C++ 写的简单ping 工具

// cmd.cpp : 定义控制台应用程序的入口点。
// 目录下放一个txt文件内容为ping 192.168.2.1 及可ping该网段下所有的ip

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <iostream>
#include <fstream>
#include <cassert>
#include <string>
using namespace std;
string readTxt(string file)
{

   ifstream infile;
   infile.open(file.data());   //将文件流对象与文件连接起来
   assert(infile.is_open());   //若失败,则输出错误消息,并终止程序运行

   string s;
   while(getline(infile,s))
   {
       cout<<s<<endl;
       break;
   }

   infile.close();             //关闭文件输入流
   return s;
}

void writetxt(char * ss)
{
   ofstream OutFile;
   /*
       ofstream OutFile;            //实例一个写文件对象

OutFile.open("Test1.txt"); //创建一个Test.txt文本，并且打开Test.txt文件

//ofstream OutFile("Test.txt"); //利用构造函数创建txt文本，并且打开该文本

OutFile <<ss; //把字符串内容"This is a Test!"，写入Test.txt文件

OutFile.close(); //关闭Test.txt文件

       //return 0;
   */
   OutFile.open("mytest.txt", ios::app);
   if(!OutFile) //检查文件是否正常打开
   {
       cout<< "abc.txt can't open"<< endl;
       abort(); //打开失败，结束程序
   }
   else
   {
       OutFile << ss;// << endl;
       OutFile.close();
   }
}
int _System(const char * cmd, char *pRetMsg, int msg_len)
{
   FILE * fp;
   char * p = NULL;
   int res = -1;
   if (cmd == NULL || pRetMsg == NULL || msg_len < 0)
   {
       printf("Param Error!\n");
       return -1;
   }
   if ((fp = _popen(cmd, "r")) == NULL)
   {
       printf("Popen Error!\n");
       return -2;
   }
   else
   {
       memset(pRetMsg, 0, msg_len);
       //get lastest result
       while (fgets(pRetMsg, msg_len, fp) != NULL)
       {
           printf("Msg:%s", pRetMsg); //print all info
       }

       if ((res = _pclose(fp)) == -1)
       {
           printf("close popenerror!\n");
           return -3;
       }
       pRetMsg[strlen(pRetMsg) - 1] = '\0';
       return 0;
   }
}
//char *cmd ;

int getpos(char s[],int star,int len)
{
   for(int i=len;i>5;i--)

   if (s[i]=='.')
   return i;

   return 1;
}
char dd[20] ="ping 127.1.30.1";
int _tmain(int argc, _TCHAR* argv[])
{
   //test cmd
   string ipset;

   ipset=readTxt("ip.txt");//会自动ping txt文件中设置的ip所在的网段
   ipset.copy(dd,20,0);
   int posofpoint= getpos(dd,13,20);

   //char *cmd = "python d:\\PythonProjects\\Demo1.py [1]";
   for (int i=1;i<254;i++)
   {
       char *cmd = "1";

       char u;
       char buffer[65];
       _itoa( i, buffer, 10); //正确解法一
       printf("zzzz%css%css%c",dd[10],dd[11],dd[12]);

       dd[posofpoint+1]=buffer[0];
       dd[posofpoint+2]=buffer[1];
       dd[posofpoint+3]=buffer[2];
       //strcat(dd,buffer);
       char a8Result[128] = { 0 };
       int ret = 0;
       ret = _System((char *)dd, a8Result, sizeof(a8Result));
       printf("ret = %d \na8Result = %s\nlength = %d \n", ret, a8Result, strlen(a8Result));
       char result_[100];


       //sprintf(result_, "%d", 123);
       sprintf(result_,"%s\t ret = %d \na8Result =%s \nlength = %d \n",dd,ret,a8Result, strlen(a8Result));
        writetxt((char *)result_);

   }

   getchar();
   return 0;

}

C++ 写的简单ping 工具

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