Thread: file i/o

what search method and what replacing method should i use to search a file for occurances of a word and then replace those occurances with another word?

can you just use getline() then run it through a loop? or am i outta my league?

The function that I use is this:
You may have to create this into a Prototype function or else put inside of a Class.

int msovf::Instr(LPCSTR String,LPCSTR Search)
{
CHAR *sResult;
int iLocation;
sResult = strstr(String,Search);
iLocation = sResult - String;
if(iLocation < 0)
{
return -1;
}
return iLocation;
}


The 'strstr' call searches for text... basically. So you do something like this:

int x = Instr("Where did my car go!?","car");
Then I believe it should return a 12(in this case, otherwise the location of whatever you are looking for). If the instance is not found it should return a -1. I hope that this works to help you with whatever you need it for.

What is grep?

i kinda have to code it the old school way :P

here what i have to date :P
doesnt work yet :P

Code:

#include <iostream.h>
#include <fstream.h>
#include <string.h>

int main()
{
	char filename[20], wordtofind[20], wordtoreplace[20], input[200];
	int length=0,length2=0, count=0, count2=0, temp;
	cout<<"Enter the name of file: ";
	cin>>filename;
	cin.ignore(20,'\n');
	cout<<"Enter word to search for: ";	
	cin.getline(wordtofind,20);
	cout<<"Enter word to replace it with: ";
	cin.getline(wordtoreplace,20);
	length=strlen(wordtofind);
	fstream file;
	file.open(filename,ios::nocreate|ios::in|ios::out);
	if(file.fail()){
		cout<<"File could not be openend"<<endl;
		return (0);
	}
	else{
		while(cin.getline(input,200,'\n'))
		{
			length2=strlen(input);
			for(count=0;count<length2;count++)
			{
				if(input[count]==wordtofind[0]){
					temp=count;
					for(count2=0;count2<=length;count2++)
					{
						if(input[temp++]!=wordtofind[count2])
							break;
						if(count2==length)
						{
							file<<wordtoreplace;
						}
					}
					
				}
			}
		}
		}
	file.close();

	return (0);
}

Refrain from using grep

Coding it urself is much more exciting. It helps sharpen ur skills.

What? oldschool way? Why?

I guess you could just use CopyMemory to copy the string into an array then check it byte by byte... until you find alternatives.

But still... why what you call oldschool?