displaying 2D array correctly

[whaddupjustin]

Hello fellow programmers. I am trying to display a 2D array that displays randomly generated numbers that fill out in rows and columns. At the end of each row it should have the total and average displayed. I have written up all of the code and it compiles. I am not asking for the whole solution. Trust me, I have done my own work. I simply can't get the columns to display. I just have one long row. I have a header and tester file. Here is what my header file looks like. The area that I need help with is the function called "void MultiArray::display()"

This is my code.

#include <iostream>
#include <iomanip>
#include <cstdlib> // Needed to use rand() and srand()
#include <time.h> // Needed for time functions

using namespace std;

const int ROWSIZE = 10; // Number of elements in the array
const int COLSIZE = 5;

class MultiArray

{
private:

int data[ROWSIZE][COLSIZE]; // Array holding SIZE double values

public:

MultiArray(); // Constructor. Initialize all elements of data[] to 0

void randomFill();
int getRowSize();
int getColSize();
int getTotal();
int getRowTotal(int r);
double getAvg();
double getRowAvg(int r);
int getLargest();
int getSmallest();
int countValues (int lowRange, int highRange);
bool isNumberFound(int someNumber);
void display();

};

//********************implement functions here*******************

//constructor. fills data[] array with 0s
MultiArray :: MultiArray()
{
for (int r = 0; r < ROWSIZE; r++)
{
for (int c = 0; c < COLSIZE; c++)
{
data[r][c] = 0;
}
}
}

void MultiArray::randomFill()
{
//seed the random number generator
srand(static_cast<unsigned int>(time( NULL )));

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
data[r][c] = rand() % 101;
}
}
}

int MultiArray::getRowSize()
{ return ROWSIZE; }

int MultiArray::getColSize()
{ return COLSIZE; }

int MultiArray::getTotal()
{
int sum = 0;

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
sum += data[r][c];
}
}

return sum;
}

int MultiArray::getRowTotal(int r)
{
int sum = 0;
for(int r = 0; r < ROWSIZE; r++)
{
sum += data[r][0];
}
return sum;
}

double MultiArray::getAvg()
{
double average = 0.0;
double sum = 0.0;

for (int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
sum += data[r][c];
average = sum/(ROWSIZE+COLSIZE);
}
}

return average;
}

double MultiArray::getRowAvg(int r)
{
double average = 0.0;
double sum = 0.0;

for (int r = 0; r < ROWSIZE; r++)
{
sum += data[r][0];
average = sum/(ROWSIZE);
}

return average;
}

int MultiArray::getLargest()
{
int max = data[0][0];

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
if(data[r][c] > max)
max = data[r][c];
}
}

return max;
}

int MultiArray::getSmallest()
{
int min = data[0][0];

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
if(data[r][c] < min)
min = data[r][c];
}
}

return min;
}

int MultiArray::countValues(int lowRange, int highRange)
{
int amount = 0;

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
if((data[r][c] >= lowRange) && (data[r][c] <= highRange))
amount++;
}
}

return amount;
}

bool MultiArray::isNumberFound(int someNumber)
{
bool found = false;

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
if (data[r][c] == someNumber)
found = true;
}
}

return found;
}

void MultiArray::display()
{
//your code goes here to display the array

for(int r = 0; r < ROWSIZE; r++)
{
for(int c = 0; c < COLSIZE; c++)
{
cout << "[" << r << "]" << data[r][c] << endl;
}
}

}


And this is my code that gets generated:

Exam Scores
-----------
[0]75
[0]55
[0]55
[0]9
[0]95
[1]23
[1]60
[1]90
[1]52
[1]85
[2]90
[2]57
[2]81
[2]59
[2]61
[3]51
[3]7
[3]74
[3]22
[3]72
[4]72
[4]68
[4]28
[4]59
[4]19
[5]78
[5]59
[5]16
[5]47
[5]1
[6]40
[6]1
[6]75
[6]76
[6]58
[7]78
[7]12
[7]92
[7]2
[7]24
[8]1
[8]86
[8]76
[8]63
[8]57
[9]3
[9]27
[9]73
[9]80
[9]91


The minimum value is : 1
The maximum value is : 95
The total is : 2635
The average is : 175.7
The number of A's : 5

Sorry, you DO NOT have a perfect exam score!

Would you like to try again? (Y/N):


*****The output that should be displayed is like this:

Exam Scores
-----------
[0] 67 81 50 29 27 Total:254 Avg:50.8
[1] 58 4 0 6 37 Total:105 Avg:21
[2] 29 4 85 50 12 Total:180 Avg:36
[3] 88 50 38 51 44 Total:271 Avg:54.2
[4] 7 64 67 52 32 Total:222 Avg:44.4
[5] 97 2 28 76 43 Total:246 Avg:49.2
[6] 82 82 99 53 0 Total:316 Avg:63.2
[7] 69 47 36 19 54 Total:225 Avg:45
[8] 33 23 88 61 86 Total:291 Avg:58.2
[9] 45 51 75 92 45 Total:308 Avg:61.6
The minimum value : 0
The maximum value : 99
The total is : 2418
The average is : 48.36
Number of A's : 3
Sorry, you DO NOT have a perfect exam score.
Do you want to try again? (Y or N)




Any help is very much appreciated.
Thank you.

[blueberry]

Welcome to Cplusplus!

First off, code tags!

void MultiArray::display()
{

for(int r = 0; r < ROWSIZE; r++)
{
  int total=0;
  cout << '[' << r<< ']';
    for(int c = 0; c < COLSIZE; c++)
    {
    cout << data[r][c];// no << endl; here
    total+=data[r][c];
    }
  cout << " total: "<<total<<" average: " <<(float)(total/ROWSIZE)<<endl;
}

}

[whaddupjustin]

That helps me a lot. But I feel like my professor wants us to use the functions "getRowTotal" and "getRowAvg" inside our display function to show the total and average.

is that even possible?


Thank you.

[blueberry]

Yep it is.

Just think about it a little, I'll leave it to you to figure it out.

Just think about what result the function gives you, and where you want this result to be outputted.