向量 <char> 用零到字符串

Question

I have a

vector<char> sectionData;

and I would like to see its content.I try the following

string sectionDataStr = string(sectionData.begin(),sectionData.end());

But I get only part of the sectionData presented in the string,since sectionData contains zeros.What can I do,if any case I want to read entire data to string?

I can`t use std::cout Thanks

Answer 1

Your problem doesn't exist. Here's a simple demonstration:

#include <string>
#include <iostream>

int main()
{
    std::cout << std::string { 'a', '\0', 'b', '\0', 'c' } << std::endl;
}

Now inspect the output:

$ ./a.out | hexdump -C

00000000  61 00 62 00 63 0a 

##         a \0  b \0  c \n

As you can see, it's all there.

---

Alternatively (following your edit):

#include <cstdio>

std::fwrite(sectionDataStr.data(), sectionDataStr.size(), stdout);

Answer 2

Your problem is not with the string, but with the output. Depending on what you use, the output routine may stop at the first 0 in your string. If you don't want that, then you might need to convert the buffer for output using something like:

std::replace( sectionData.begin(), sectionData.end(), '\0', ' ' )