Find and replace

This is a discussion on Find and replace within the C++ Programming forums, part of the General Programming Boards category; Code: #include <iostream> #include <fstream> #include <cstring> using namespace std; int main() { string r_place; string word; ifstream f_in( "example.txt" ...

  1. #16
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    Code:
    #include <iostream>
    #include <fstream>
    #include <cstring>
    
    using namespace std;
    
    int main()
    {
        string r_place;
        string word;
        
        ifstream f_in("example.txt");//open file to READ
        
        cout<<"Enter word you wish to replace"<<endl;
        cin>>word;
        cin.ignore();
        
        int size = word.length();//find the length of the word
        
        cout<<"Enter word you wish to replace it with"<<endl;
        getline(cin,r_place,'\n');
        
        cin.ignore();
        cout<<"\n\n";
        
        
        string search;
        ofstream f_out("update.txt");//open file to WRITE
    	
        while(getline(f_in, search, '\n'))//read in a line
    	{
    	    
    	   
        string::size_type pos = -1;
    	while( ( pos = search.find(word, pos+1) ) != string::npos )
    	{
    	    search.replace(pos,size,r_place);
    		//search.erase( (search.begin() + pos), (search.begin() + (pos + size)) );
    		//search.insert( pos, r_place );
    	}
    	f_out << search << endl;//Write to file
    	    
    		
        }
        f_in.close(); //close file (reading)
        f_out.close(); //close file (writing)
        cin.get();
        
        
    }
    You are almost there but the order of your program is slightly wrong. Also you need to open up a file to write to.
    The corrected file is named "update.txt"


    Code:
    example.txt
    ---------------
    Hello
           my
                name
                         is 
                            treenef
    Sample input:
    Code:
    Enter word you wish to replace
    treenef
    Enter word you wish to replace it with
    Sam Granger
    Code:
    update.txt
    -------------
    Hello
           my
                name
                         is 
                            Sam Granger

  2. #17
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    Borland c++ builder 6 is popping this back at me when i try to run it.

    Build
    [Linker Error] Unresolved external '__InitVCL' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\LIB\CP32MTI.LIB|crtlvcl
    [Linker Error] Unresolved external '__ExitVCL' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\LIB\CP32MTI.LIB|crtlvcl

  3. #18
    C++ Enthusiast jmd15's Avatar
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    That's because you are not linking the vcl library, why are you using vcl anyways?
    Trinity: "Neo... nobody has ever done this before."
    Neo: "That's why it's going to work."
    c9915ec6c1f3b876ddf38514adbb94f0

  4. #19
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    I'm using Devshed ++ so I'm not sure what's going on.
    Someone else who is familiar with the borland compiler will have to take over.

    I can only make suggestions but I'm unsure if they will work.

    One thing I noticed was that in your previous code you had this:

    Code:
    #include <vcl.h>
    Maybe you need to include that in your code perhaps. And Possibly change ...

    Code:
    #include <cstring>   to  #include<string>
    assuming that worked for you last time?


  5. #20
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    Thanks!! That made it work.

  6. #21
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    Right, now I have to get this to work in a win32 c++ app. Next step hehe.

  7. #22
    C++ Enthusiast jmd15's Avatar
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    have to? So is this an assignment or job? Or is this something I can help you with; I like Win32 API programming.
    Trinity: "Neo... nobody has ever done this before."
    Neo: "That's why it's going to work."
    c9915ec6c1f3b876ddf38514adbb94f0

  8. #23
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    Quote Originally Posted by jmd15
    have to? So is this an assignment or job? Or is this something I can help you with; I like Win32 API programming.
    Its just something I'd like to learn how to do. All help si really more then welcome!!

