Array trouble

Ok,
I have a 2d array, and am reading the numbers from a file. I have to display them, and display the average of the sum of the columns and rows.
I can display them, but i can't get the sum correct. It comes up with a wierd number.
The part in bold is where i compute the sums of each row and column.

Code:

---

#include <iostream>
#include <string>
#include <cmath>
#include <iomanip>
#include <fstream>

using namespace std;

void Compute_Sums(int Array1[][3], int RowSums[], int Colsums[]);
void Compute_Avg(int RowSums[], int Colsums[], float RowAvg[], float ColAvg[]);
void Print(int RowSums[], int Colsums[], float RowAvg[], float ColAvg[]);

void main()
{
        ifstream Array_Info;
        Array_Info.open("A:IntFile.DAT");       

        int Array1[7][3], RowSums[7], Colsums[3];
        float RowAvg[7], ColAvg[3];

        Compute_Sums(Array1, RowSums, Colsums);
        Compute_Avg(RowSums, Colsums, RowAvg, ColAvg);
        Print(RowSums, Colsums, RowAvg, ColAvg);
       
}

void Compute_Sums(int Array1[][3], int RowSums[], int Colsums[])
{
        int row;
        int column;
        row = 0;
        column = 0;
               
        for(column = 0; column < 3; column++)
                Colsums[column] = 0;
                       
        for(column = 0; column < 3; column++)
                for(row = 0; row < 7; row++)
                        Colsums[column] = Colsums[column] + Array1[row][column];

        for(row = 0; row < 7; row++)
                RowSums[row] = 0;

        for(row = 0; row < 7; row++)
                for(column = 0; column < 3; column++)
                        RowSums[row] = RowSums[column] + Array1[row][column];
               
}
void Compute_Avg(int RowSums[], int Colsums[], float RowAvg[], float ColAvg[])
{
        int row;
        int column;
        row = 0;
        column = 0;

        for(row=0; row<7; row++)
                RowAvg[row]=RowSums[row]/3.0;
       
        for(column=0; column<3; column++)
                ColAvg[column]=Colsums[column]/7.0;
               
}
void Print(int RowSums[], int Colsums[], float RowAvg[], float ColAvg[])
{
        ifstream Array_Info;
        Array_Info.open("A:IntFile.DAT");
        int Array1[7][3];
               
       
        cout<<"      "<<"Fish1"<<"  "<<"Fish2"<<"  "<<"Fish3"<<endl<<endl;
        for(int row=0; row<7; row++)
        {
                               
                cout<<"lake "<<row+1;
                for(int column=0; column<3; column++)
                {
                        Array_Info>>Array1[row][column];
                        cout<<setw(6)<<Array1[row][column]<<' ';
                }
                cout<<endl;
        }
        cout<<endl<<Colsums[1]<<endl;
}

---

These are the numbers (not all are used, only 21).
8 27 33 14 81 146 305
249 412 71 226 4 144 55
94 493 133 265 788 240
380 117 88 25 60

I output "Colsums[1]" to test to see if the sum was correct. It comes up with a wierd number.

>> reading the numbers from a file
You are reading in the numbers during the Print function, which isn't called until after the sums are calculated.

aww, i didn't even realize that. Thank you.

> void main()
*faints*

Quote:

---

> void main()
*faints*

---

http://faq.cprogramming.com/cgi-bin/...&id=1043284376

Was this intentional?

Code:

---

RowSums[row] = RowSums[column] + Array1[row][column];

---

To avoid that kind of problem/ambiguity, you can write it like this:

Code:

---

RowSums[row] += Array1[row][column];

---

You can do this at the variable's initialization:

Code:

---

int Colsums[3];

        for(column = 0; column < 3; column++)
                Colsums[column] = 0;

---

->

Code:

---

int Colsums[3] = {0, 0, 0};

---

If you leave off elements, 0 is implied, so you could use

Code:

---

int Colsums[3] = {0};

---

Or you could use memset (in <cstring>) instead of a for loop.

I don't think you use anything from <string>, nor <cmath> for that matter.