C++ :: How To Send A Pointer To ONE Element In 2D Array To Function

Feb 2, 2015

I am trying to do this.

if (isInteger(&(tokens[i][j])) == true || isDouble(&(tokens[i][j])) == true)

Instead of sending the address of the element at row I and column j, it send the address of the entire row I. What is wrong?

View 8 Replies


ADVERTISEMENT

C :: Access Element Of Array Through A Pointer To A Pointer

Dec 25, 2013

i have been fiddling with pointers but I don't understand how the proper syntax is written when I want to acces an element of an array through a pointer to a pointer...The code is all mostly just random bs for learning purposes. I marked the problem "// THIS LINE"

Code:

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#define MAX_DATA 100
int find_average(char *iden, ...) {

[Code]...

View 2 Replies View Related

C++ :: Pointer To Array Element?

May 13, 2013

How would I go about having a pointer to an array element specificity a character in a c-string.Every thing I try will not even build.An array is already a pointer to the first location of the array right?

char *pHead;
char *pTail;
pHead = sentence[0]; <=== This wont build
pHead = &sentence[0];
pHead = sentence[0]*;
*pHead = sentence[0]; <===== this builds but is not storing anything

View 5 Replies View Related

C :: Return Pointer To Largest Element In Array?

Sep 26, 2013

question from chapter 11, qn 8 modern C programming by king

Write the following function: Code: int *find_largest(int a[], int n); When passed an array a of length n, the function will return a pointer to the array's largest element

Code:

#include <stdio.h>
int *find_largest(int a[], int n)
{
int i, x;
x = 0;

[Code].....

have traced the code line by line and it prints correctly up to line 31. However, when the program exits (line 35) , it goes to some other screen with very complex code and my output disappears.

Just to clarify: If I just run the code as is, there is no output. However, when I trace the code line by line, the output appears, but then disappears as the program exits My input was 1 2 3 4 5 6

View 11 Replies View Related

C++ :: Linked List - Function Which Deletes Element If Next Element Is Bigger

Mar 10, 2014

So I have linked list and function which deletes element if next element is bigger, so my code is working but its not working with first element, in the comment I have wrote code which I would code for checking that first element, but when ever I check it is blowing up all program.

#include <iostream>
using namespace std;
struct llist {
int x;
llist *next;

[Code] .....

View 1 Replies View Related

C++ :: Remove Element From Array By Using Function?

Jun 2, 2013

how i can remove element from array by using function?

View 3 Replies View Related

C++ :: Function To Initialize Double Data Array Element To 0.0

Apr 25, 2013

ok here is the question: Write a function that will initialize a double data array element to 0.0 ?

View 4 Replies View Related

C++ :: Binary Search Function - Return True If Element Inputted By User Found In Array And False If Not

Nov 9, 2014

I was instructed to write a binary search function which would return true if an element, inputted by the user, was found in the array, and false if it was not. I'm not sure why, but my function always returns false. My code is as follows.

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;
//binary search function
bool search (int array[], int item)

[Code] ....

Why my code does not fulfill it's purpose???

View 7 Replies View Related

C :: Passing Array Of Pointer To A Function

Sep 7, 2013

Code:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_CMD_LINE 500
void tokenize(char *cmd_ln, char *fun_tknzd[], int *argument_cnt);

[Code] ....

I am trying to pass the value of fun_tknzd to str_tknzd

View 4 Replies View Related

C++ :: Returning A Pointer To 2D Array From A Function

Dec 10, 2014

I know how to pass a 2-D array to a function. The prototype for that is void f(int (*p)[2]) assuming the array is of integers and there are 2 columns in it.

However, if I wanted the same function to return a pointer to a 2-D array, what would be the prototype?

View 2 Replies View Related

C++ :: Passing Array As Pointer To A Function?

Apr 24, 2014

I can clearly understand how to pass a dynamic array to a function and modified within the function..

My aim is to get back the array initialized as I am trying on the next sample of code..

Code:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <iostream>
#include <fstream>
using namespace std;
#define N3//number of bodies
void initialise( double *M[], double *X[], double *y[])

[code]....

View 14 Replies View Related

C++ :: Char Array Reversing Function Using Pointer?

Feb 4, 2014

Why does this code doesnt work?

#include <iostream>
#include <cstring>
#include <string>
using namespace std;
class my_string {
char* ptr;

[code] ....

View 1 Replies View Related

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.

View 2 Replies View Related

C :: Declaring Pointer Variable To Array Of Function Pointers?

May 24, 2013

I am having following pointer variable declaration

Code: Static double (*funcs[]) (double) = { sin,cos,tan,asin,acos};

Here funcs is an array of pointers to functions which take double as input and gives double as output with static as storage type am I right.

View 2 Replies View Related

C++ :: Enforcing That A Function Does Not Modify Dynamic Array Pointed To By Pointer

Aug 21, 2014

In case the question was not very clear. Say I have the following code:

int sum(int * x, size_t N){
int sx;
/* returns sum of elements in x */
return sx;

[Code] ....

I'm curious to know whether there is a way that ensures a function does not modify the memory pointed to by a pointer.

