非常大的数组 [英] Very big arrays
问题描述
您好，
我正在尝试用一些存储的值创建一个dll，希望在一个静态数组中存储数百万美元的b
这个：
双delta [x_size] [y_size] [z_size];
void delta_init（）{
delta [0 ] [0] [0] = 8.65;
delta [0] [0] [1] = 1.35;
delta [0] [0] [2] = 2.11;
delta [0] [0] [3] = 3.29;
delta [0] [0] [4] = 5.147;
等...
我正在尝试编译Visual C ++ Pro 2005下的代码，代码
就是这么做不编译 - 它运行超过10个小时，只需要手。我虽然
能够编译更小的数组。
如何编译代码？有什么更好的方法呢？
感谢您的建议。
Hello,
I''m trying to make a dll with some stored values, looking to store
several million doubles in a static array like this:
double delta[x_size][y_size][z_size];
void delta_init() {
delta[0][0][0] = 8.65;
delta[0][0][1] = 1.35;
delta[0][0][2] = 2.11;
delta[0][0][3] = 3.29;
delta[0][0][4] = 5.147;
etc ...
I''m trying to compile the code under Visual C++ Pro 2005, and the code
just does not compile - it runs over 10 hours and just hands there. I
was able to compile smaller arrays though.
How can I make the code compile? What is a better way to do this?
Thank you for your advice.
推荐答案
victorg ... @ gmail.com skrev：
victorg...@gmail.com skrev:
您好，
我是试图用一些存储的值创建一个dll，希望在这样的静态数组中存储几百万的双倍数：
double delta [x_size] [y_size ] [z_size];
void delta_init（）{
delta [0] [0] [0] = 8.65;
delta [0 ] [0] [1] = 1.35;
delta [0] [0] [2] = 2.11;
delta [0] [0] [3] = 3.29;
delta [0] [0] [4] = 5.147;
等...
我正在尝试编译Visual C ++ Pro 2005下的代码，而代码
只是不编译 - 它运行超过10个小时，只需动手。我虽然
能够编译较小的数组。
Hello,
I''m trying to make a dll with some stored values, looking to store
several million doubles in a static array like this:
double delta[x_size][y_size][z_size];
void delta_init() {
delta[0][0][0] = 8.65;
delta[0][0][1] = 1.35;
delta[0][0][2] = 2.11;
delta[0][0][3] = 3.29;
delta[0][0][4] = 5.147;
etc ...
I''m trying to compile the code under Visual C++ Pro 2005, and the code
just does not compile - it runs over 10 hours and just hands there. I
was able to compile smaller arrays though.
它必须是一个有数百万行的程序，然后呢？
It must be a program with millions of lines, then?
>
如何编译代码？有什么更好的方法呢？
感谢您的建议。
>
How can I make the code compile? What is a better way to do this?
Thank you for your advice.
技术上它还没有失败，但我不想打赌
编译最终会成功。但是你的问题是平台
具体，所以这里是偏离主题的。去参观一些你会想要讨论主题的小组 - 也许是microsoft.public.vc.language？
/ Peter
Technically it haven''t failed yet, but I don''t want to bet that the
compile will eventually succeed. But your question is platform
specific, so it is off-topic here. Go visit some group where you would
be on topic - perhaps microsoft.public.vc.language?
/Peter
vi********@gmail.com 写道：
您好，
我正在尝试用一些存储的值创建一个dll，想要存储
这样的静态数组中的数百万双：
双delta [x_size] [y_size] [z_size];
void delta_init（）{
delta [0] [0] [0] = 8.65;
delta [0] [0] [1] = 1.35;
delta [0] [0] [2] = 2.11;
delta [0] [0] [3] = 3.29;
delta [0] [0] [4] = 5.147;
等...
我正在尝试编译代码在Visual C ++ Pro 2005下，代码
只是不编译 - 它运行超过10个小时，只需要在那里。我虽然
能够编译更小的数组。
如何编译代码？有什么更好的方法呢？
感谢您的建议。
Hello,
I''m trying to make a dll with some stored values, looking to store
several million doubles in a static array like this:
double delta[x_size][y_size][z_size];
void delta_init() {
delta[0][0][0] = 8.65;
delta[0][0][1] = 1.35;
delta[0][0][2] = 2.11;
delta[0][0][3] = 3.29;
delta[0][0][4] = 5.147;
etc ...
I''m trying to compile the code under Visual C++ Pro 2005, and the code
just does not compile - it runs over 10 hours and just hands there. I
was able to compile smaller arrays though.
How can I make the code compile? What is a better way to do this?
Thank you for your advice.
