threshold工具编译问题解决方法

最新推荐文章于 2024-10-25 15:17:49 发布

转载最新推荐文章于 2024-10-25 15:17:49 发布 · 2.3k 阅读

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#工具 #parameters #iostream #distance #ubuntu #function

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本文介绍NS2中的Threshold工具，用于计算不同无线模型下的接收阈值。支持自由空间、两射线地面及阴影模型，并提供参数设置指导。文章还解决了编译过程中遇到的问题。

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threshold是NS2自带的一个用来计算不同的无线传输模型和传输矩离下的相关参数的小工具.

用法如下 :

root@ubuntu:~/ns-allinone-2.34/ns-2.34/indep-utils/propagation$ ./threshold
USAGE: find receiving threshold for certain communication range (distance)

SYNOPSIS: threshold -m <propagation-model> [other-options] distance

<propagation-model>: FreeSpace, TwoRayGround or Shadowing        //三种传输模型
[other-options]: set parameters other than default values:                   //以下参数均可自行配置

Common parameters:
-Pt <transmit-power>
-fr <frequency>
-Gt <transmit-antenna-gain>
-Gr <receive-antenna-gain>
-L <system-loss>

For two-ray ground model:
-ht <transmit-antenna-height>
-hr <receive-antenna-height>

For shadowing model:
-pl <path-loss-exponent>
-std <shadowing-deviation>
-d0 <reference-distance>
-r <receiving-rate>

该程序的是用C++编写的,位于NS2文件夹下的 ns-allinone-2.34/ns-2.34/indep-utils/propagation/.
程序源码需要编译才能运行:
$g++ -lm threshold.cc -o threshold
然而本人在编译时出现问题:
root@ubuntu:~/ns-allinone-2.34/ns-2.34/indep-utils/propagation$ g++ -lm threshold.cc -o threshold
threshold.cc:56:22: error: iostream.h: 没有那个文件或目录
threshold.cc: In function ‘int main(int, char**)’:
threshold.cc:181: error: ‘cout’ was not declared in this scope
threshold.cc:181: error: ‘endl’ was not declared in this scope
threshold.cc:206: error: ‘cout’ was not declared in this scope
threshold.cc:206: error: ‘endl’ was not declared in this scope
threshold.cc:211: error: ‘strcmp’ was not declared in this scope
threshold.cc:215: error: ‘strcmp’ was not declared in this scope
threshold.cc:218: error: ‘strcmp’ was not declared in this scope
threshold.cc:221: error: ‘strcmp’ was not declared in this scope
threshold.cc:224: error: ‘strcmp’ was not declared in this scope
threshold.cc:227: error: ‘strcmp’ was not declared in this scope
threshold.cc:230: error: ‘strcmp’ was not declared in this scope
threshold.cc:233: error: ‘strcmp’ was not declared in this scope
threshold.cc:236: error: ‘strcmp’ was not declared in this scope
threshold.cc:239: error: ‘strcmp’ was not declared in this scope
threshold.cc:242: error: ‘strcmp’ was not declared in this scope
threshold.cc:245: error: ‘strcmp’ was not declared in this scope
threshold.cc:259: error: ‘strcmp’ was not declared in this scope

排查问题发现,threshold.cc源文件中缺少相关头文件,或者头文件错误,原文如下:

#include <math.h>
#include <stdlib.h>

修改成如下就可以正常编译了:

#include <math.h>
#include <stdlib.h>
#include <iostream>    //增加该头文件以引用输出函数
#include <string.h>      //增加该头文件以引用'strcmp'函数
using namespace std;  //增加命名空间的声明