Arrays

Multi-dimensional Arrays
• C/C++ can support multiple subscripts
• A tax table, for example, can be represented as a two dimensional array
• A two dimensional array consists of rows and columns. Each element of this array can be identified by two subscripts - the first one specifying the row, and the second one specifying the column
• Example: rates[2][3] references the element which is located in the third row, fourth column
• Note: the first row and the first column have subscript values of 0
• Example of two dimensional array processing:
  

  #include <iostream.h>
  /************************************************************
    File: array5.C
    An example of a two dimensional array
  ************************************************************/
  
  main()
  {
       int i, j, sum, scores[3][5] =
       {
            { 92, 73, 57, 42, 61 },
            { 88, 76, 23, 95, 72 },
            { 94, 82, 63, 99, 94 }
       }; // array initialization
  
       for (i=0; i < 3; i++) // loop over rows 
       { 
             for (j=0; j < 5; j++) // loop over columns 
                 sum += scores[i][j];
             cout << "Average of row " << i+1 << " is : " << (float (sum)/j)
  << endl;
       } 
       exit(0);
  }