Two dimensional array calculation, Compute the average, - C Array

C examples for Array:Multidimensional Arrays

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Description

Two dimensional array calculation, Compute the average,

Demo Code

#include <stdio.h>
#define ROWS 3/* w w  w.  ja  v a  2s.  c o  m*/
#define COLUMNS 5

double compute_row_average(double array[COLUMNS]);
double compute_array_average(double (*array)[COLUMNS], int rows);
double largest_value(double (*array)[COLUMNS], int rows);

int main(void)
{
  double data[ROWS][COLUMNS];

  for (int i = 0; i < ROWS; i++)
  {
    printf("Enter set of %d doubles: ", COLUMNS);
    for (int j = 0; j < COLUMNS; j++)
    {
      scanf("%lf", data[i] + j);
    }
  }
  for (int i = 0; i < ROWS; i++)
  {
    printf("\tAverage for row %d: %.3f\n", i + 1, compute_row_average(data[i]));
  }
  printf("Average for entire array: %.3f\n", compute_array_average(data, ROWS));
  printf("Maximum array value: %.3f\n", largest_value(data, ROWS));
  return 0;
}

double compute_row_average(double array[COLUMNS])
{
  double total = 0;
  for (int i = 0; i < COLUMNS; i++)
    total += array[i];

  return total / COLUMNS;
}

double compute_array_average(double (*array)[COLUMNS], int rows)
{
  double total = 0;
  for (int i = 0; i < rows; i++)
    for (int j = 0; j < COLUMNS; j++)
      total += array[i][j];

  return total / (rows * COLUMNS);
}

double largest_value(double (*array)[COLUMNS], int rows)
{
  double max = array[0][0];
  for (int i = 0; i < rows; i++)
    for (int j = 0; j < COLUMNS; j++)
      if (array[i][j] > max)
        max = array[i][j];

  return max;
}

Result


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