Array

[chuahyucheng]

how to insert a variable for the size of array and prompt user to insert the elements for the array?

[codewalker]

If you mean declare a variable with size of array and the aim is to get n number of elements then you can do something like

const int arraySize = 10;
//declare array and other code
std::cout << "enter " << arraySize << "elements" << std::endl; 
//other code 

[chuahyucheng]

What I want is arraySize=x
x is to be inserted by user. After that prompt user to insert the elements.

[codewalker]

int arraySize = 0;
//some code
std::cout << "enter number of elements" << std::endl;
std::cin >> arraySize;
//declare and define array 
//read each elem using loop for arraySize - 1 times 

[chuahyucheng]

Then how do you input the array?
Is this correct?

cout<<"Enter the total number of workers:"<<end;//Prompt user to input the array size

cin>>workers;//User will input the data

int n[workers]=

After int n[workers]= , what should I do to prompt user to input the number of elements according to the array size?

[Kiyoshi Kouhei]

this should help

int arraySize = 0;
cout<<"Enter array size"<<endl; //prompts user for number of workers
cin>>arraySize; //number of workers

int arrayElement[arraySize]; //declairs the array with the input size
cout<<"Enter array value"<<endl; //prompts user for value in the array
for (i=0;i<arraySize;i++) //loops the array from 0 to < arraySize for value of array
{
cin>>arrayElement[i];}

[chuahyucheng]

It does not work. From int arrayElement[arraySize] onwards. The arraySize will be in red

[Kiyoshi Kouhei]

try this 1 ..dynamic array

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

int main ()
{
  int i,n;
  int * p;
  cout << "How many numbers would you like to type? ";
  cin >> i;
  p= new (nothrow) int[i];
  if (p == 0)
    cout << "Error: memory could not be allocated";
  else
  {
    for (n=0; n<i; n++)
    {
      cout << "Enter number: ";
      cin >> p[n];
    }
    cout << "You have entered: ";
    for (n=0; n<i; n++)
      cout << p[n] << ", ";
    delete[] p;
  }
  return 0;
}

[chuahyucheng]

Something is wrong with your code. There is an error. :(

[Kiyoshi Kouhei]

i am using VS 2008

[chuahyucheng]

I am using VS 2010

[Chriscpp]

There is no error I'm using CodeBlocks

[andywestken]

Variable sized arrays are not kosher C++ -- they're a C99 feature that GCC's compiler allows you to use if you don't ask it to enforce ANSI compliance.

Andy

[chuahyucheng]

Thanks for helping guys :)