Find and replace

**treenef** · 10-18-2005

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

**Sam Granger** · 10-21-2005

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

**jmd15** · 10-21-2005

That's because you are not linking the vcl library, why are you using vcl anyways?

**treenef** · 10-21-2005

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?

**Sam Granger** · 10-21-2005

Thanks!! That made it work.

**Sam Granger** · 11-02-2005

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

**jmd15** · 11-02-2005

have to? So is this an assignment or job? Or is this something I can help you with; I like Win32 API programming.

**Sam Granger** · 11-02-2005

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

**maxorator** · 11-03-2005

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...

**jmd15** · 11-03-2005

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.

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