Anybody good with C++?

Is anybody here experienced with C++

Im given the following values but what is the e all about in purple?

color is 2
black is 2.5
crayon is -1.3
straw is 1
red is 3
purple is 0.3e+1

 

Mech Engineering,

Its for a comp science class, and so far im having a lil trouble getting the jist of C ++

 

I think this might be your answer. That looks like the output of a c++ program that would be similar to the output from a calculator.

http://answers.yahoo.com/question/index?qid=20081115194643AACOqEi

 

I am a junior in ME but I've never heard of C++

 

see i know it on a calculator as being raised to a ^10 power but i just dont know if its the same on C++ because im reading through the book (where i cant find a refrence to the e) and % represents almost the same thing as subtraction aparently

 

I'm a sophmore, and maybe youve used MatLab, which ive used a little bit before and it seems very similar to that

 

Ohhh yes good ol' matlab, yeah the e is like the big E on a calculator. Now why they have it like e+1 is beyond me, its really not needed.

 

Gotta be something else, given that 0.3e+1 (scientific notation) translated to decimal is 0.0000059049
Doesn't look like a color value.

Edit....

Screwed that one... the value is 3

 

in matlab is the % sign represent what you would normally think of as a percenct of something

 

Assume that you have the following variable declarations:

int color, lime, straw, yellow, red, orange;
float black, white, green, blue, purple, crayon;

Evaluate each of the statements below given the following values:
color is 2
black is 2.5
crayon is -1.3
straw is 1
red is 3
purple is 0.3e+1
Write your answer in the form: variable is assigned value

white = color * 2.5 / purple;
green = color / purple;
orange = color / red;
blue = (color + straw) / (crayon + 0.3);
lime = red / color + red % color;
purple = straw / red * color;

 

^ this is the entire question

 

Sorry...I could school you in some Python or Java. I've only taken one C++ class but that was eons ago

 

Consistency.

It prevents the "e" from being confused as a variable.

0.3e+1 is a different number than 0.3e-1
0.3e+1 merely happens to be the even power of 10

 

Well in matlab I would set this up but first defining the colors to those values, then write a simple code to do those multiplications/divisions.
And the % does not mean percentage of something, I think its part of the coding to name what the program is going to do for you.

 

so in any math enviroment when e is subtracted by 1, its to the negative 10th power. And if e has one added then it is to the positive 10th power?

can it have a greater number added or subtract than 1?

Thanks again

 

Yes it is used a lot when the number is really big or small. Say you have .00045 which also can be wrote as 4.5E-4. The same for big numbers such as modulus of elasticity which are on the number of E+9 (GPa). Its pretty much saying how many zeroes are before or after the decimal

 

Yes... the number after the "e" indicates the power.
The "e(x)" replaces "*10^(x)"
e+4 = *10^(4)
e-4 = *10^(-4)
e+100 = *10^(100) (BTW: That is a Google)
e-100 = *10^(-100)

 

I ran the calcs manually and ended up coming up with purple = orange.... and neither = 0.3e+1 (which we know purple=), so the correct answer does not appear to involve a simple mathematic solution using numerical substitution for known variables.


But it's been about 30 years since I've used scientific notation or any calculus, and my most advanced programming experience is limited to dBase-III and QuickBasic.

 

I've had C++, but it's been years.

I think he/she wants you to plug those into a compiler and try and learn about order of operations and types. Note the two different types or integers and floating point. Doing math on mixed types will work, but it might not give you what you expect.

The % is a math function for remainders. http://www.cprogramming.com/tutorial/modulus.html

The 0.3e+1 is shorthand scientific notation for 0.3 x 10^1 which is 0.3, I think.

Edit:
http://codepad.org/gYsqDTGV
I had to relearn printf. Long time ago.

 

Yeah you're right I should have been more clear

white = color * 2.5 / purple;
green = color / purple;
orange = color / red;
blue = (color + straw) / (crayon + 0.3);
lime = red / color + red % color;
purple = straw / red * color;

I would define the colors to the values given in the problem then ask the program to do these and see what it came up with.
I am terrible at explaining things, especially over typing