Help With My Project %ipcode%

[Maylea]

How do I make this code work in c++ Like it works in Batch. For some reason it wont use %ipcode%. So I cant input ip's to see if there online.

In c++ its like this

system("set /p %ipcode%= ip=\"");
 
system("ping %ipcode%\"");

In batch its like this

set /p ipcode= ip="
 
ping %ipcode%"

[sicarie]

How do I make this code work in c++ Like it works in Batch. For some reason it wont use %ipcode%. So I cant input ip's to see if there online.

In c++ its like this

system("set /p %ipcode%= ip=\"");
 
system("ping %ipcode%\"");

In batch its like this

set /p ipcode= ip="
 
ping %ipcode%"

The issue that you are running into is because C/C++ handles strings differently. What I would recommend is creating a string to hold the first part of the command up to the variable. Then make sure the variable is of the same type, and combine the two strings (or char arrays, or whatever you decided to use), and then add whatever else you need after it. Then you can pass the system command a variable, which will be interpreted as a string of the entire command (with proper IP address).

I'm not sure how much you know about strings, so I'll give you a basic strings intro at the bottom of the page.

[ravenspoint]

The trouble here is that the two calls to system() each set up a separate, independent run of cmd.exe. So, the second call cannot "see" the value of the %ipcode% variable you prompted for and set during the first call.

I would suggest using C code to prompt for the ipcode, then format the answer into the second command and so call system() just once.

[sicarie]

The trouble here is that the two calls to system() each set up a separate, independent run of cmd.exe. So, the second call cannot "see" the value of the %ipcode% variable you prompted for and set during the first call.

I would suggest using C code to prompt for the ipcode, then format the answer into the second command and so call system() just once.

Ooooh, good call. I totally missed what was going on in the first call...

Nice catch, ravenspoint.

[Maylea]

Do you know what kind of code should be replaced with system()?

[ravenspoint]

Do you know what kind of code should be replaced with system()?

I do not understand the question.

[Maylea]

The trouble here is that the two calls to system() each set up a separate, independent run of cmd.exe. So, the second call cannot "see" the value of the %ipcode% variable you prompted for and set during the first call.

I would suggest using C code to prompt for the ipcode, then format the answer into the second command and so call system() just once.

How would I go on doing this in a c code?

[ravenspoint]

How would I go on doing this in a c code?

Do you know how to prompt the user to enter a value into a C program?

Do you know how to use sprintf()

[Maylea]

I am sorta new to c++. For right now I know batch code's so I was using system(). I am not to sure of sprintf()

I just need a quick deminstration how it work's with %ipcode%.

[ravenspoint]

I am sorta new to c++. For right now I know batch code's so I was using system(). I am not to sure of sprintf()

I just need a quick deminstration how it work's with %ipcode%.

OK. Let's take it step by step.

Write a small program to prompt the user, receive what the user types in, and then print it out again.

If you cannot make it work, post your code here. I, or someone will help you sort it out.

If it works, great, you are about 80% done and we can finish it off.

[Maylea]

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
system("set /p ipcode= ip=\"");
system("ping %ipcode%\"");
return EXIT_SUCCESS;
}

This is what im talking about by not finding %ipcode%.

[ravenspoint]

#include <cstdlib>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
system("set /p ipcode= ip=\"");
system("ping %ipcode%\"");
return EXIT_SUCCESS;
}

This is what im talking about by not finding %ipcode%.

I believe I answered this question, in my first post. The two calls to system are entirely independant from one another. The value the user sets ipcode with is lost when the second system call is made.

Why are you repeating your initial question?

[ravenspoint]

Here is the psuedo code of the program you need to write:


- prompt user, using printf()

- receive ip from user, using scanf()

- format system command, using sprintf()

- call system()

[Maylea]

Oh I was just showing you the code. Because the last one wasnt right.