is the action of adding an element at the end of a container.
push-back is the action of adding an element at the end of a container.
Questions tagged [push-back]
420 questions
0
votes
2 answers
C++ -- Adding elements to private member field std::vector
class T {
private:
std::vector myVec;
// ...
public:
T();
T(float x, float y);
std::vector getMyVec() { return myVec; }
// ...
};
// in T.cpp I don't use myVec in any way (not in the constructor either)
// in Tmain.cpp:
int…
Beko
- 982
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0
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2 answers
vector insert vs push_back performance issue
When I profiled my program, I discovered a bottleneck at:
for (int i = 0; i < len; ++i) {
vec->push_back(buffer[i]);
}
The for-loop lies in a function which is called 100k times.
After replacing it with the following code, the performance…
Radu
- 384
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0
votes
2 answers
I can't seem to get v.push.back() to work with strings
// ConsoleApplication25.cpp : main project file.
#include "stdafx.h"
#include
#include
#include
#include
#include
#include
using namespace System;
using namespace std;
int main()
{
…
Fox
- 3
- 2
0
votes
3 answers
push_back() in vector of a Point doesn't work
I have a problem with pushing a class Point into a vector.
I have a class Point:
Point::Point(){
this->X=1000;
this->Y=1000;
}
Point::Point(int x1, int y1){
this->X = x1;
this->Y = y1;
}
I create a vector like this:
vector…
user3314570
- 237
- 4
- 14
0
votes
2 answers
Vector does reallocation on every push_back
IDE - Visual Studio 2008, Visual C++
I have a custom class Class1 with a copy constructor to it.
I also have a vector
Data is inserted using the following code
Class1* objClass1;
vector vClass1;
for(int i=0;i<1000;i++) {
…
infinity
- 1,900
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0
votes
1 answer
Error with Push_back function for a LinkedList?
So, I've been working on a linked list pushback, and every time, I get some weird output, can someone help see what I'm doing wrong?
void IntList::push_back(int ne) {
if(head == NULL)
tail = head = new IntNode(ne);
IntNode *nes = new…
Marksman46
- 19
- 7
0
votes
1 answer
pushing back data into 2d vector in c++
vector col(0);
vector > row(0);
for(i=0;i<10;i++)
col.push_back(some integer);
row.push_back(col);
col.clear();
Can someone tell me what is wrong here? In the col[] vector, there is no error, but when I go to the next…
asker
- 15
- 1
- 2
0
votes
0 answers
Vectors in c++ is giving error segmentation fault while performing push_back? code is attached.!
segmentation fault is occurring just after the push_back in the first loop.
#include
#include
using namespace std;
vector a;
int main() {
int i,n,k,q,temp;
cin>>n>>k>>q;
for ( i =0;i>temp;
…
0
votes
1 answer
Problems with push_back in a vector
I'm creating a graph class in c++ but having some problems to insert elements into it. The graph is implemented using a vector > simulating a linked_list.
Here is my main.cc:
http://pastebin.com/xkamm7Jq
#include
#include…
Guilherme
- 443
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0
votes
0 answers
vector.push_back is not resulting in the right value being pushed back
I am practicing merge sort (for interview prep purposes). I am running into a very strange issue with vectors. It seems that pushing a certain value back onto the vector does not result in that value actually being put there. I could be missing…
ahmedalishaikh
- 113
- 1
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- 6
0
votes
2 answers
array instead of vector of vector, push_back() of elements. c++
I use approach of vector of vector and would like to change it into array for performance reasons. However I failed at trying to understand, how can I use array (dynamic) and push data in the end of the array, if I do not know how many data are…
beginh
- 1,133
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0
votes
1 answer
Updating the size of a vector of pointers using push_back inside a function class
I´m having a problem using push_back of a vector of a class inside a function class.
My codes are [All variables are in Portuguese, sorry]:
My Main:
int main(int argc, char* argv[])
{
//blah blah before here...
vector …
0
votes
1 answer
C++ vector.push_back crashes after pointer definition
my C++ compiler behaves very weird.
My vector is defined globally:
vector values;
This does not cause any error:
void locate( int r, int s, bool newCheck, int from = 0 ){
static int A = 255;
static int U = 1;
static int D = 2;
static int R =…
Milos9304
- 3
- 1
0
votes
1 answer
Singleton + nonstatic member - How to
class Scheduler:public Kolejka
{
private:
unsigned long real_time;
Scheduler(void) :real_time(0L){}
Scheduler(const Scheduler &);
Scheduler& operator=(const Scheduler&);
~Scheduler() {}
public:
std::deque kolejka;
//... …
Hrabia
- 19
- 7
0
votes
1 answer
segmentation fault during push_back
I'm getting a very weird segmentation fault on the following loop.
The goal is to have each processor do some checks of x/y points which are stored on the following vectors
Just to clarify: This is a multi-processor code not multi thread. This is…
giorgk
- 109
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