Thread: Problem using system() command.

I'm making a program that makes use of the net send command in windows. Anyway, the problem is that i cant use strings as part of the argument in the system() command. I know that there is one way to fix the problem, and that is to have my program create and execute a batch file, but i wanted to know if there was an easier way. Here is my program.

Code:

#include <iostream>

using namespace std;

int main()
{
string message;
cout<<"This program will send a message to everyone on the network.\nWhat do you want the message to say?\n";
getline(cin, message, '\n');
system("net send * " + message);
/* I also tried:
string command = "net send * " + message;
system (command)
*/
cout<<"your message has been sent!\n";
cin.get();
cin.get();
}

Does anyone know a way to get it to work, or do i have to make a batch file?

I would guess something like the following would work;

Code:

#include <the header that declares system()>
#include <string>
#include <iostream>

using namespace std;

int main()
{
    string message;
    cout<<"This program will send a message to everyone on the network.\nWhat do you want the message to say?\n";
    getline(cin, message, '\n');
    string command = "net send * ";
    command += message;
    system(command.c_str());
    cout<<"your message has been sent!\n";
}

The reason is that the system() function usually accepts a char * argument, not a C++ string object. And char *'s cannot be simply added, although C++ strings support such an operation.