1 | # Author: Mete Rodoper
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2 |
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3 | # Difference between random walk with wrapping and this one is; this has $runningTime limitation.
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4 | # For more detail refer the How to code and use Various Mobility Model Scripts to Emulate Mobility at ORBIT tutorial
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5 |
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6 | #!/usr/bin/perl
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7 |
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8 | use Math::Round qw(:all);
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9 | use Math::Trig 'deg2rad';
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10 |
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11 | #############################################################################################################
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12 | ######################################## Input the values below #############################################
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13 | #############################################################################################################
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14 |
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15 | $sourceXValue = 2; # Source X value
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16 | $sourceYValue = 2; # Source Y value
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17 |
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18 | $walkDuration = 1000; # Walk duration in unit time in one direction. When this time elapses change direcion
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19 | $speed = 100; # Average speed of the VMs
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20 | $angle = 360; # Angle randomness of the movements
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21 | $randomnessInterval = 2; # Maximum distance that a node can jump at an iteration
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22 | $numberOfStops = 50; # Number of destinations before script terminates
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23 | $runningTime = 100; # Running time bound for the script. when this equals to 0, program terminates
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24 |
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25 | #############################################################################################################
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26 | #############################################################################################################
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27 | #############################################################################################################
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28 |
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29 | $mobileNumber = 0;
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30 | $previousNode = "";
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31 |
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32 | $numberOfStopsMax = $numberOfStops;
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33 | $mobileNumberIterator = $mobileNumber;
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34 | $intervalTime = 0;
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35 |
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36 | $pointX = $sourceXValue;
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37 | $pointY = $sourceYValue;
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38 |
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39 | $endMainLoop = 0;
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40 |
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41 | while ($numberOfStops > 0 && $endMainLoop == 0)
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42 | {
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43 | $speedChosen = int(rand($speed));
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44 | $angleChosen = int(rand($angle));
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45 |
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46 | $angleRad = deg2rad($angleChosen);
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47 |
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48 | $noOfHops = $walkDuration/$speed;
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49 |
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50 | while ($noOfHops > 0 && $endMainLoop == 0)
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51 | {
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52 | $pointX = $pointX + cos($angleRad);
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53 | $pointY = $pointY + sin($angleRad);
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54 |
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55 | $fractionX = abs($pointX - int($pointX));
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56 | $fractionY = abs($pointY - int($pointY));
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57 |
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58 | $firstQuarter = $fractionY * $fractionY + $fractionX * $fractionX;
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59 | $secondQuarter = $fractionY * $fractionY + (1-$fractionX) * (1-$fractionX);
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60 | $thirdQuarter = (1-$fractionY) * (1-$fractionY) + (1-$fractionX) * (1-$fractionX);
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61 | $fourthQuarter = (1-$fractionY) * (1-$fractionY) + $fractionX * $fractionX;
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62 |
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63 | $floorX = int($pointX);
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64 | $floorY = int($pointY);
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65 |
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66 |
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67 |
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68 | if($pointX < 0)
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69 | {
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70 | $ceilingX = $floorX - 1;
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71 | }
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72 | else
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73 | {
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74 | $ceilingX = $floorX + 1;
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75 | }
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76 |
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77 | if($pointY < 0)
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78 | {
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79 | $ceilingY = $floorY - 1;
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80 | }
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81 | else
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82 | {
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83 | $ceilingY = $floorY + 1;
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84 | }
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85 |
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86 | $minDistance = $firstQuarter;
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87 | $min = "1";
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88 | if ($secondQuarter < $minDistance)
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89 | {
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90 | $min = "2";
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91 | $minDistance = $secondQuarter;
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92 | }
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93 | if ($thirdQuarter < $minDistance)
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94 | {
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95 | $min = "3";
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96 | $minDistance = $thirdQuarter;
