English 中文(简体)
使用点子将双倍分解成果园?
原标题:Break double into chars using pointers?

我能否把一个点子放在“条码”(<>条/条码>)的两倍上,然后使用这个点子把双倍打成 by子?

这里的例子有:

double data;
double *dblPoint = &data;
unsigned char *bytePoint = (unsigned char *)dblPoint;
unsigned char byteArray[sizeof (double)];
unsigned int i;

for(i = 0; i < sizeof(double); i++) {
    byteArray[i] = *(bytePoint + i);
}

<条码> 其后,通过紫外线转轨机向另一台计算机转播(<>条码>接收<>。 载有新数据:

unsigned char bytesReceived[sizeof (double)];

double reconstData;
double *newDblPoint;
unsigned int i;

newDblPoint = bytesReceived;
reconstData = *dblPoint;

因此,在所有这一切之后,<代码>数据 == reconstData?

最佳回答

你的第一个例子可以简化为:

double data;
unsigned char bytesReceived[sizeof double];
memcpy ( bytesReceived, &data, sizeof data);

你的第二个例子无效:缓冲

unsigned char bytesReceived[sizeof double];

不一定在“双重”边界上统一,因此投下者

newDblPoint = bytesReceived;
reconstData = *dblPoint;

将试图参考一个不结盟的点。

问题回答

是的,你基本上可以这样做。 值得注意的一个问题是,如果两台机器没有同样的终点,那么你就需要扭转一边的封锁。





相关问题
Fastest method for running a binary search on a file in C?

For example, let s say I want to find a particular word or number in a file. The contents are in sorted order (obviously). Since I want to run a binary search on the file, it seems like a real waste ...

Print possible strings created from a Number

Given a 10 digit Telephone Number, we have to print all possible strings created from that. The mapping of the numbers is the one as exactly on a phone s keypad. i.e. for 1,0-> No Letter for 2->...

Tips for debugging a made-for-linux application on windows?

I m trying to find the source of a bug I have found in an open-source application. I have managed to get a build up and running on my Windows machine, but I m having trouble finding the spot in the ...

Trying to split by two delimiters and it doesn t work - C

I wrote below code to readin line by line from stdin ex. city=Boston;city=New York;city=Chicago and then split each line by ; delimiter and print each record. Then in yet another loop I try to ...

Good, free, easy-to-use C graphics libraries? [closed]

I was wondering if there were any good free graphics libraries for C that are easy to use? It s for plotting 2d and 3d graphs and then saving to a file. It s on a Linux system and there s no gnuplot ...

Encoding, decoding an integer to a char array

Please note that this is not homework and i did search before starting this new thread. I got Store an int in a char array? I was looking for an answer but didn t get any satisfactory answer in the ...

热门标签