[英]Read all vector elements as one integer in C++
I have this deque and this vector:我有这个双端队列和这个向量:
std::deque<uint8_t> Time(3);
std::vector<uint8_t> deque_buffer(3);
I do some push_backs
:我做了一些
push_backs
:
Time.push_back(1);
Time.push_back(2);
Time.push_back(3);
I copy the data to the vector
我将数据复制到
vector
for(int i=0; i<3; i++)
{
deque_buffer.at(i) = Time.at(i);
}
I want to read all the vector data and store it into an int
.我想读取所有矢量数据并将其存储到
int
中。 Meaning I want 0x010203
to be interpreted as 66051
.意思是我希望
0x010203
被解释为66051
。 How do I do it?我该怎么做?
Here is what you can do: (sample code on how to "merge" vector elements).这是您可以执行的操作:(有关如何“合并”矢量元素的示例代码)。
#include <iostream>
#include <vector>
using namespace std;
int main()
{
vector<unsigned char> vec = {1,2,3};
int res = 0;
for (const auto &val:vec)
{
res = (res << 8 ) | val;
}
printf ("0x%x\n",res);
printf ("%d\n",res);
return 0;
}
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