How do I write and run c++ programs via terminal?

bbgun7 · 2014-08-24 19:02:10

First off, if this is the wrong place to post, my apologies. I'm running arch off a raspberry pi, and sshing into it on my computer (a mac, if it makes a difference), and I was wondering how I could run c++ programs on it. I don't want to install a desktop environment, because I think using terminal is a cool challenge. I'm assuming I can just use nano or some other text editor to write them, but how do I get them to run, as well as get all the libraries I would need? I am thinking just things that run in terminal, no programs with a gui. Any suggestions?

thiagowfx · 2014-08-24 19:09:31

Hi, I should say this kind of post is not usually encouraged here; people usually expect you to do some research first and tell them what have you tried, before posting.
However, since you seem not to have any directions, I think it's fair to give you some.

I would advise you to search for those keywords / programs (see also our Wiki):

- SSH (I think you have already done that)
- a C++ compiler. Usually g++ (present in the gcc package) or clang. I would recommend g++.
- a terminal text editor. Emacs or vim are usually choices that advanced users prefer; however, if you don't know them (yet), you should probably use something easier for novices, such as nano. If you opt for emacs, install the emacs-nox package.

That's all you need, really. You might want a program such as make or cmake later, to aid you with your build management. There are several tutorials out there teaching how to do that. Search for 'hello world' ones.

ewaller · 2014-08-24 19:11:51

First, I am going to suggest you take Arch Arm questions to their forums. They are the experts.

But, what you ask is easy -- if the tools are installed on your ras-pi. Here is some code I did not write that generates data that can be piped to gnuplot to animate a Lorenz attractor.

ewaller$@$odin ~/devel/C/lorenz [130]1026 %cat lorenz.cpp
#include <iostream>

#define tab "\t"

using namespace std;

void lorenz(double *x,double *dxdt)
{
  dxdt[0]=10.0*(x[1]-x[0]);
  dxdt[1]=28.0*x[0]-x[1]-x[0]*x[2];
  dxdt[2]=-2.666666666666*x[2]+x[0]*x[1];
}



int main(int argc,char **argv)
{
  int len=300;
  double x[len*3],dxdt[3],dt=0.01;

  x[0]=1.0;x[1]=1.0;x[2]=1.0;
  int cur=0,next=1;
  for(int i=1;i<len*10;i++)
    {
      lorenz(x+3*cur,dxdt);
      for(int j=0;j<3;j++) x[3*next+j]=x[3*cur+j]+dt*dxdt[j];
      if(++cur == len) cur=0;
      if(++next == len) next=0;
    }

  for(double t=0.0;t<100000000.0;t+=dt)
    {
      cout<<"sp [-30:30][-30:30][0:50] '-' w l"<<endl;
      for(int i=cur+1;i<len;i++)
	cout<<tab<<x[3*i]<<tab<<x[3*i+1]<<tab<<x[3*i+2]<<endl;
      for(int i=0;i<cur+1;i++)
	cout<<tab<<x[3*i]<<tab<<x[3*i+1]<<tab<<x[3*i+2]<<endl;
      cout<<'e'<<endl;

      lorenz(x+3*cur,dxdt);
      for(int j=0;j<3;j++) x[3*next+j]=x[3*cur+j]+dt*dxdt[j];
      if(++cur == len) cur=0;
      if(++next == len) next=0;
    }

  return 0;
}
ewaller$@$odin ~/devel/C/lorenz 1027 %g++ lorenz.cpp
ewaller$@$odin ~/devel/C/lorenz 1028 %./a.out|head  
sp [-30:30][-30:30][0:50] '-' w l
	-9.3252	-8.45882	29.0952
	-9.23857	-8.27211	29.1081
	-9.14192	-8.08701	29.0961
	-9.03643	-7.90593	29.0595
	-8.92338	-7.73113	28.999
	-8.80415	-7.56467	28.9156
	-8.68021	-7.40841	28.8105
	-8.55303	-7.26397	28.6853
	-8.42412	-7.13271	28.5417
ewaller$@$odin ~/devel/C/lorenz 1029 %

You may want to set up a cross compiler on your x86_64 Arch system for ARM. That we can help you with....

Arch Linux

#1 2014-08-24 19:02:10

How do I write and run c++ programs via terminal?

#2 2014-08-24 19:09:31

Re: How do I write and run c++ programs via terminal?

#3 2014-08-24 19:11:51

Re: How do I write and run c++ programs via terminal?

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