Thread: Multi-D array. daily max/min/avg, weekly max/min/avg, sum total (99% done)

Hey guys,

I've spent all day working on this and I can't seem to figure the rest out.

Using this array:

int[][] temperatures = {
{ 73, 71, 68, 69, 69, 77, 78 },
{ 76, 73, 72, 72, 75, 79, 76 },
{ 79, 82, 84, 84, 81, 78, 78 },
{ 75, 72, 68, 69, 65, 63, 63 }};

I need to write a program that provides the following output:

a) The average temperature for each week.
b) The average temperature for each day.
c) The high and low temperature for each week.
d) The high and low temperature for each day.
e) The average temperature of all the temperatures.


PROBLEM:
So far everything works except for C and D. Both are not giving me the correct "max" and "min" for per week or per day.

The output I'm getting is this:

Week 1 average temperature is 72.
Week 2 average temperature is 74.
Week 3 average temperature is 80.
Week 4 average temperature is 67.

Day 1 average temperature is 75.
Day 2 average temperature is 74.
Day 3 average temperature is 73.
Day 4 average temperature is 73.
Day 5 average temperature is 72.
Day 6 average temperature is 74.
Day 7 average temperature is 73.

Week 1 highest temperature is 78.
Week 1 lowest temperature is 73.
Week 2 highest temperature is 79.
Week 2 lowest temperature is 76.
Week 3 highest temperature is 84.
Week 3 lowest temperature is 81.
Week 4 highest temperature is 84.
Week 4 lowest temperature is 81.

Day 1 highest temperature is 79.
Day 1 lowest temperature is 73.
Day 2 highest temperature is 82.
Day 2 lowest temperature is 71.
Day 3 highest temperature is 84.
Day 3 lowest temperature is 68.
Day 4 highest temperature is 84.
Day 4 lowest temperature is 68.
Day 5 highest temperature is 84.
Day 5 lowest temperature is 65.
Day 6 highest temperature is 84.
Day 6 lowest temperature is 63.
Day 7 highest temperature is 84.
Day 7 lowest temperature is 63.

Total sum of the array is 2069.

I believe it's because I have a value that appears more than once in a row and/or column. I've updated my code to include "greater than or equal to" and "less than or equal to" but it's still not working.

public class ArrayExample 
{
	public static void main(String[] args)
	{
		int[][] temperatures = {
									{ 73, 71, 68, 69, 69, 77, 78 },
									{ 76, 73, 72, 72, 75, 79, 76 },
									{ 79, 82, 84, 84, 81, 78, 78 },
									{ 75, 72, 68, 69, 65, 63, 63 }};
		//This give me the weekly average.
		int row,column,total;
		int week = 1;
		for(row = 0;row < temperatures.length;row++)
			{  
				total = 0;
				int average = 0;
				for(column = 0;column < temperatures[row].length;column++)
					{
						total = total + temperatures[row][column];
					}
						average = total / temperatures[row].length;
						System.out.println("Week "+week+" average temperature is " + average + ".");
						week++;
			}
 
	 	System.out.println();
 
	 	//This gives me the daily average.
		int day = 1;
		for(column = 0;column < 7;column++)
			{  
				total = 0;
				int average = 0;
				for(row = 0;row < temperatures.length;row++)
 
						total = total + temperatures[row][column];
 
						average = total / temperatures.length;
						System.out.println("Day "+ day +" average temperature is "+ average + ".");
						day++;
			}
 
		System.out.println();
 
		//This gives highest and lowest temperatures for each week.
		int week2 = 1;
		int highest = temperatures[0][0];
		int lowest = temperatures[0][0];
		for(row = 0;row < temperatures.length;row++)
			{  
				total = 0;
				for(column = 0;column < temperatures[row].length;column++)
					{
						if(temperatures[row][column] >= highest)
							highest = temperatures[row][column];
						else if (temperatures[row][column] >= lowest)
							lowest = temperatures[row][column];
 
					}
						System.out.println("Week "+week2+" highest temperature is " + highest + ".");
						System.out.println("Week "+week2+" lowest temperature is " + lowest + ".");
						week2++;
			}	
 
	 	System.out.println();
 
	 	//This gives highest and lowest temperatures for each day.
		int day2 = 1;
		int highest2 = temperatures[0][0];
		int lowest2 = temperatures[0][0];
		for(column = 0;column < 7;column++)
			{  
				for(row = 0;row < temperatures.length;row++)
 
						if (temperatures[row][column] > highest2)
							highest2 = temperatures[row][column];
						else if (temperatures[row][column] < lowest2)
							lowest2 = temperatures[row][column];
 
						System.out.println("Day "+ day2 +" highest temperature is "+ highest2 + ".");
						System.out.println("Day "+ day2 +" lowest temperature is "+ lowest2 + ".");
						day2++;
			}
 
		System.out.println();
 
		//This gives me the total sum of the array.
		int total2 = 0;
		for(row = 0;row < temperatures.length;row++)
				{  
					for(column = 0;column < temperatures[row].length;column++)
					total2 = total2 + temperatures[row][column];
				}
					System.out.println("Total sum of the array is " + total2 + ".");
		}
}