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From: Daniel Wells on 24 Jul 2010 02:02
Hey everybody, I've been referencing this forum for a while now for general help with programs but this is my first post. I've only take a single semester of a matlab class so not much experience but I'm trying to help one of my buddies write a program. I'm not having much success but I was hoping someone here could point me in the right direction. Here is the program in its entirety. Thanks.

% supercarcompare.m by PD(2010)
% Allows user to choose from 10 of the worlds best performing supercars
% and compare two cars at a time. Cars are compared by price, top speed
% 0-60 time, and horsepower.
% All information is sourced from www.supercars.org
clc
clear
car1 = [654400, 257, 2.7, 1183];
car2 = [17000000, 253, 2.5, 1001];
car3 = [555000, 248, 3.2, 750];
car4 = [545568, 245, 3.2, 806];
car5 = [970000, 240, 3.2, 627];
car6 = [670000, 217, 3.4, 660];
car7 = [650000, 217, 3.8, 542];
car8 = [667321, 215, 3.5, 650];
car9 = [430000, 211, 3.3, 640];
car10 = [440000, 205, 3.9, 612];
xbar = [1:4];
disp('Supercar Comparison Program by PD(2010)');
disp(char(10));
disp('This program will allow you to compare different supercars based on');
disp('horsepower, price, top speed, and 0-60 mph times. You will be able to');
disp('choose two cars at a time and their performance numbers will be shown');
disp('along with a graph showing their different attributes compared to each other.');
disp('Here are your choice of cars:');
disp('1. Shelby Ultimate Aero');
disp('2. Bugatti Veyron');
disp('3. Saleen S7');
disp('4. Koenigsegg CCX');
disp('5. McLaren F-1');
disp('6. Ferrari Enzo');
disp('7. Jaguar XJ 220');
disp('8. Pagani Zonda');
disp('9. Lamborghini Murcielago LP640');
disp('10. Porsche Carrera GT');
choice1 = input('Please select your first car to compare and enter 1-10. Enter 0 to end. ');
choice2 = input('Please select your second car to compare and enter 1-10. Enter 0 to end. ');
if choice1 ~= 0 || choice2 ~= 0
if choice1 >= 1 && choice1 <= 10
if choice1 == 1
disp('Price = $654,400');
disp('Top Speed = 257 mph');
disp('0-60 mph = 2.7 sec');
disp('Horsepower = 1183');
bar1 = bar(xbar,car1, 'FaceColor', 'k');
set(bar1, 'BarWidth', .5);
hold on;
elseif choice1 == 2
disp('Price = $1,700,000');
disp('Top Speed = 253 mph');
disp('0-60 mph = 2.5 sec');
disp('Horsepower = 1001');
bar1 = bar(xbar,car2, 'FaceColor', 'k');
set(bar1, 'BarWidth', .5);
hold on;
elseif choice1 == 3
disp('Price = $555,000');
disp('Top Speed = 248 mph');
disp('0-60 mph = 3.2 sec');
disp('Horsepower = 750');
bar1 = bar(xbar,car3, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 4
disp('Price = $545,568');
disp('Top Speed = 245 mph');
disp('0-60 mph = 3.2 sec');
disp('Horsepower = 806');
bar1 = bar(xbar,car4, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 5
disp('Price = $970,000');
disp('Top Speed = 240 mph');
disp('0-60 mph = 3.2 sec');
disp('Horsepower = 627');
bar1 = bar(xbar,car5, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 6
disp('Price = $670,000');
disp('Top Speed = 217 mph');
disp('0-60 mph = 3.4 sec');
disp('Horsepower = 660');
bar1 = bar(xbar,car6, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 7
disp('Price = $650,000');
disp('Top Speed = 217 mph');
disp('0-60 mph = 3.8 sec');
disp('Horsepower = 542');
bar1 = bar(xbar,car7, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 8
disp('Price = $667,321');
disp('Top Speed = 215 mph');
disp('0-60 mph = 3.5 sec');
disp('Horsepower = 650');
bar1 = bar(xbar,car8, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 9
disp('Price = $430,000');
disp('Top Speed = 211 mph');
disp('0-60 mph = 3.3 sec');
disp('Horsepower = 640');
bar1 = bar(xbar,car9, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
elseif choice1 == 10
disp('Price = $440,000');
disp('Top Speed = 205 mph');
disp('0-60 mph = 3.9 sec');
disp('Horsepower = 612');
bar1 = bar(xbar,car10, 'FaceColor', 'k');
set(bar1, 'Barwidth', .5);
hold on;
else fprintf('\nThat was not one of the choices. Please try again using 1-10 ONLY.');
disp('Here are your choice of cars:');
disp('1. Shelby Ultimate Aero');
disp('2. Bugatti Veyron');
disp('3. Saleen S7');
disp('4. Koenigsegg CCX');
disp('5. McLaren F-1');
