C/C++ :: How To Find The Number Of Elements In Main Function
Jun 14, 2014
I have a function where i declared the number of elements in a vector alocated dynamically which returns the vector to the main function. The problem is how can i find the number of elements in main function? I tried length = sizeof(a) / sizeof(int) which gives me the same value, the value of the first element. Here's the code:
int* functie2 (void)
{
int* p;
int c,i;
printf("number of elements: ");
scanf("%d",&c);
[Code]...
I know i could first read the value of c in main and then pass it thorugh parameter, but how can i do it the other way arround?I could also send the value of c allocating one more int value to the vector, but i don't want doing so.
Where's the edit button?
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Oct 30, 2013
How would i get the total amount of elements From the input file(The .dat file) and then store them in a variable?Here is an example to show you what i want. If a line on the .dat file looked like this
1 2 3 4 5 6 7
How would i find the total number of elements? For example the total number of elements in this line would be 7.
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Nov 15, 2014
I use rand function to generate a number which consists of 3-5 digits(e.134,1435,73463..). The user decides whether he wants a 3 digit,4 digit or 5 digit number.After that,the user tries to guess the number.Its like mastermind game.The user will enter a number (with the same amount of digits) and the program will calculate how many digits from the secret number he has found and also how many digits he has found in the correct position(e.if the generatir produces the number 32541 and the user tries the number 49581 the program should tell him that he found 3 digits (5,1,4) and 2 digits in the correct position(5,1)) so that after some tries he finds the secret number.My problem is with the functions so that i can compare the digit of each number,find the amount of same digits and the amount of digits in same position.
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May 18, 2013
I am supposed to write a recursive function which find the partition of a number n ,, for example if n=3 , it should print 1 1 1 , 1 2 , 3
I wrote the program but i am getting the two partition 1 2 and 2 1 which are the same ,, how can i avoid that ?
this is the code :
void PrintPartition( int n , int A[] , int j ) {
if( n<=0 ) {
printArray( A, j );
return ;
} for( int i=1 ; i<=n ; i++ ) {
A[j]=i;
PrintPartition( n-i , A ,j+1 );
} }
the first call of the function is : PrintPartition( n , A , 0 ) ;
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Aug 9, 2014
The program need to find mean of elements in columns which are divided by 3. And to print which colmn has the greater mean
Example
For matrix:
7 9 5
17 15 30
29 34 60
Program print: 0 12 45. The greater mean: 3 column.
I wrote this code and it prints 0 12 45 idk how to find which column has greater mean?
Code:
#include <stdio.h>
#define max 50
int main()
{int n,m,i,j,k,d,br=0,suma;
int a[max][max];
int b[max][max];
printf("Kolku redici i kolku koloni da imat matricite: ");
scanf("%d %d ", &n,&m);
[Code]...
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Aug 28, 2013
I need to create a program that will find the total of all the elements in array. I need to use for loop and the array size is 10.The output should be like this: i used user input
Input array 0 : 2
Input array 1 : 4
Input array 2 : 6
Input array 3 : 7
Input array 4 : 8
Input array 5 : 9
Input array 6 : 10
Input array 7 : 12
Input array 8 : 16
Input array 9 : 20
Sum of 10 numbers in an array is = 94..Press any key to continue..I have a code but the output is not like that. Here is the code,
// Program to store 10 integers array
#include <iostream>
#include <stdio.h>
using namespace std;
int getArray(int x[]);
[code]....
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Dec 17, 2013
I have a question. How to find the average value of all the elements in a deque?
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Jan 12, 2014
I would like to know the algorithm or flow for finding unequal elements in an array entered by user. I tried using for loop but didn't get the expected output
Code:
#include <iostream>
#include <string>
using namespace std;
int main() {
int a[10],b[10]; //array of integer elements
[Code] ....
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Mar 31, 2013
Develop a function that finds the greatest difference between two consecutive elements stored in an array. Develop a 9 element array of doubles to test your code. Print to the screen which two numbers have the greatest difference as well as the value of the difference. Finally include an overloaded version of the function that will work if the array is composed of integers. Include your code used to test this function.
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Jan 19, 2013
Ok so I am working on a game and I'm in the process of developing my Player class. Anyways, what I have is a keyboard function that is called in my main function to make a shape move.
void myKeyboardFunction(unsigned char key, int x, int y) {
switch ( key ) {
[Code].....
But when I try to call it, trying to copy my previous method,
glutKeyboardFunc(Player1.playerControls);
I get an error
error C3867: 'Player::playerControls': function call missing argument list; use '&Player::playerControls' to create a pointer to member
I get an error saying it can't convert parameters. I would just like to understand why the arguments become a problem when I make the function a member of my class, when the first method I used is so easy.
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May 14, 2014
I want to send a number to my OPENGL class from my main dlg. Im using a updated edit control.
here is my open gl code that will draw what I want
Code:
void COpenGLControl::oglDrawScene()
{char side[32];
glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
glBegin(GL_LINE_LOOP);
for(int i = 0; i < 256; i++) {
glColor3f(1.0f,0.0f,0.0f);
glVertex3f( 1.0f, 1.0f, 1.0f);
[Code]...
I want to update the glVertex3f values when I enter numbers into edit controls on my main dialog
how can I send messages from my main dialog to the opengl class that I created?
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Jun 9, 2013
The function is supposed to return value from the file in my main, but I am getting empty value. I am trying to get better with pointer. Right now just teaching myself.
right now the only way for this code to show value is when in put the putchar(*ps) inside my readfile function. I would like to readfile to return value and print in the main function.
