#include <stdio.h> #include <stdlib.h> #include <time.h> #include "caltime_Jni.h" JNIEXPORT jlong JNICALL Java_caltime_Jni_calculateTime (JNIEnv *e, jobject jo){ long start, end; int i,j,k; long a; //start time start = clock(); //do something for (i = 0; i < 14400000; i++) { a = 255.0 / 16.0; } //end time end = clock(); return end - start; } JNIEXPORT jstring JNICALL Java_caltime_Jni_printStr (JNIEnv *e, jobject j) { return (*e)->NewStringUTF(e, "Rambow"); }