Arrays in C++ work much like Arrays in Java. They are 0 indexed (meaning their index values start at 0). The following are all ways we can create an integer array in C++
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Description
How to create arrays in C++
Arrays in C++ work much like Arrays in Java.
They are 0 indexed (meaning their index values start at 0). The following are
all ways we can create an integer array in C++
int x[10]; //creates an integer array of 10
elements. None of these elements are initialized
int x[]={3,4,5}; //creates an integer array of
3 elements with x[0]=3,x[1]=4, x[2]=5. Note that we don't have to specify the
size
You can also create arrays of doubles and any
of your other types you have encountered thus far.
A 2 dimensional array can be created as
follows
int x[2][4]; //a 2D array of 8 elements (2 in
one direction, 4 in the other)
You can create a 3D array in the same way.
Finding the value at a given
index in C++
Same as java!
cout<<x[3]; //will give you the 3rd
index, 4th value of the x array.
Do not overrun the end of your array by
putting an index value that's bigger than the length of the array. In C++ this
could lead to a segmentation fault or, the program may run but do something
funny. The result of overrunning the end of an array is undetermined.
Using For Loops To Cycle through
an array
The following code initializes all the
elements of an array to 0. This should be review. Note that we put the length
of the array as the bounds of the for loop
int x[10];
for (int i=0; i<10;i++)
{
x[10]=0;
}
