Thread: Using variables within system command?

Hey guys, I'm not sure if what I'm trying to do is possible or the way I should do it. Basically I want to ask for a hostname, a message and place them in string variables as host and msg respectively. The contents will then be parsed onto the "net send" system command.

This is my best way of describing what I'm trying to do:

Code:

system("net send ") << host << msg << endl;

If its not clear enough I can post more of the code.

I got a compile error from Dev C++ telling me

Code:

systemSender += host + msg;

is wrong, so I changed it to

Code:

systemSender += host, msg;

and it compiles fine. Everything seems to be working fine except when I try "Host: 127.0.0.1" & "Msg: Hello" it tells me sending files are no longer supported. I think this is because the variables parsed mighten be spaced out after eachother, so its trying to perform this command:

Code:

net send 127.0.0.1Hello

How can I space host and msg out?

The +'s dont seem to work, I get an error on compile but I'll show you what does work.

Code:

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

using namespace std;

char host[64], msg[512];
string systemSender = "net send ";

char getinfo()
{
     cout<< "Hostname: ";
     cin.getline (host, 64, '\n');
     cout<< "Message: ";
     cin.getline (msg, 512, '\n');
}

char send()
{
     systemSender += host;
     systemSender += " ";
     systemSender += msg;
     system(systemSender.c_str());
}

int main()
{  
    getinfo();
    send();
    cin.get();
}

Anything I'm missing thats not letting me use "+ host + msg" ?

So what can it take two of?

Sweet everything works thanks