    I learn by looking at sourcecode i guess

  9. #24
    Reverse Engineer maxorator's Avatar
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    Well that code snippet that treenef found would look be something like this in Win32:
    Code:
    #include <windows.h>
    #include <fstream>
    #include <string>
    LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
    char szClassName[ ] = "WindowsApp",word[256],r_place[256],*words;
    std::string sword,sr_place;
    HWND static1,static2,edit1,edit2,button;
    std::fstream f_in;
    std::ofstream f_out;
    int size;
    int WINAPI WinMain (HINSTANCE hThisInstance,HINSTANCE hPrevInstance,
                        LPSTR lpszArgument,int nFunsterStil){
        HWND hwnd;
        MSG messages;
        WNDCLASSEX wincl;
        wincl.hInstance = hThisInstance;
        wincl.lpszClassName = szClassName;
        wincl.lpfnWndProc = WindowProcedure;
        wincl.style = CS_DBLCLKS;
        wincl.cbSize = sizeof (WNDCLASSEX);
        wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
        wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
        wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
        wincl.lpszMenuName = NULL;
        wincl.cbClsExtra = 0;
        wincl.cbWndExtra = 0;
        wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
        if (!RegisterClassEx (&wincl))
            return 0;
        hwnd = CreateWindowEx (0,szClassName,"Windows App",WS_OVERLAPPEDWINDOW,
               CW_USEDEFAULT,CW_USEDEFAULT,500,250,HWND_DESKTOP,NULL,
               hThisInstance,NULL);
        ShowWindow (hwnd, nFunsterStil);
        while (GetMessage (&messages, NULL, 0, 0)){
            TranslateMessage(&messages);
            DispatchMessage(&messages);
        }
        return messages.wParam;
    }
    LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){
        switch (message){
            case WM_CREATE:
                static1=CreateWindowEx(0,"Static","Replace",WS_CHILD|WS_VISIBLE,20,
                    20,60,25,hwnd,(HMENU)50000,GetModuleHandle(NULL),NULL);
                edit1=CreateWindowEx(0,"Edit","",WS_BORDER|WS_CHILD|WS_VISIBLE|ES_AUTOHSCROLL,80,
                    18,100,22,hwnd,(HMENU)50001,GetModuleHandle(NULL),NULL);
                static2=CreateWindowEx(0,"Static","with",WS_CHILD|WS_VISIBLE,190,
                    20,30,25,hwnd,(HMENU)50002,GetModuleHandle(NULL),NULL);
                edit2=CreateWindowEx(0,"Edit","",WS_BORDER|WS_CHILD|WS_VISIBLE|ES_AUTOHSCROLL,225,
                    18,100,22,hwnd,(HMENU)50003,GetModuleHandle(NULL),NULL);
                button=CreateWindowEx(0,"Button","Replace",WS_BORDER|WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,335,
                    18,70,22,hwnd,(HMENU)50004,GetModuleHandle(NULL),NULL);
                SendMessage(edit1,EM_LIMITTEXT,256,0);
                SendMessage(edit2,EM_LIMITTEXT,256,0);
                break;
            case WM_COMMAND:
                switch(wParam){
                case 50004:
                    GetWindowText(edit1,word,256);
                    GetWindowText(edit2,r_place,256);
                    sword=word;
                    sr_place=r_place;
                    size=sword.length();
                    if(size==0){
                    MessageBox(hwnd,"You must specify the word to replace","Problem",MB_OK|MB_ICONINFORMATION);
                    }
                    else{
                    std::string search,add; 
                    f_in.open("update.txt");
                    while(std::getline(f_in,search)){
                    std::string::size_type pos = -1;
                    while((pos=search.find(sword,pos+1))!=std::string::npos){ 
                    search.replace(pos,size,sr_place);
                    }
                    add+=search+"\n";
                    } 
                    f_out.open("update.txt");
                    f_out<<add;
                    f_out.close();
                    f_in.clear();
                    f_in.close();
                    }
                }
                break;
            case WM_DESTROY:
                PostQuitMessage (0);
                break;
            default:
                return DefWindowProc (hwnd, message, wParam, lParam);
        }
        return 0;
    }
    It works for me...
    And it can be done like this too:
    Code:
    #include <windows.h>
    #include <stdio.h>
    #include <string>
    #include <algorithm>
    LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
    char szClassName[ ] = "WindowsApp",word[256],r_place[256],*words;
    std::string sword,sr_place;
