Multidimensional Array (HELP)

Projects Programming
1

How can I program this one?
what are the codes needed?

Input: 4x4 integer array
Output :
a) Difference of highest and lowest element in each column (array)
b)Average of all even nos in each row (array)

2

A multidimensional array is declared like this:

char myArray[4][4];
3

If this is a homework assignment, you may need to spend some time with it, but I think it works:

#define RANK  4

int array[RANK][RANK] = {
  { 1,  2,  3,  4},
  { 5,  6,  7,  8},
  { 9, 10, 11, 12},
  {13, 14, 15, 16}
};

int colDifference[4];
float evenAverage[4];

void setup() {
  // put your setup code here, to run once:
  int i;
  
  Serial.begin(9600);
  FindColumnDifferences();
  FindEvenAverages();

  Serial.println("The min-max by column:");
  for (i = 0; i < RANK; i++)
    Serial.println(colDifference[i]);
    
  Serial.println("The even number row average:");
  for (i = 0; i < RANK; i++)
    Serial.println(evenAverage[i]);

    
}

void FindColumnDifferences()
{
  int min = array[0][0];
  int max = array[0][0];
  int i = 0;
  int j = 0;

  while (j < RANK) {
    for ( ; i < RANK; i++) {
      if (array[i][j] <= min) {
        min = array[i][j];
      }
      if (array[i][j] >= max) {
        max = array[i][j];
      }
    }
    colDifference[j] = max - min;
    j++;
    i++;
  }
}

void FindEvenAverages()
{
  float sum;
  float denom;
  int i = 0;
  int j = 0;

  denom = RANK / 2.0;
  for (i = 0; i < RANK; i++) {    // Look through all rows
    sum = 0.0;
    for (j = 0; j < RANK; j += 2) {
      sum += (float) array[i][j];
    }
    evenAverage[i] = sum / denom; 
  }
}
void loop() {
  // put your main code here, to run repeatedly:
}

Be warned there are likely more elegant solutions.

4

How can I program this one?
what are the codes needed?

Input: 4x4 integer array
Output :
a) Difference of highest and lowest element in each column (array)
b)Average of all even nos in each row (array)

5

How can I program this one?

All by yourself. The homework hotline closed.

6

ronaldmill:
How can I program this one?
what are the codes needed?

Input: 4x4 integer array

Create initialized array with some integer values:

int input[4][4]={
  {1,2,3,4},
  {1,2,3,4},
  {1,2,3,4},
  {1,2,3,4},
}

ronaldmill:
Output :
a) Difference of highest and lowest element in each column (array)
b)Average of all even nos in each row (array)

  1. Use for-loops to create/find values that you want!
  2. Use "Serial" for sending values to the serial monitor!
7

See duplicate thread