Simple Array Query

[dim_syniad]

Hello! I know this is probably very easy and quite obvious but I just can't seem to find the answer anywhere and so thought perhaps someone here could help me. I am working on a program which asks the user to tell it how many values are to be stored in the array and then the program asks for each value in turn. I know how to ask for each value, but not sure how to create an array with a changing amount of data to be held in it.

This is a simplified version of my array to explain it better...

int age[5]; 
age[0]=12;
age[1]=14;
age[2]=18;
age[3]=40;

How do I get the user to change the number of values in the array - from the 5 to say 3 or 9?

Many thanks, I'm sure it's very easy! Just having a bad day....

[TheCPUWizard]

Arrays are fixed size. Do yourself a big favor and use the appropriate STL containers, easier, more reliable, more powerful. In this case std::vector<int>

[Lindley]

While std::vector is the recommended way to do this, you should also know how to use operator new[].

[TheCPUWizard]

While std::vector is the recommended way to do this, you should also know how to use operator new[].

Lindley is correct. ...

But as soon as you call new[], your need to also understand operator delete [] (remembering to always pair new/delete and new[]/delere[]) and robust exception handling. Each of these is REQUIRED if you are going to be using dynamic naked arrays....

[cilu]

Here is a tutorial for vector: http://www.codeguru.com/Cpp/Cpp/cpp_...icle.php/c4027.

How do I get the user to change the number of values in the array - from the 5 to say 3 or 9?

Like this:

int size = 0;
cout << "Array size: ";
cin >> size;

int* array = new int[size];

...

delete [] array;