disp('6. Ferrari Enzo');
disp('7. Jaguar XJ 220');
disp('8. Pagani Zonda');
disp('9. Lamborghini Murcielago LP640');
disp('10. Porsche Carrera GT');
choice1 = input('Please select your first car to compare and enter 1-10. Enter 0 to end. ');
end
else fprintf('\nThat was not one of the choices. Please try again using 1-10 ONLY.');
disp('Here are your choice of cars:');
disp('1. Shelby Ultimate Aero');
disp('2. Bugatti Veyron');
disp('3. Saleen S7');
disp('4. Koenigsegg CCX');
disp('5. McLaren F-1');
disp('6. Ferrari Enzo');
disp('7. Jaguar XJ 220');
disp('8. Pagani Zonda');
disp('9. Lamborghini Murcielago LP640');
disp('10. Porsche Carrera GT');
choice1 = input('Please select your second car to compare and enter 1-10. Enter 0 to end. ');
end
if choice2 >= 1 && choice2 <= 10
if choice2 == 1
disp('Price = $654,400');
disp('Top Speed = 257 mph');
disp('0-60 mph = 2.7 sec');
disp('Horsepower = 1183');
bar2 = bar(xbar,car1, 'FaceColor', 'k');
set(bar2, 'BarWidth', .5);
hold off;
elseif choice2 == 2
disp('Price = $1,700,000');
disp('Top Speed = 253 mph');
disp('0-60 mph = 2.5 sec');
disp('Horsepower = 1001');
bar2 = bar(xbar,car2, 'FaceColor', 'k');
set(bar2, 'BarWidth', .5);
hold off;
elseif choice2 == 3
disp('Price = $555,000');
disp('Top Speed = 248 mph');
disp('0-60 mph = 3.2 sec');
disp('Horsepower = 750');
bar2 = bar(xbar,car3, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 4
disp('Price = $545,568');
disp('Top Speed = 245 mph');
disp('0-60 mph = 3.2 sec');
disp('Horsepower = 806');
bar2 = bar(xbar,car4, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 5
disp('Price = $970,000');
disp('Top Speed = 240 mph');
disp('0-60 mph = 3.2 sec');
disp('Horsepower = 627');
bar2 = bar(xbar,car5, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 6
disp('Price = $670,000');
disp('Top Speed = 217 mph');
disp('0-60 mph = 3.4 sec');
disp('Horsepower = 660');
bar2 = bar(xbar,car6, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 7
disp('Price = $650,000');
disp('Top Speed = 217 mph');
disp('0-60 mph = 3.8 sec');
disp('Horsepower = 542');
bar2 = bar(xbar,car7, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 8
disp('Price = $667,321');
disp('Top Speed = 215 mph');
disp('0-60 mph = 3.5 sec');
disp('Horsepower = 650');
bar2 = bar(xbar,car8, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 9
disp('Price = $430,000');
disp('Top Speed = 211 mph');
disp('0-60 mph = 3.3 sec');
disp('Horsepower = 640');
bar2 = bar(xbar,car9, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
elseif choice2 == 10
disp('Price = $440,000');
disp('Top Speed = 205 mph');
disp('0-60 mph = 3.9 sec');
disp('Horsepower = 612');
bar2 = bar(xbar,car10, 'FaceColor', 'k');
set(bar2, 'Barwidth', .5);
hold off;
end
else fprintf('\nThat was not one of the choices. Please try again using 1-10 ONLY.');
disp('Here are your choice of cars:');
disp('1. Shelby Ultimate Aero');
disp('2. Bugatti Veyron');
disp('3. Saleen S7');
disp('4. Koenigsegg CCX');
disp('5. McLaren F-1');
disp('6. Ferrari Enzo');
disp('7. Jaguar XJ 220');
disp('8. Pagani Zonda');
disp('9. Lamborghini Murcielago LP640');
disp('10. Porsche Carrera GT');
choice2 = input('Please select your second car to compare and enter 1-10. Enter 0 to end. ');
end
else
fprintf('\nThank you for using The Supercar Comparison Program!');
end
From: Walter Roberson on 24 Jul 2010 06:20
Daniel Wells wrote:
> Hey everybody, I've been referencing this forum for a while now for
> general help with programs but this is my first post. I've only take a
> single semester of a matlab class so not much experience but I'm trying
> to help one of my buddies write a program. I'm not having much success
> but I was hoping someone here could point me in the right direction.
> Here is the program in its entirety. Thanks.

You did not describe the difficulties you are having.

An experienced Matlab user would likely find many _style_ points that
could use improvement.

In terms of outright bugs... trace what happens if the user enters a
non-zero value for choice1 but a 0 value for choice2. And re-examine the
following line:

choice1 = input('Please select your second car to compare and enter
1-10. Enter 0 to end. ');

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