datagen.cpp

来自「This is the second part of that lab manu」· C++ 代码 · 共 42 行

//: C05:Datagen.cpp
// From "Thinking in C++, 2nd Edition, Volume 2"
// by Bruce Eckel & Chuck Allison, (c) 2001 MindView, Inc.
// Available at www.BruceEckel.com.
// Test data generator
//{L} Datalog ../TestSuite/Test
#include "DataLogger.h"
#include "../require.h"
#include <fstream>
#include <cstdlib>
#include <cstring>
using namespace std;

int main() {
  ofstream data("data.txt");
  assure(data, "data.txt");
  ofstream bindata("data.bin", ios::binary);
  assure(bindata, "data.bin");
  time_t timer;
  // Seed random number generator:
  srand(time(&timer)); 
  for(int i = 0; i < 100; i++) {
    DataPoint d;
    // Convert date/time to a structure:
    d.setTime(*localtime(&timer));
    timer += 55; // Reading each 55 seconds
    d.setLatitude("45*20'31\"");
    d.setLongitude("22*34'18\"");
    // Zero to 199 meters:
    double newdepth  = rand() % 200;
    double fraction = rand() % 100 + 1;
    newdepth += double(1) / fraction;
    d.setDepth(newdepth);
    double newtemp = 150 + rand()%200; // Kelvin
    fraction = rand() % 100 + 1;
    newtemp += (double)1 / fraction;
    d.setTemperature(newtemp);
    d.print(data);
    bindata.write((const char*)&d, sizeof(d));
  }
} ///:~