Hi there,
I'm trying to embed root into a C++ application in the following way:
In the constructor of a class I call
myInterpreter = new TRint("ROOT population", NULL, NULL);
myInterpreter is defined as TRint * in the same class. A function of that
class is then supposed to repeatedly execute root scripts like this :
gROOT->ProcessLine(Form(".x
%s(%p,%d,%p)",rootScript.c_str(),values,size_this,&result),&error);
"values" is a double array of size size_this, result is a double. I'm using
the following example script, it is stored in a file parabola.cc (the same
name is stored in the string "rootScript", see above).
void parabola(double *values, int nValues, double *result)
{
int i;
*result=0;
for(i=0; i<nValues; i++)
*result += values[i]*values[i];
}
Executing my application results in the following error message :
[...]
CINT/ROOT C/C++ Interpreter version 5.15.74, Feb 2 2003
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
Error: Function parabola(0xbfffd8d0,2,0xbfffda38) is not defined in current
scope FILE: LINE:0
Possible candidates are...
filename line:size busy function type and name
parabola.cc 1:8 0 public: void parabola(double* values,int
nValues,double* result);
[...]
If I do the same directly in root, namely :
root [0] double values[2]={2.,2.};
root [1] double result;
root [2] int size_this = 2;
root [3] .x parabola.cc(values,size_this,&result);
root [4] cout << result << endl;
8
I get back the correct result.
Any help is appreciated !
Have a nice day,
Ruediger Berlich
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