no match for 'operator<<' in.... Compile Problem!

Hi,

Just wondering if anyone can help me out in turning this program into a working program.

Basically, everything works, apart from inserting the results in the last SYSTEM() line.


Any help would be greatly appreciated.

Code:

---

#include <cstdlib>
#include <iostream>

using namespace std;



int main()
{
  string a;
  string b;
  string c;

  cout << "Enter source path (where files will be moved from)\n";
  cout << ": ";
  cin >> a;
  cout << "Enter destination path (where files will be moved to)\n";
  cout << ": ";
  cin >> b;
  cout << "Enter minimum access age in days\n";
  cout << "(This will move all files not accessed in x number of days)\n";
  cout << ": ";
  cin >> c;
  cout << c << a << b;

  system("robocopy //MOVE //MINLAD:" << c << a << b"");



  system("PAUSE");
  return EXIT_SUCCESS;
}

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Code:

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string a;
string b;
string c;

---

These also require you to #include the <string> header.

Code:

---

system("robocopy //MOVE //MINLAD:" << c << a << b"");

---

You can't do it like this. You'll likely need to use either a stringstream or sprintf to format the command.

Quote:

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Originally Posted by hk_mp5kpdw

Code:

---

string a;
string b;
string c;

---

These also require you to #include the <string> header.

Code:

---

system("robocopy //MOVE //MINLAD:" << c << a << b"");

---

You can't do it like this. You'll likely need to use either a stringstream or sprintf to format the command.

---

Ah!

How would I go about doing this?

I'm pretty much a beginner in C++ and could do with all the help I can get.


Thanks.

Using sprintf:

Code:

---

#include <cstdio>

...

char buffer[100];

sprintf(buffer,"robocopy //MOVE //MINLAD:%s %s %s",a.c_str(),b.c_str(),c.c_str());

system(buffer);

---

Using stringstream:

Code:

---

#include <sstream>

...

stringstream sstr;

sstr << "robocopy //MOVE //MINLAD:" << a << ' ' << b << ' ' << c;

system(sstr.str().c_str());

---

Or more simply, just use + since they are all strings.

Code:

---

string d = "robocopy //MOVE //MINLAD:" + c + " " + a + " " + b;
system(d.c_str());

---

That too. :D