    HWND static1,static2,edit1,edit2,button;
    char happy[256];
    FILE * pFile;
    int size;
    int WINAPI WinMain (HINSTANCE hThisInstance,HINSTANCE hPrevInstance,
                        LPSTR lpszArgument,int nFunsterStil){
        HWND hwnd;
        MSG messages;
        WNDCLASSEX wincl;
        wincl.hInstance = hThisInstance;
        wincl.lpszClassName = szClassName;
        wincl.lpfnWndProc = WindowProcedure;
        wincl.style = CS_DBLCLKS;
        wincl.cbSize = sizeof (WNDCLASSEX);
        wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
        wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
        wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
        wincl.lpszMenuName = NULL;
        wincl.cbClsExtra = 0;
        wincl.cbWndExtra = 0;
        wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
        if (!RegisterClassEx (&wincl))
            return 0;
        hwnd = CreateWindowEx (0,szClassName,"Windows App",WS_OVERLAPPEDWINDOW,
               CW_USEDEFAULT,CW_USEDEFAULT,500,250,HWND_DESKTOP,NULL,
               hThisInstance,NULL);
        ShowWindow (hwnd, nFunsterStil);
        while (GetMessage (&messages, NULL, 0, 0)){
            TranslateMessage(&messages);
            DispatchMessage(&messages);
        }
        return messages.wParam;
    }
    LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam){
        switch (message){
            case WM_CREATE:
                static1=CreateWindowEx(0,"Static","Replace",WS_CHILD|WS_VISIBLE,20,
                    20,60,25,hwnd,(HMENU)50000,GetModuleHandle(NULL),NULL);
                edit1=CreateWindowEx(0,"Edit","",WS_BORDER|WS_CHILD|WS_VISIBLE|ES_AUTOHSCROLL,80,
                    18,100,22,hwnd,(HMENU)50001,GetModuleHandle(NULL),NULL);
                static2=CreateWindowEx(0,"Static","with",WS_CHILD|WS_VISIBLE,190,
                    20,30,25,hwnd,(HMENU)50002,GetModuleHandle(NULL),NULL);
                edit2=CreateWindowEx(0,"Edit","",WS_BORDER|WS_CHILD|WS_VISIBLE|ES_AUTOHSCROLL,225,
                    18,100,22,hwnd,(HMENU)50003,GetModuleHandle(NULL),NULL);
                button=CreateWindowEx(0,"Button","Replace",WS_BORDER|WS_CHILD|WS_VISIBLE|BS_PUSHBUTTON,335,
                    18,70,22,hwnd,(HMENU)50004,GetModuleHandle(NULL),NULL);
                SendMessage(edit1,EM_LIMITTEXT,256,0);
                SendMessage(edit2,EM_LIMITTEXT,256,0);
                break;
            case WM_COMMAND:
                switch(wParam){
                case 50004:
                    GetWindowText(edit1,word,256);
                    GetWindowText(edit2,r_place,256);
                    sword=word;
                    sr_place=r_place;
                    size=sword.length();
                    if(size==0){
                    MessageBox(hwnd,"You must specify the word to replace","Problem",MB_OK|MB_ICONINFORMATION);
                    }
                    else{
                    std::string search,add;
                    pFile = fopen ("update.txt" , "r");
                    while(fgets(happy,1500,pFile)){
                    search=happy;
                    std::string::size_type pos = -1;
                    while((pos=search.find(sword,pos+1))!=std::string::npos){ 
                    search.replace(pos,size,sr_place);
                    }
                    add+=search+"\n";
                    }
                    fclose(pFile);
                    pFile = fopen ("update.txt" , "w+");
                    *(std::copy(add.begin(), add.end() - add.begin() < 256 ? add.end() : add.begin() + 255, happy)) = 0;
                    fputs(happy,pFile);
                    fclose(pFile);
                    }
                }
                break;
            case WM_DESTROY:
                PostQuitMessage (0);
                break;
            default:
                return DefWindowProc (hwnd, message, wParam, lParam);
        }
        return 0;
    }
    which results a smaller executable...
    Last edited by maxorator; 11-03-2005 at 01:55 PM.

  10. #25
    C++ Enthusiast jmd15's Avatar
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    Yeah, those would work too, but check in the Windows Programming board. Sam posted this problem there as well and I already made it for him, so he can learn from the code. I incorporated some things such as common dialogs(File Open, and File Save As), some basic Win32 GDI, Edit and Button windows, etc.
    Trinity: "Neo... nobody has ever done this before."
    Neo: "That's why it's going to work."
    c9915ec6c1f3b876ddf38514adbb94f0

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