C++ LANGUAGE ACCESSING ARRAY ELEMENTS PAGE 82

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C++ LANGUAGE ACCESSING ARRAY ELEMENTS

Accessing Array Elements 

An element is accessed by indexing the array name. 
This is done by placing the index of the element 
within square brackets after the name of the array. 
For example: 

double salary = balance[9]; 

The above statement will take 10th element from 
the array and assign the value to salary variable. 
Following is an example, which will use all the 
above-mentioned three concepts viz. declaration, 
assignment and accessing arrays: 


#include <iostream>
 
using namespace std; 
  
#include <iomanip> 
using std::setw; 
  
int main () 
{ 
   int n[ 10 ]; // n is an array of 10 integers 
  
   // initialize elements of array n to 0           
   for ( int i = 0; i < 10; i++ ) 
   { 
      n[ i ] = i + 100; // set element at location i to i + 100 
   } 
   cout << "Element" << setw( 13 ) << "Value" << endl;

// output each array element's value                       
   for ( int j = 0; j < 10; j++ ) 
   { 
      cout << setw( 7 )<< j << setw( 13 ) << n[ j ] << endl; 
   } 
  
   return 0; 
} 

This program makes use of setw() function to format the output. 
When the above code is compiled and executed, it produces the following result: 
Element        Value 
      0          100 
      1          101 
      2          102 
      3          103 
      4          104 
      5          105 
      6          106 
      7          107 
      8          108 
      9          109