View 9 Replies View Related

C :: Calling Function Via Function Pointer Inside Structure Pointer

Mar 14, 2013

I'm trying to call a function via a function pointer, and this function pointer is inside a structure. The structure is being referenced via a structure pointer.

Code:

position = hash->(*funcHash)(idNmbr);

The function will return an int, which is what position is a type of. When I compile this code,

I get the error: error: expected identifier before ( token.

Is my syntax wrong? I'm not sure what would be throwing this error.

View 3 Replies View Related

C/C++ :: How To Send PPM To A Function In Another File

Apr 7, 2015

I have an assignment where I have to alter a ppm image and send it to a function in another file to print the new altered version.

#include "transform.h"    
int main (int argc, char *argv[])  {  
    // declarations here
    FILE *inFile;      
    // open input file 
    inFile = fopen("tiger.ppm", "r")

[Code] ....

View 1 Replies View Related

C/C++ :: Unable To Send Maximum Long Value Through Function Call

Jun 11, 2014

I am trying to send the maximum long value through function call, but i didn't print proper value..

[
#include <stdio.h>
long long floatToInteger_old(float value){
printf("float val : %e",value);
}
int main(){
float value = 340168346567;
long long finalhexVal = floatToInteger_old(value);
return 0;}
]

my actual output is 340168346567, but it is printing 3.401683e+011 or 340168343552.000000.
how can print exact value what i am sending.

View 7 Replies View Related

C++ :: Calling Defined Function Pointer From Another Pointer To Class Object?

Aug 19, 2014

I am attempting to implement function pointers and I am having a bit of a problem.

See the code example below; what I want to be able to do is call a function pointer from another pointer.

I'll admit that I may not be explaining this 100% correct but I am trying to implement the code inside the main function below.

class MainObject;
class SecondaryObject;
class SecondaryObject {
public:

[Code]....

View 10 Replies View Related

Visual C++ :: Read JPG As Binary In MFC App And Send To JavaScript Function In HTML Page?

Sep 6, 2013

I am writing an MFC app in Visual Studio 2012 that will open a JPG file as binary and read all the contents to a CString.

I am able to read it to a std::Vector, but that doesn't work much as i need to pass all the binary content as a MFC CString to another function.

More Update:

Let me explain the problem a little more deeper.

I am trying to call a JavaScript (JS) function in a HTML page and then want to pass the binary date. The C++ function that calls the JS is given below.

bool CallJavaScript(const CString strFunc,CComVariant* pVarResult);

The 1st argument is the JS Function Name and 2nd is the one to pass the Binary Data. 1st argument works fine as i am able to call the JS fucntion called "LoadImage" without any problem. Problem is with 2nd argument that's supposed to take the Binary data of the JPG file.

If i try to pass a std::Vector or std::string then it will give me an error.

But it's happy if i pass CString. But then with CString there's a problem with NULL characters.

Actually my plan is to pass the binary of a JPG to a JS function and let it display the JPG in the HTML page.

Can i typecast a Vector or std::string to a CComVariant*?

View 3 Replies View Related

C++ :: Write Function That Doubles Every Element?

Dec 5, 2013

how would one write a function that doubles every element of a 20×10 2-dimensional array? this is what i've got so far.

double arrary [i][j];
for(double i=0; i<20;++i) {
for (double j=0;j<10;++j) {
array[i][j] =

[Code]......

View 5 Replies View Related

C++ :: Only The Last Element Of Array Works

Oct 5, 2014

My code has been acting odd. I made a function that layers my art resources but only the last tile of my art resource acts the way it should. My character goes behind and in front of the last tile and gets printed correctly. Strangely its really exclusive to the last tiles I print. What I need is to figure out in step by step order what going on with my code sample below and be able to layer the resources.

Here is a small sample of my main function. This is how I do my rendering.

Code:
Int main (int arc, char* args[]) {
//Move class
Move character;
//Class Tile & Side Tile
Tile *tiles [TOTAL_TILES];

[Code] ......

View 14 Replies View Related

C :: Comparing Each Element Of One Array With Another

Mar 6, 2015

how to compare each element of array with another,defined ? I have tried this,but didn't work.

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void bill()

[Code].....

View 3 Replies View Related

C :: Remove Array Element?

Jan 27, 2013

I want to a C program to delete an element from an array which can use both index method & character method
For example

input : "1 222 333 4444"
output:"1 22 333 4444"
if either index = "4" or character ="2" is entered

It should able to read in/accept any input array of varying length, and the position/index or element in array to be deleted...

View 6 Replies View Related

C++ :: How To Delete Element From Array

Jan 9, 2015

how to delete an element(s) from an array; suppose I have an array x[10] = {1,2,3,4,5,6,7,8,9,10}, and I want to delete array{5} so that the values of the array become {1,2,3,4,5,7,8,9,10}; how do I go about this? This is not the same as setting the value of array{5} to null; but completely eliminating it so that it does not get printed alongside the other elements of the screen.

View 3 Replies View Related

C++ :: How To Find First Element In Array

Oct 7, 2013

Lets assume, I use array of 100 the i input 50 element and now i want to find which one is first in array... without using pointer ...

View 2 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved