So I decided a few days ago that I wanted to improve my C++ skills (specifically C++11). I found this wonderful website Projecteuler.net that has programming puzzles of a mathematical bent. Since I hate the programming assignments in most textbooks (I find writing tic-tac-toe games and sh1t like that tedious/boring) but really enjoy the small puzzles on this site.

Anyway, I'm really happy with this site so far, and just wanted to recommend it to others.

Thx for the sharing, amma check it up now

I'm doing the problems in decreasing order of difficulty (where difficulty is measured by how many people have done the problems already).

So...as much as I used to think C++ was a tedious/annoying language before, now I'm starting to like it better. The auto for loop allows you to iterate over a list like in Python, while the transform() function in the <algorithm> library is the equivalent of a map/list comprehension like in Python (well, nearly).

The only thing I'm really missing at this point from Python is pretty printing...super annoying how there is no pre-built way to convert vector to string for print purposes

I could of course write my own code to do this (and have done so), but would prefer if there was some prebuilt library I could just install/include.

Anyways, I've done 11 problems so far: http://grab.by/lDDO

Some sort of bug in my solution to "Largest Product in a Grid." Well, either a bug or me misunderstanding the problem statement. Will fix tomorrow.

ekt_bear: I'm doing the problems in decreasing order of difficulty (where difficulty is measured by how many people have done the problems already).

So...as much as I used to think C++ was a tedious/annoying language before, now I'm starting to like it better. The auto for loop allows you to iterate over a list like in Python, while the transform() function in the <algorithm> library is the equivalent of a map/list comprehension like in Python (well, nearly).

The only thing I'm really missing at this point from Python is pretty printing...super annoying how there is no pre-built way to convert vector to string for print purposes

I could of course write my own code to do this (and have done so), but would prefer if there was some prebuilt library I could just install/include.

Anyways, I've done 11 problems so far: http://grab.by/lDDO

Some sort of bug in my solution to "Largest Product in a Grid." Well, either a bug or me misunderstanding the problem statement. Will fix tomorrow.

convert vector to string..? you know that the string class is a subclass of vector

No I mean, rather than me writing:

string vec_to_string(vector<int> foo){
stringstream temp;
for (auto x: foo){
temp << x << " ";
}
return temp.str();
}

I just wish there was a header I could include that came by default in most Unix systems (or is easily installable, like Boost) that would do this.

Also, it doesn't appear that string is a subclass of vector.

ekt_bear: Also, it doesn't appear that string is a subclass of vector.

not exactly a subclass... string is defined as a typedef of a container type.. something like this :
namespace std {
typedef basic_string <char> string
}
where basic_string<T > is a template subclass of vector.
that's why you can use iterator on a string and if you check the string class methods, you will see the push_back()

ekt_bear: No I mean, rather than me writing:

string vec_to_string(vector<int> foo){
stringstream temp;
for (auto x: foo){
temp << x << " ";
}
return temp.str();
}

I just wish there was a header I could include that came by default in most Unix systems (or is easily installable, like Boost) that would do this.

you can use for_each() for this type of iteration, it takes a function pointer and a container and applies the function to each object in the container but since you said you are printing, why do you have to convert an int to a string before printing when you can just send it directly to stdout?

Two updates:

1. I've only done 15 problems. I'd like to at least get to 25 before the end of the month, 100 before the new year.
2. Switching to doing the problems in Python.

Just completed my 25th problem:

Congratulations, the answer you gave to problem 24 is correct.

You are the 47380th person to have solved this problem.

Nice work, ekt_bear, you've just advanced to Level 1.
51004 members (16.54%) have made it this far.

You have earned 1 new award:

The Journey Begins: Progress to Level 1 by solving twenty-five problems

Just started using NodeJS to solve it, till i switch to Python.

Heh Node is hot right now, but I hate javascript. So i've not learned it.

If you want to learn new programming language then you have to make your base or fundamental of programming clear which is the first step to move ahead. After making the base clear you can move high level language like .NET, JAVA, PHP etc whatever you want.

lordZOUGA:
convert vector to string..? you know that the string class is a subclass of vector

A String is not a subclass of a Vector class . .. not in C, C++, Java, .NET, or any of the other languages I know. You probably meant something else.

madelinekim: If you want to learn new programming language then you have to make your base or fundamental of programming clear which is the first step to move ahead. After making the base clear you can move high level language like .NET, JAVA, PHP etc whatever you want.

I disagree! You can start learning with any language out there, whether it be a high-level language, a pure language, hybrid or even low level languages like assembly and machine code. The main is to understand the basics of programming in general, and I am talking memory organization, control structures, procedures calls, types etc. Then you can learn basically any programming language in the world, in a matter of days, even.

Kobojunkie:

A String is not a subclass of a Vector class . .. not in C, C++, Java, .NET, or any of the other languages I know. You probably meant something else.

i explained what I meant below. a string is a container type in C++

lordZOUGA:
not exactly a subclass... string is defined as a typedef of a container type.. something like this :
namespace std {
typedef basic_string <char> string
}
where basic_string<T > is a template subclass of vector.
that's why you can use iterator on a string and if you check the string class methods, you will see the push_back()