C++ Code HELP!

[truly9ja]

Below is a program to input and print the total number of books sold every month for three years. Now, i can't display the sum of the total number of books sold in a particular year, but can only print the total sum of all the books sold for 3 years. I know I'm not doing the proper thing. I'm a beginner, I really need help to continue my reading. Thanks

Code: Select all

#include <iostream>
#include <string>

int main()
{
    using namespace std;
    int counter1 = 2000;
    int SumSold[3][12];
    int NumSold[3];
    string months[3][12] =
    {

        {
            "January", "February", "March", "April", "May", "June", "July",
            "August", "September", "October", "November", "December"
        },
        {
            "January", "February", "March", "April", "May", "June", "July",
            "August", "September", "October", "November", "December"
        },
        {
            "January", "February", "March", "April", "May", "June", "July",
            "August", "September", "October", "November", "December"
        }
    };

    cout << "NO. OF BOOKS SOLD FROM 2001 - 2003 " << endl << endl;
    for(int i = 0; i < 3; ++i)
    {
        ++counter1;
        cout << "YEAR " << counter1 << endl;
        for(int ix = 0; ix < 12; ++ix)
        {
            cout << "Books sold in " << months[i][ix] << ": ";
            cin >> NumSold[ix];
            SumSold[i][ix] = SumSold[i][ix] + NumSold[ix];
        }
    }

   for(int iv = 0; iv < 3; ++iv)
   {
       for(int inval = 0; inval = 12; ++inval)
       {
           cout << SumSold[iv][inval] << endl;
       }
   }
   return 0;
}

[ayu]

To count a specific year you could do something like this

Code: Select all

int year = 1; //the year to sum up
int sum  = 0;

cout << "YEAR: " << year << endl;

for(int i = 0; i < 12; ++i)
        sum += SumSold[year][i];

As in simply specify a constant number for the "year" index of the two dimensional array, instead of looping through all of it.

Didn't read all of the code very closely so the example above most likely isn't compatible with your code, but I hope you at least get the picture

[truly9ja]

Thanks for your input. But where should that code go in my code. I'm a bit confuse.

[ayu]

Thanks for your input. But where should that code go in my code. I'm a bit confuse.

That was just a small example, where you put the code is entirely up to you, and how you want the program to function ^^

One of the largest parts of programming is solving problems. I gave you the hammer, now figure it out! =)