How to insert the value of a variable into the path (MkDir)?

Question

linux

I decided to get rid of the annoying routine, and as you know, laziness is the engine of progress. Since I am new to programming in C++, and even more so under Linux, I chose standard notepad and g++ for work. And then a problem arose - notepad creates temporary files (they are not visible graphically, but there are too many of them in the terminal, which confuses). I also decided to add the ability to create new projects (folder + file attached to it) to the program. I found it I can’t do it, but I can’t implement it in practice. Maybe seasoned programmers will tell the beginner how to insert the value of the variable into the path.
Below is a piece of code from the instructions:

#include <sys/types.h>
#include <sys/stat.h>
int status;
...
status = mkdir("/home/cnd/mod1");

And this is my code:

cout<<"Enter name project=";
cin>>name;
path= MkDir("/home/Work/cpp/???");

Answer 1

In C++, a little shorter:

#include <string>
#include <iostream>
#include <stdlib.h>

#include <sys/stat.h>
#include <sys/types.h>

int main()
{
  std::string const path = "/home/Work/cpp/";
  std::string name;

  std::cout << "Input project name: ";
  std::cin >> name;

  if (name.empty())
    {
      std::cerr << "Empty file name" << std::endl;
      return EXIT_FAILURE;
    }

  std::string const dir = path + name;

  if (mkdir(dir.c_str(), 0755) == -1)
    {
      perror("Cannot create directory");
      return EXIT_FAILURE;
    }

  std::cerr << dir << " created" << std::endl;

  return EXIT_SUCCESS;
}

Answer 2

Too lazy to read books? Or is it necessary to take laboratory work at universities, but is it lazy to study?

Answer 3

I'm surprised there isn't a single correct answer. I was not too lazy and wrote in pure C.

#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include <linux/limits.h>

#define QUOTE_H(W) #W
#define QUOTE(W) QUOTE_H(W)

int main()
{
  char name[NAME_MAX+1] = "";
  char path[PATH_MAX] = "/home/Work/cpp/";

  printf("Input project name: ");
  if (scanf("%s"QUOTE(NAME_MAX), name) == -1)
    {
      fprintf(stderr, "Empty file name");
      return EXIT_FAILURE;
    }

  size_t const max_name_len = PATH_MAX - 1 - strlen(path);
  if (strlen(name) > max_name_len)
    {
      fprintf(stderr, "File name too long");
      return EXIT_FAILURE;
    }

  strncat(path, name, max_name_len);

  if (mkdir(path, 0755) == -1)
    perror("Cannot create directory");
  else
    printf("'%s' created\n", path);

  return EXIT_SUCCESS;
}