Incrementing count

Question

Hi, i have two problems with my code which I need to fix. 1. How can i get the the results of the station to print out until it reaches 40 stations because it carries on printing in the loop to the screen. 2. How can i get the print statement to print the number of stations it is creating the results for?, i.e the station count goes up in fours, so i want it to print the first batch of results as 4 then 8, then 12 etc.......
Please could anyone help me, thanks.
here is a copy of the code, and also where the arrows are is where I the problems are. Feel free to run the code to see what it does, i think that will clear the problems i want fixings, thanks again.
import java.io.*;
import java.util.*;
import java.awt.*;
import java.text.*;
import java.lang.Object.*;
import java.lang.Math.*;
public class TRS {
public static void main(String[] args){
int packets = 400; // number of packets for each station
double dataRate = 16e6;     // Data transmission rate in bps
int size = 1600;     // Average packet size in bits
int mean;                              
int stations;
double ring = 100;          // Ring circumference in metres
double ring_inc = (ring/2e8);     // Ring rotation time in mirco-seconds
double token_time = (24/dataRate); // Token transmission time
     Random rn = new Random();
for(int i=4;i<41;i=+4){    <------------------------------------
System.out.println("\nNumber of Stations = " + (stations)); <----------------------
System.out.println(" ");
System.out.println("\tMean\t\tMean_Delay\tThroughput");
System.out.println(" ");
int [] seeds = new int[stations];
double stat_inc = (ring_inc/stations);     // Inter-station propogation time
double frame_time = (size/dataRate);     // Framet ransmission time
     for(i=0;i<stations;i++){
     seeds[i] = (int)(Math.ceil(8999 + 1) * rn.nextDouble()) + 999;
     double [][] tt = new double[stations][packets];
     for(mean=1;mean<10;mean++){                         // Mean inter-arrival time in milli-seconds
          for(int j=0;j<stations;j++) {
               rn.setSeed(seeds[j]);
     double [] t = new double[packets];
          for(i=0;i<packets;i++){
          t[i] = -mean*Math.log(rn.nextDouble())/1000.0;
          for(i=1;i<packets;i++){
               double z = t;
               double y = tt[j][i-1];
               tt[j][i] = y + z;
          int end = 1;
          double elapsed = 0;
          int [] next = new int[stations];          
               for(i=0;i<stations;i++){               
                    next[i] = 1;               
          int token = 0;
          double [] delays = new double[40000];
          double sum = 0;
          int counter = 0;               
          double Q = tt[token][next[token]];
while(end < packets){     
     if(elapsed > Q){                                                   
     delays[counter] = elapsed - tt[token][next[token]];
          next[token] = next[token] + 1;
          counter += 1;
          if(end < next[token]){
          end = next[token];
               elapsed += (ring_inc + stat_inc + frame_time + token_time);                    
          else {
          elapsed += stat_inc + token_time;
               token = (token+1) % stations;               
               Q = tt[token][next[token]];               
          for(i=0;i<counter;i++){
               sum += delays[i];
          double mean_delay = sum/counter;
          double throughput = counter * size/elapsed;
          NumberFormat formatter = new DecimalFormat("0.000E000");
          String m = formatter.format(mean*1e-5);
          String md = formatter.format(mean_delay);
          String tp = formatter.format(throughput);
     System.out.println("\t" + (m) + "\t" + (md) + "\t" + (tp));

Answer 1

for(int i=4;i<41;i=+4)I suppose this will compile, but since you ask about
incrementing the count: that doesn't do it. It
assigns +4 to i. From what you say it sounds like you
want to add 4 to i on each iteration of the loop.
That would befor(int i=4;i<41;i=i+4)
Ah.
So presumably he meant i += 4 and transposed the + and the = (and added a space to boot).
Or maybe he just forgot an i.