Variable style 'string' substitutes variables in definition

script.

For the {string} style, a single string is assigned to the variable.

The only difference between this and using the {index} style with a

single string is that a variable with {string} style can be redefined.

E.g. by another command later in the input script, or if the script is

read again in a loop.

Two differences between this this and using the {index} style exist:

a variable with {string} style can be redefined, e.g. by another command later

in the input script, or if the script is read again in a loop. The other

difference is that {string} performs variable substitution even if the

string parameter is quoted.

For the {format} style, an equal-style variable is specified along

with a C-style format string, e.g. "%f" or "%.10g", which must be

  } else if (strcmp(arg[1],"string") == 0) {

    if (narg != 3) error->all(FLERR,"Illegal variable command");

    int maxcopy = strlen(arg[2]) + 1;

    int maxwork = maxcopy;

    char *scopy = new char[maxcopy];

    char *work = new char[maxwork];

    strcpy(scopy,arg[2]);

    input->substitute(scopy,work,maxcopy,maxwork,1);

    delete [] work;

    int ivar = find(arg[0]);

    if (ivar >= 0) {

      if (style[ivar] != STRING)

        error->all(FLERR,"Cannot redefine variable as a different style");

      delete [] data[ivar][0];

      copy(1,&arg[2],data[ivar]);

      copy(1,&scopy,data[ivar]);

      replaceflag = 1;

    } else {

      if (nvar == maxvar) grow();

      which[nvar] = 0;

      pad[nvar] = 0;

      data[nvar] = new char*[num[nvar]];

      copy(1,&arg[2],data[nvar]);

      copy(1,&scopy,data[nvar]);

    }

    delete [] scopy;

  // GETENV

  // remove pre-existing var if also style GETENV (allows it to be reset)

#include <cstdlib>

#include "pointers.h"

#include "input.h"

namespace LAMMPS_NS {