13/4/1435 h

1. 13/4/1435 h Lecture 2 Accessing Array’s Elements

2. Named Constants • Q: Mention the benefits of named constants when used as an array size declarator, give an example? • This eases program maintenance when the size of the array needs to be changed. • Ex: const int SIZE = 5; int tests[SIZE];

3. Q: Define array’s subscripts? • Each element in an array is assigned a unique subscript. • Subscripts start at 0 • The last element’s subscript is n-1 where n is the number of elements in the array. subscripts:

4. Q: How can we access array’s elements ? By using : • A constant or literal subscript: EX : • Integer expression as subscript: EX cout << tests[3] << endl; • int i = 5; • cout << tests[i] << endl;

5. Q : Write a general Format for accessing array’s Elements cout<< or cin >> Array Name [Array Subscript]; OR Array Name [integer Number];

6. Q: Write a c++ program that asks for the number of hours worked by 6 employee and stores the values in an array #include<iostream> using namespace std; int main( ) { const int num_emp = 6; int hours[num_emp]; cout<<“enter the hours worked by 6 employees”;

7. . // Get the hours worked by each employee cin>>hours[0]; cin>>hours[1]; cin>>hours[2]; cin>>hours[3]; cin>>hours[4]; cin>>hours[5]; //Display the values in the array Cout<<“the values you entered are:”

8. . cout<< “ “ <<hours[0]; cout<< “ “ <<hours[1]; cout<< “ “ <<hours[2]; cout<< “ “ <<hours[3]; cout<< “ “ <<hours[4]; cout<< “ “ <<hours[5]<<endl; return 0; }

9. Program output with example of input Here are the contents of the hours array, with the values entered by the user in the example output: