File 1: main.m repeat_process = 1 ; while repeat_process data1 = []; data2 = [];

Question

File 1:

main.m

repeat_process = 1;

while repeat_process

    data1 = [];

    data2 = [];

    random_choice = randi( [0 1], 1, 1);

    if random_choice

        data1 = randi ( [0 100], 1, 1 );

        data2 = randi ( [0 100], 1, 1 );

    else

        data1 = randi ( [0 100], 10, 10 );

        data2 = randi ( [0 100], 10, 10 );

    end

    user_operation_choice = input('Please select one of the following options: 1) Addition 2) Subtraction ');

    do_math(random_choice, user_operation_choice, data1, data2);

    repeat_process = input('Enter 1 to repeat. ');

end

File 2:

do_math.m

function do_math (math_type, user_operation_choice, data1, data2)

result = 0;

if math_type

    switch user_operation_choice

        case 1

            result = add_numbers(data1, data2);

        case 2

            result = subtract_numbers(data1, data2);

    end %end switch statement

else

    do_math_arrays(user_operation_choice, data1, data2);

    return;

end %end if-else statement

disp(result);

end %end function do_math

function n_sum = add_numbers(data1, data2);

n_sum = data1 + data2;

end %end function add_numbers

function n_sub = subtract_numbers(data1, data2);

n_sub = data1 - data2;

end %end function add_numbers

File 3:

do_math_arrays.m

function do_math_arrays (user_operation_choice, data1, data2)

result = 0;

    switch user_operation_choice

        case 1

            result = add_numbers(data1, data2)

        case 2

            result = subtract_numbers(data1, data2)

    end %end switch statement

end %end if-else statement

disp(result);

end %end function do_math_arrays

function array_sum = add_numbers(data1, data2)

array_sum = data1 + data2;

end %end function add_numbers

function array_sub = subtract_numbers(data1, data2)

array_sub = data1 - data2;

end %end function add_numbers

1)What value would the variable random_choice have to be for the add_numbers function from which file 2 to be called?

a.0

b.1

c.2

d.3

2)How many output arguments does the function do_math_arrays return?

a.0

b.1

c.2

d.3

Explanation / Answer

Hi,
1.To call do_math, the inputs should be integers rather than arrays, we are setting inputs here,

if random_choice

        data1 = randi ( [0 100], 1, 1 );

        data2 = randi ( [0 100], 1, 1 );

    else

        data1 = randi ( [0 100], 10, 10 );

        data2 = randi ( [0 100], 10, 10 );
hence if random_choice variable is 1, then only one random value between 1 and 100 is selected for data1 and data2
2.the function do_math_arrays doesnt return any output arguments, if it were to be returned it should be declared in form
function [y1,...,yN] = myfun(x1,...,xM)

this is the syntax to return y1,y2...yn o/p arguments

Thumbs up if this was helpful, otherwise let me know in comments

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