Assignment

#include "NativeMethod.h"
#include "legacy.h"
#include <stdio.h>
JNIEXPORT jint JNICALL Java_NativeMethod_calculateGreenTax(JNIEnv *env,
        jclass cls, jobject car) {
    jclass Car = (*env)->GetObjectClass(env, car);

    jfieldID id_category = (*env)->GetFieldID(env, Car, "category", "I");
    jint category = (*env)->GetIntField(env, car, id_category);

    jfieldID id_km = (*env)->GetFieldID(env, Car, "km", "D");
    jdouble km = (*env)->GetDoubleField(env, car, id_km);

//  jmethodID idCategory = (*env)->GetMethodID (env, Car, "getCategory", "()I");
//    int category = (*env)->CallIntMethod (env, car, idCategory);
//
//    jmethodID idKm = (*env)->GetMethodID (env, Car, "getKm", "()D");
//  double km = (*env)->CallDoubleMethod (env, car, idKm);

    return calculate(category, km);
}