Utility routines written in C++

Hello All, i have some question about  Utility routines written in C++.

I'm currently using C++ based User subroutine for VDLOAD, VEXTERNALDB, VUAMP etc.

Quite familiar with C++ based user subroutine, but not for the utility routine especially 'vGetSensorValue'.

How can i call 'vGetSensorValue' routine in C++ based subroutine code?

 Here is the example of C++ based VUAMP which can compile easily but not with 'vGetSensorValue' routines

 

#include
#include
#include
#include
#include
#include
#include

extern "C" void vGetSensorValue(char* sensorNames, float* jSensorLookUpTable, float* sensorValues);
extern "C" void FOR_NAME(vuamp,VUAMP) (
    char* ampName, float* time, float* ampValueOld, float* dt, float* nprops, float* props,
    float* nSvars, float* svars, double* lFlagsInfo, int* nSensor, float* sensorValues,
    char* sensorNames, float* jSensorLookUpTable, double* AmpValueNew, float* lFlagsDefine,
    float* AmpDerivative, float* AmpSecDerivative, float* AmpIncIntegral){

    float displacement=0;
        
    std::size_t len = strnlen(ampName, 3);  
   std::string sname_str(ampName, len);        
        
        
    // Time Indices    
    const int iStepTime        = 1;
    const int iTotalTime       = 2;
    const int nTime            = 2;
    // Flags passed in for information 
    const int iInitialization   = 1;
    const int iRegularInc       = 2;
    const int ikStep            = 3;
    const int nFlagsInfo        = 3;
    // Optional flags to be defined
    const int iComputeDeriv     = 1;
    const int iComputeSecDeriv  = 2;
    const int iComputeInteg     = 3;
    const int iStopAnalysis     = 4;
    const int iConcludeStep     = 5;
    const int nFlagsDefine      = 5;
    
    
    // std::cout << "sname_str=" << sname_str << std::endl;
     vGetSensorValue(sensorNames, jSensorLookUpTable, sensorValues);
    
    if (ampName == "AAA") {
         AmpValueNew = 0;
    }
    
        
    }