How to make a folder/directory

Question

How do I make a directory/folder with c++. I\'ve tried to use the mkdir() without success. I want to write a program that cin\'s a variable and then uses this variable to create

Answer 1

You need to #include <string>, the std::string operators are defined in that header.

The result of the expression newFolder + dir[i] is a std::string, and mkdir() takes a const char*. Change to:

mkdir((newFolder + dir[i]).c_str());

Check the return value of mkdir() to ensure success, if not use strerror(errno) to obtain the reason for failure.

This accesses beyond the end of the array dir:

for (int i = 0; i<=5; i++){
    mkdir(newFolder + dir[i]);

there are 5 elements in dir, so legal indexes are from 0 to 4. Change to:

for (int i = 0; i<5; i++){
    mkdir(newFolder + dir[i]);

Usestd::string for newFolder, rather than char[20]:

std::string newFolder;

Then you have no concern over a folder of more than 19 characters (1 required for null terminator) being entered.