Counting the # of items in an array

This is a discussion on Counting the # of items in an array within the C++ Programming forums, part of the General Programming Boards category; I have this prog and what I need to do is have the user input their numbers and print the ...

  1. #1
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    Counting the # of items in an array

    I have this prog and what I need to do is have the user input their numbers and print the array, Then, for it to count the number of times the number was inputted and print a histogram of the number of times it was used. EX:

    2.......10........3.5
    4.......3.5 ..........21
    3.........8...........7
    //etc....

    response ........# of times....... Histogram
    1 .................... 2 ..................**
    2 ................... 1 .......................*
    //etc....

    Here is what I have and I am unsure of the last few lines. I copied the last couple of lines from another example, I just included it because I know it will look somewhat to those lines. Please help, any help appreciated!

    Code:
    #include <iostream>
    #include <iomanip>
    using namespace std;
    
    const int numrow = 5;
    const int numcol = 3;
    
    int main ()
    {
    double nums[numrow][numcol];
    	
    	for (int i = 0; i <numrow; i++)
    {
    	for (int j = 0; j < numcol; j++)
    {
    	cout << "enter grades for row # " << (i + 1)<< ": ";
    	cin >> nums [i][j];
    }
    }
    	for (int a = 0; a < numrow; a++)
    {
                    for (int b = 0; b < numcol; b++)
    {
                   cout << setw (4) << nums [a][b];
    }
                   cout << "Response" << setw( 13 ) << "Frequency"
                    << setw( 17 ) << "Histogram" << endl;
    
       for ( int i; i < numrow; i++ ) 
    {
          cout << setw( 7 ) << i << setw( 13 ) 
               << n[ i ] << setw( 9 );
    
          for ( int j = 0; j < n[ i ]; j++ )   // print one bar
          cout << '*';
       
       cout << endl;
    }
       return 0;
    }
    Last edited by stevedawg85; 03-23-2006 at 08:20 PM.

  2. #2
    C++ Witch laserlight's Avatar
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    Here is what I have and I am unsure of the last few lines. I copied the last couple of lines from another example, I just included it because I know it will look somewhat to those lines.
    What do you think those 'last few lines' are supposed to do?
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  3. #3
    and the hat of int overfl Salem's Avatar
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    > Please help, any help appreciated!
    But always ignored
    How to create a multi-dimensional user array?
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