c++ - 在 C++ 中将字符数组添加到常量字符数组的正确方法是什么？

Question

在 C++ 中将字符数组添加到常量字符数组的正确方法是什么？

#include <iostream>
using namespace std;

int main(int argc, char** argv) {
    int pathSize = 0;
    char* pathEnd = &argv[0][0];
    while(argv[0][pathSize] != '\0') {
        if(argv[0][pathSize++] == '/')
            pathEnd = &argv[0][0] + pathSize;
    }
    pathSize = pathEnd - &argv[0][0];
    char *path = new char[pathSize];
    for(int i = 0; i < pathSize; i++)
        path[i] = argv[0][i];
    cout << "Documents Path: " << path + "docs/" << endl; // Line Of Interest
    delete[] path;
    return 0;
}

This code outputs: Documents Path: �\Using 'path' instead of '*path' will give me the compile error: invalid operands of types ‘char*’ and ‘const char [6]’ to binary ‘operator+’

Answer 1

我可以建议使用 C++ 开始，然后(提升)文件系统以获得最大 yield :

#include <iostream>
#include <boost/filesystem.hpp>
using namespace std;
using namespace boost::filesystem;

int main(int argc, const char *argv[])
{
    const std::vector<std::string> args { argv, argv+argc };

    path program(args.front());
    program = canonical(program);
    std::cout << (program.parent_path() / "docs").native();
}

这将使用平台的路径分隔符，了解如何翻译“有趣”的路径(例如包含 ..\..\ 或 UNC 路径)。