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97 | }
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98 | if ($fourthQuarter < $minDistance)
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99 | {
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100 | $min = "4";
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101 | }
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102 |
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103 | if ($min == "1")
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104 | {
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105 | $newX = $floorX % 20 + 1;
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106 | $newY = $floorY % 20 + 1;
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107 |
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108 | $nodeNameAndTime = "node$newX-$newY";
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109 | if ($previousNode ne $nodeNameAndTime)
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110 | {
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111 | $toFile = "$intervalTime $nodeNameAndTime";
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112 | print "$toFile\n";;
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113 | push @{$store{$mobileNumber}}, $toFile;
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114 | $previousNode = $nodeNameAndTime;
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115 | $runningTime--;
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116 | $intervalTime = $intervalTime + $speed;
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117 | }
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118 | }
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119 | elsif ($min == "2")
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120 | {
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121 | $newX = $ceilingX % 20 + 1;
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122 | $newY = $floorY % 20 + 1;
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123 |
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124 | $nodeNameAndTime = "node$newX-$newY";
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125 | if ($previousNode ne $nodeNameAndTime)
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126 | {
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127 | $toFile = "$intervalTime $nodeNameAndTime";
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128 | print "$toFile\n";;
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129 | push @{$store{$mobileNumber}}, $toFile;
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130 | $previousNode = $nodeNameAndTime;
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131 | $runningTime--;
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132 | $intervalTime = $intervalTime + $speed;
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133 | }
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134 | }
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135 | elsif ($min == "3")
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136 | {
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137 | $newX = $ceilingX % 20 + 1;
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138 | $newY = $ceilingY % 20 + 1;
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139 |
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140 | $nodeNameAndTime = "node$newX-$newY";
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141 | if ($previousNode ne $nodeNameAndTime)
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142 | {
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143 | $toFile = "$intervalTime $nodeNameAndTime";
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144 | print "$toFile\n";;
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145 | push @{$store{$mobileNumber}}, $toFile;
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146 | $previousNode = $nodeNameAndTime;
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147 | $runningTime--;
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148 | $intervalTime = $intervalTime + $speed;
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149 | }
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150 | }
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151 | elsif ($min == "4")
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152 | {
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153 | $newX = $floorX % 20 + 1;
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154 | $newY = $ceilingY % 20 + 1;
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155 |
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156 | $nodeNameAndTime = "node$newX-$newY";
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157 | if ($previousNode ne $nodeNameAndTime)
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158 | {
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159 | $toFile = "$intervalTime $nodeNameAndTime";
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160 | print "$toFile\n";;
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161 | push @{$store{$mobileNumber}}, $toFile;
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162 | $previousNode = $nodeNameAndTime;
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163 | $runningTime--;
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164 | $intervalTime = $intervalTime + $speed;
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165 | }
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166 | }
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167 |
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168 | if ($runningTime == 0)
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169 | {
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170 | print "The chosen distance is reached. Ending Simulation...\n";
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171 | $endMainLoop = 1;
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172 | }
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173 | $noOfHops--;
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174 | }
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175 |
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176 | if ($endMainLoop == 0)
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177 | {
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178 | $numberOfStopsToPrint = $numberOfStopsMax + 1 - $numberOfStops;
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179 | $mobileNumberIteratorToPrint = $mobileNumberIterator +1;
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180 | print "Destination No : $numberOfStopsToPrint is Reached for Mobile Node Number : $mobileNumberIteratorToPrint\n";
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181 | }
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182 |
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183 | $pointX = $newX;
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184 | $pointY = $newY;
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185 |
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186 | $numberOfStops--;
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187 | }
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188 |
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189 | $mobileNumberIterator = 0;
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190 | $nodeNumber = $mobileNumberIterator + 1;
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191 |
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192 | while (${$store{$mobileNumberIterator}}[$j] ne ())
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193 | {
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194 | $tempWrite = ${$store{$mobileNumberIterator}}[$j];
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195 | system("echo $tempWrite >> VM$nodeNumber.txt");
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196 | $j = $j + 1;
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197 | }
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198 |
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199 |
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