大笑，10小时？为什么要在dll中存储值？你的程序可以使用的内存不会那么多吗？你需要在内存中加载吗？
您是否考虑过将这些存储在一个文件或多个文件中？或者
可能会开发一个算法来初始化值？你是否意识到数组需要连续内存？
？为什么不在struct / class中存储相关的
值，而是存储
struct / class的实例？
如果我必须存储积分，例如，使用x，y和az：
#include< iostream>
#include< ; ostream>
#include< vector>
#include< deque>
template< typename T>
struct Point
{
// universal ctor
Point（const T& x_ = T（），
const T& y_ = T（），
const T& z_ = T（））
：x（x_ ），y（y_），z（z_）{}
//复制ctor
Point（const Point& copy）
{
x = copy.x;
y = copy.y;
z = copy.z;
}
私人：
T x，y，z;
};
int main（）{
//一百万分为双打，全部设为0.0
std :: deque<点<双倍容器（1000000）; //完成
std :: cout<< double container的大小=" ;;
std :: cout<< dcontainer.size（）* sizeof（Point< double>）;
std :: cout<< std :: endl;
//作为花车的百万分，全部设为0.0
std :: deque<点< float fcontainer（1000000）;
std :: cout<< float container的大小=" ;;
std :: cout<< fcontainer.size（）* sizeof（Point< float>）;
std :: cout<< std :: endl;
返回0;
}
此平台上的
/ *输出：
双容器'的大小= 24000000 // 24 MB
浮动容器'的大小= 12000000 // 12 MB
* /
lol, 10 hours? Why would you store values in a dll? Wouldn''t that eat
away at memory available to your program - dll must be loaded in mem?
Have you considered storing these in a file or several files? Or
perhaps develop an algorithm to initialize the values? Do you realize
that an array requires contiguous memory? Why don''t you store related
values together in a struct/class and store instances of the
struct/class instead?
If i had to store points, for example, with an x, y and a z:
#include <iostream>
#include <ostream>
#include <vector>
#include <deque>
template< typename T >
struct Point
{
// universal ctor
Point(const T& x_ = T(),
const T& y_ = T(),
const T& z_ = T())
: x(x_), y(y_), z(z_) { }
// copy ctor
Point(const Point& copy)
{
x = copy.x;
y = copy.y;
z = copy.z;
}
private:
T x, y, z;
};
int main() {
// one million Points as doubles, all set to 0.0
std::deque< Point< double dcontainer(1000000); // done
std::cout << "double container''s size = ";
std::cout << dcontainer.size() * sizeof(Point< double >);
std::cout << std::endl;
// one million Points as floats, all set to 0.0
std::deque< Point< float fcontainer(1000000);
std::cout << "float container''s size = ";
std::cout << fcontainer.size() * sizeof(Point< float >);
std::cout << std::endl;
return 0;
}
/* output on this platform:
double container''s size = 24000000 // 24 MB
float container''s size = 12000000 // 12 MB
*/
vi ** ******@gmail.com 写道：
你好，
我是试图用一些存储的值创建一个dll，希望在这样的静态数组中存储几百万的双倍数：
Hello,
I''m trying to make a dll with some stored values, looking to store
several million doubles in a static array like this:
假设sizeof（双倍）== 8，几百万双打
可能占据几十MB。你真的想要一个
大的dll？
Assuming sizeof(double)==8, several million doubles will
likely occupy several tens of MB. You really want a dll that
big?
double delta [x_size] [y_size] [z_size];
void delta_init（）{
delta [0] [0] [0] = 8.65;
delta [0] [0] [1] = 1.35;
delta [0] [0] [2] = 2.11;
delta [0] [0] [3] = 3.29;
delta [0] [0] [4] = 5.147;
等...
我正在尝试编译下的代码Visual C ++ Pro 2005，以及代码
只是不编译 - 它运行超过10个小时，只需动手。我虽然
能够编译较小的数组。
double delta[x_size][y_size][z_size];
void delta_init() {
delta[0][0][0] = 8.65;
delta[0][0][1] = 1.35;
delta[0][0][2] = 2.11;
delta[0][0][3] = 3.29;
delta[0][0][4] = 5.147;
etc ...
I''m trying to compile the code under Visual C++ Pro 2005, and the code
just does not compile - it runs over 10 hours and just hands there. I
was able to compile smaller arrays though.
看看硬盘灯，也许编译器耗尽了内存并开始颠簸？
Take a look at the HDD light, perhaps the compiler ran out of
memory and started thrashing?
如何编译代码？有什么更好的方法呢？
感谢您的建议。
How can I make the code compile? What is a better way to do this?
Thank you for your advice.
究竟什么不允许你从文件中读取这些数据？
HTH，
- J.
What exactly disallows you to read this data from a file?
HTH,
- J.
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