Making smaller version of chatterbot, Eliza

hello everyone,
I am trying to make a smaller version of a program like Eliza, a chatterbot. Here is my code.

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#include <cstdlib>
#include <iostream>
#include <cstring>
#include <stdio.h>
#include <string.h>
#include <string>
#include <windows.h>
#include <fstream>
#include <tchar.h>


// a few global variables 

     char str[50]; // this one is for the responses, the 50 is a random number, needed something big
     int redo;     // for restarting the speech thing
     
using namespace std;


void open_Something()
{  
     cout << "Enter something to open: ";
     
     char way[50];
     cin.getline (way,50);
     char *path = way;
        
    STARTUPINFO si;
    PROCESS_INFORMATION pi;

    ZeroMemory( &si, sizeof(si) );
    si.cb = sizeof(si);
    ZeroMemory( &pi, sizeof(pi) );

    // Start the child process. 
    if( !CreateProcess( NULL,   // No module name (use command line)
        path,        // Command line
        NULL,           // Process handle not inheritable
        NULL,           // Thread handle not inheritable
        FALSE,          // Set handle inheritance to FALSE
        0,              // No creation flags
        NULL,           // Use parent's environment block
        NULL,           // Use parent's starting directory 
        &si,            // Pointer to STARTUPINFO structure
        &pi )           // Pointer to PROCESS_INFORMATION structure
    ) 
    {
        printf( "CreateProcess failed (%d).\n", GetLastError() );
    }

    // Wait until child process exits.
    WaitForSingleObject( pi.hProcess, INFINITE );

    // Close process and thread handles. 
    CloseHandle( pi.hProcess );
    CloseHandle( pi.hThread );
    
}
    

    

int main()
    {
    
    do
     {
    
     string resp[5] = {
            "Got anything else to say?",
            "That is it, nothing else?",
            "...Anything else",
            "So, what's up?",
            "Talk to me",
            };
     
     // number generator
     
     int which_Num;
     
     unsigned seed = time(0);
     srand(seed);
     
     which_Num = rand() % 5;
     
     cout << resp[which_Num];
     cin.getline (str,50); 
     
     
     char * pch;
     pch = strstr (str,"open");
   
     if (pch != NULL)
     {
        open_Something();
     }
     
     char * pch1;
     pch = strstr(str,"what, is, your, name,"); 
     if (pch1 != NULL)
     {
        cout << "My name, you say\n"
             << "It is Jubajee\n"
             << "Cool eh?\n";
             redo = 1;
     }
     
     char * pch2;
     pch = strstr(str,"are you smart, are you intelligent, are you dumb");
     if  (pch2 != NULL)
     {
         cout << "What kind of a question is that\n"
              << "I am talking to you aren't I\n"
              << "btw I am smart okay?\n";
              redo = 1;
     }
     
     
     
     //the bottom curly brace is for the do-while loop
     }while (redo == 1);
     
    system("PAUSE");
    return 0;
}

Anyways, the problem I was having is that when a keyword is found in the reply the user gives, all of the responses are put out including the one that was supposed to be put out. Can someone have a look at the code and help me, any comments would be appreciated. Thanks in advance for the help.
never mind everybody. I got it working. Thanks anyways.
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