- C++ includes arrays as other programming languages.
- Vectors are more versatile/singular/powerful than arrays and it’s a recommendation to switch to vector as fast as possible.
- Arrays stores fixed-size sequential collection of elements of the same type.
- Arrays consists of contiguous memory locations.
- Lowest address correspond to the first element and the highest address to the last element of the array.
Declaring arrays
Type arrayName [ arraySize ]; //this is known as single-dimension array
- Array size must be an integer greater than cero.
Example
int members[7]; //array of type integer with 7 elements
Initializing Arrays
- Initialize an array single statement
int members[4] = {10, 23, 42, 7};
The number of elements inside the braces { } cannot be longer than the value between the square braces[ ]
#include <iostream>
#include <array>
using namespace std;
int main () {
// create an array of 5 integers declaring it
int n[5];
// initialize elements of array n to 10-14
// n[0]= 10;
// n[1]= 11;
// n[2]= 12;
// n[3]= 13;
// n[4]= 14;
for (int i=0; i< 5; i++){
n[i] = 10+i;
}
// output each array element's value
//cout << n[3] << endl;
for (int o= 0; o<5; o++){
cout << "array index -> " << o << ", value -> " << n[o] << endl;
}
// get the array size
cout << sizeof(n)/sizeof(n[0]) << " array size" <<endl;
return 0;
}