Code:
#include <stdio.h>
char *readfile(char filename[]);
int main(int argc, char *argv[] ) {
[Code].....
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Nov 14, 2014
Q. WAP to find the next palindrome number larger than the input number.
for eg:-
Input=25
Output=33
The program is giving correct output for number with all digits '9';
why is it not giving output.
#include<iostream>
#include<string>
using namespace std;
int main() {
int len,flag=1,count=0,num,ind;
[code]....
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Dec 26, 2014
I am writing a program in which a Fucntion has to be wriiten to parse the Command Line . When I include Code for parsing in main fuction iteslf ,its run ok . But I want to make a fucntion of that code and call it from main ,than it show Segmentation error .
By using Debugging I found Some thing is mess with " -m" Parameter of Command line , But Cant Rectify it ..
Code:
int main (int argc, char *argv[]){
//get_parameter_value(argc,argv);
// buffer[packet_size+1]= char ("'");
while (argc > 1) {
if (argv[h][0] == '-')
[Code] .....
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Feb 13, 2014
int example (int [], int, *int,*int,*int,*int);
int main () {
My code will be here
example (int array[], int size, &a,&b,&c,&d); // Like this??? I try it didnt work
[Code] ....
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Apr 20, 2015
I want to find number of comparison and number of exchanges from a list or other than a list. My list is this
12 5 11 19 4 7 8 10 9 6 22 2 9 1 32
First, I am looking for number of comparisons from a list of 10 numbers with 21inversions made by selection sort, insertion sort, exchange sort.
Also, I like to find number of exchanges from a list of 10 numbers with 21inversions made by selection sort, insertion sort, exchange sort.
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Aug 20, 2014
In the c pgm to find number of digits , if I am giving 001 as the input number ,why I am not getting the no. of digits as 3?
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Jul 26, 2014
How to get the number of elements of a multi-dimensional wstring?
The usual char array way not working.
Code:
int main()
{
wstring wstr[][255] =
{
L"bbbb",
L"bbbb",
L"aaa",
L"ccccccc"
};
int Size = wstr.size() / wstr[0].length();
}
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Apr 7, 2014
I can have at most 3 structs in array, but it could be 0,1,2 or 3 structs in array. I am trying to avoid dynamic memory allocation. I initialize sensors to 3 to reserve space for them in memory, since there may be at most 3 elements in the array. But I am testing a condition where there will only be 2 elements:
Code:
#include <stdio.h>#include <stdlib.h>
#include <string.h>
typedef struct {
unsigned long long int address;
float current;
unsigned char pressure_units;
} sensor;
[Code]...
The problem is even though there are only 2 sensors out of 3 in the array, sizeof(sensors)/sizeof(sensors[0]) returns 3. I assume because when it allocates memory for 3, it includes that allocated memory even though it really doesn't contain the struct. How can I figure out how many elements were really inserted into array, not just allocated to array?
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Jul 24, 2014
I am given an array with n elements but need to write a function where it returns n-1 elements. Do I need a loop for this? Or must I write a prototype...
Here is what I have thus far:
//given array with 5 elements function must return value 4 elements since -1 is a special character length of list is finite
#include <iostream>
using namespace std;
int main () {
int array [] = {1, 4, -1, 3, 2};
cout << "The array has " <<sizeof (array)/ sizeof (int)<< " elements"<< endl;
return 0;
}
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Apr 10, 2014
Is it possible to have array in class without number of elements, for example: I have a class called Plane with number of motors, and string array of passengers, but I don't have a number of passengers, but then again I have it in constructor, so can i print the list of passengers without having the number as part of the class.
Class Plane
{
private:
int motors; //number of motors
[Code].....
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Jul 18, 2014
I have a simple problem about memory allocation.In the function Nr_elements() i assign a value which represent the elements of array. The pointer p is initialised with the address of variable n, but when i compile i dont know why but dont work. This function return a pointer.
Code:
#include<stdio.h>
#include<stdlib.h>
int *Nr_elements();
int *allocate(int);
void deallocate(int *);
[code]....
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Aug 15, 2014
Code:
#include<stdio.h>
#include<stdlib.h>
struct node{
int data;
struct node *next;
[Code] .....
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Sep 10, 2013
Supposing you have a 3 or more overlapping arrays (arrays having elements in common), and you wish to select 2 or more of the arrays with the maximum number of elements but less overlap as compared to the rest of the overlapping arrays.
Eg. A[4],B[6],C[5]. A+B contains 10 elements but say the overlapping element is 3, meaning it has 7 unique element.
Also B+C=11 elements , but supposing it has 5 overlaps, it would mean it has only 6 unique elements. A+B+C=15. Supposing the overlaps are 11 then it means the unique elements are 4. Ect. So per the example, the best array options with most unique element would be A+B .
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Apr 22, 2013
Why isn't this bubble sort working?
void LList :: bubbleSort (LList A, int n){
Node *temp;
temp = Head;
int hold;
for (int pass = 1; pass <= n-1; pass++) // number of passes needed for bubblesort is the number of elements-1 {
for (int c = 0; c < n-pass; c++)//only runs for unsorted elements
[Code] ....
It is passed the LList, and the number of items in the list...
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Nov 20, 2012
#include <iostream>
using namespace std;
int main() {
int h;
double A[10][10];
[Code] .....
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