Project Euler 1

[AustinB]

Just a quick question hoping to get it answered quickly

 

How many characters is in the answer of Project Euler 1?

My current total has 8 Characters in it,

[ThreePinkApples]

6

 

(Did it two days ago  )

[AustinB]

6

 

(Did it two days ago  )

Thanks...

Probably shouldn't Write the total to the Console every time...

[AustinB]

Thanks...

Probably shouldn't Write the total to the Console every time...

Took a break off of this, and decided to try again.

I'm sure theirs nothing wrong with this: (C++)

#include <iostream>using namespace std;int main(){    int sum, upto, c;    upto = 1000;    for (c = 0; c <= upto; c++){        if (c % 3 == 0 || c % 5 == 0){                // Save that nanoseconds worth of time.            if (c % 3 == 0 && c % 5 == 0) {                sum = sum + c;                cout << "3 & 5 are multiples of " << c << endl;            } else {                if (c % 3 == 0)                {                    sum = sum + c;                    cout << "3 is a multiple of " << c << endl;                }                if (c % 5 == 0)                {                    sum = sum + c;                    cout << "5 is a multiple of " << c << endl;                }            }        } else {            cout << c << " Checked." << endl;        }    }    cout << sum << endl;    return 0;}

[fizzlesticks]

 

                sum = sum + (c * 2);

Why multiply by 2 here?

[AustinB]

Why multiply by 2 here?

Because 3 & 5 would be multiples, will try without.

Edit: Still wrong will edit above post.

[fizzlesticks]

Because 3 & 5 would be multiples, will try without.

Edit: Still wrong will edit above post.

You never initialize sum to 0, depending on your compiler that could be the problem, without the *2 it comes up with the correct solution for me.

[AustinB]

You never initialize sum to 0, depending on your compiler that could be the problem, without the *2 it comes up with the correct solution for me.

I initialized the sum and removed the *2, I'm assuming that I'm much closer to the answer (234168).

Not sure what could be wrong at the moment.

[fizzlesticks]

I initialized the sum and removed the *2, I'm assuming that I'm much closer to the answer (234168).

Not sure what could be wrong at the moment.

You changed

for (c = 0; c < upto; c++){

to

for (c = 0; c <= upto; c++){

it was right the first time.

[AustinB]

You changed

for (c = 0; c < upto; c++){

to

for (c = 0; c <= upto; c++){

it was right the first time.

Aye, Thanks

Just realized that, the code above could be compacted to 20 lines. ...

Edited October 13, 2014 by AustinB