如何在C++中更改为另一个目录？

#include<iostream>
#include <unistd.h>

int main() {
    int result = chdir("/path/to/new/directory");
    if (result == 0) {
        std::cout << "Successfully changed directory."<< std::endl;
    } else {
        std::cout << "Failed to change directory."<< std::endl;
    }
    return 0;
}