[johngrant1509]

Hi just wondering could anyone help me with a problem i'm having? this is a program to print out a table showing which employees have sold there product and how much they've made but i'm havin a problem with the array anyone got any ideas?

// Lab 3(c) Salesperson
// sales.cpp
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
using std::fixed;
#include <iomanip>
using std::setprecision;
using std::setw;
int main()
{
	const int PEOPLE = 5;
	const int PRODUCTS = 6;
	const int SIZE = 5;
	
	double sales [SIZE]= {0,1,2,3,4};
	
	double value;
	double totalSales;
	double productSales[ PRODUCTS ] = { 0.0 }; // line 25
	int salesPerson;
	int product;
	
	cout << "Enter the salesperson (1 - 4), "
		 << "product number (1 - 5)\nand total sales."
		 << "Enter -1 for the salesperson to end input.\n";
	
	cin >> salesPerson;

	// process sales
	while ( salesPerson != -1 ) 
	{
		cin >> product >> value;
		/* Write a statement that adds values to the
		sales array */
		cin >> salesPerson;
	} // end while
	// table header: describes output and prints
	// column header(product numbers 1-5)
	cout << "\nThe total sales for each sales person "
		 << "are displayed\nat the end of each row,"
		 << "and the total sales for each\nproduct "
		 << "are displayed at the bottom of each column.\n"
		 << setw( 10 ) << 1 << setw( 10 ) << 2
		 << setw( 10 ) << 3 << setw( 10 ) << 4
		 << setw( 10 ) << 5 << setw( 12 ) << "Total\n" << fixed
		 << setprecision( 2 );
		
		// nested loop structure: prints salesperson number
		// followed by the amounts sold for each product
	for ( int i = 1; i<5 ; ++i ) 
	{
		totalSales = 0.0;
		// print salesperson number
		cout << i;
		// inner loop: prints amounts sold for each product
		
		for ( int j = 1; j<=6; ++j ) 
		{
			totalSales=totalSales + j;
			
			// print sales for each salesperson for each product
			cout << setw( 10 )
				 << sales[ i ][ j ];
			
			productSales= productSales + sales;
		} // end for

		// print the last column item (total sales of each
		// product). The totalSales value is 9.99 under
		// "Total" in the output box. After this value is
		// printed, the next table line can be created
		cout << setw( 10 ) << totalSales << '\n';

	} // end for

	// header for last row
	cout << "\nTotal" << setw( 6 ) << productSales[ 1 ];

	// prints last row which displays total sales
	// for each product
	for ( int j = 2; j < PRODUCTS; ++j )
		cout << setw( 10 ) << productSales[ j ];

	cout << endl;
	return 0;
} // end main

[JackOfAllTrades]

How about telling us what's the problem?

[johngrant1509]

well i get these errors when i try to compile it

lab3©.cpp(65) : error C2109: subscript requires array or pointer type
lab3©.cpp(67) : error C2110: '+' : cannot add two pointers

And im also not quite sure what i hav to do here

/* Write a statement that adds values to the
sales array */

[sarmanu]

<< sales[ i ][ j ];

sales is a one-dimensional array, and it can't have two subscripts, as there are no rows and columns. Use only one subscript, like sales[i] or sales[j]. Also, arrays in C/C++ should be indexed from 0 -> N - 1.

[johngrant1509]

thank you sarmanu but is there a way to add rows and columns as i think it might be something i have to do.

[sarmanu]

Declaring a two-dimensional array is easy. Here, I will show you how to add a statically allocated two-dimensional array:

// a is a two-dimensional array (simply called "matrix").
// it can hold a maximum of 20 rows and columns
int a[20][20];

// How to access an element: write down the name of the matrix,
// then, using two subscripts, you access the row and the column:
a[0][0] = 34; // add 34 on line 0 and column 0
a[0][1] = 10; // add 10 on  line 0 and column 1

a[2][4] = 0; // add 0 on line 2 and column 4

A method of printing a matrix:

for (int i = 0; i < number_of_rows; i++)
{
   for (int j = 0; j < number_of_columns; j++)
       std::cout << my_matrix[i][j] << " ";
   std::cout << "\n";
}

where my_matrix is your two-dimensional array, number_of_rows and number_of_columns are self-explanatory.

This post has been edited by sarmanu: 05 April 2010 - 06:37 AM

[johngrant1509]

thank you very much for that it was very well explained i have put in that info and everything is fine now except for the one error im now getting

cpp(67) : error C2110: '+' : cannot add two pointers

the info there before i started the project was

/* Write a statement that adds the current sales
element to productSales */

i inserted

productSales= productSales + sales;

is this wrong?