Question

In Class Exercises 8-Arrays For the following exercises, assume an array is already populated, your job is to write a program that traverses the array. DO NOT HARD CODE the last index. In other words, you code for 1-4&6 should be able to handle the following 2 arrays: amp2 10 array1 [52, 63, 99, 71, 3.1] array2 - [99:-3: 45); For 5: wordArray1 wordArray2 ('number, 'arrays', 'indices', 'hello', finish' [number, 'different, 'finish? 1. Determine the sum of all the elements in an integer array named numbers. 2. Determine the sum of all the elements that have odd-numbered indices in an array named oddSum. Write a fragment of code that determines the difference between the largest and smallest elements in an integer array. Name the array difference. 3. Determine both the largest element in an integer array named largest. Now, swap the largest value with the last value in the array (this value will now be the last element). 4. Reverse an array such that the fist element is now the last, the last is now the first. The second element is now second to last, and the second to last is now second. Note that when traversing the array, you only need to go half the length. 5. Determine whether or not a String array named word contains the word Hello (ignore case). 6. Write a fragment of code to determine whether or not each grade is a passing grade (60 or above) in an integer array named testGrades.

using matlab

Answer 1

%we are supposed to do 1 question at a time. I have done 3. Please ask the remaining again

%1
%array name is numbers
sumNumbers=0;
for i=1:length(numbers)
    sumNumbers=sumNumbers+numbers(i);
end
fprintf('Sum of all the elements in numbers: %d\n',sumNumbers)

%2
%array name is oddSum
oddNumberedSum=0;
for i=1:2:length(oddSum)
    oddNumberedSum=oddNumberedSum+oddSum(i);
end
fprintf('Sum of all the odd indexed elements in oddSum: %d\n',oddNumberedSum)

%for finding difference between largest and smallest number, assuming the
%array name is integers
max_integers=integers(1);
min_integers=integers(1);
for i = 1:length(integers)
    if integers(i)>max_integers
        max_integers=integers(i);
    end
    if integers(i)<min_integers
        min_integers=integers(i);
    end
end
difference = max_integrs-min_integers;
fprintf('difference between largest and smallest element: %d\n',difference)

%5
contains=false;
for i = 1:length(word)
    if strcmpi(word{i},'Hello')
        contains=true;
        break;
    end
end
if contains
    fprintf('The array word contains the word Hello\n')
else
    fprintf('The array word does not contain the word Hello\n')
end