straightaway define it before void main() my program runs, but it gives error in this program that "extra parameter in call to count()" But what to do then?

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C++ :: How To Use Function Name As Parameter

Oct 28, 2013

I have a class as below:

// RemoteControlMonitor.H
typedef void (*keyaction)(unsigned int key);

class RemoteControlMonitor {
private:
keyaction rph;
keyaction rrh;

[Code] .....

But I got compile error as below:

RemoteControlMonitor.H:58: invalid type `void *' for default argument to `void (*)(unsigned int)'
rcx1.C: In function `void __static_initialization_and_destruction_0(int, int)':
rcx1.C:54: ANSI C++ forbids implicit conversion from `void *' in default argument

What can I do?

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C++ :: How To Delete A Parameter In A Function

Apr 17, 2014

How I can delete a parameter in a function .

int *buildTrail(int antIndex, int start, double *pheromones) {
int *trail = new int[tabu];
bool *visited = new bool[tabu];
trail[0] = start;
visited[start] = true;

[Code] ....

If I comment all lines includes visited word , no exception occurs , Otherwise , exception throws.

Simply put , How can i delete visited parameter as long as its role has been finished?
.
.
.
delete visited ;
return trail;

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C++ :: Passing Function As Parameter?

Jan 7, 2015

gcc v.8.3 -std=gnu++11

[URL]

I'm trying to pass a function as a parameter and failing. It seems simple, until I get the error messages.

Here is the code:

class MinimalSolver {
typedef double (*func)(double sum, double char);
void driver();

[Code]....

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