Take Full Control on Files

[rock3t]

Hi there,

i have writing program which takes file name(full path) and do some modification on these file.

Assuming we have a file that ready to work.
file.txt:
name id age
name id age
name id age
name id age

if i wanna change the id to specific string what function should i use?

My code:

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main(){
	ifstream file("file.txt");
	string buffer;

	
	getline(file, buffer);
	/*
	
		Here i will change buffer's content to do( modification )
	*/
	cout<<buffer<<endl; // print out our new data
	file.close();
	return 0;
}

[paulthepenguin]

Read in the information, change it to what you want it to be, and re-output it into the file. In case you didn't know the syntax for outputting data to a file is 'ofstream name << "Your string or data here" ofstream name is the name of the ofstream (output file stream) you declare. For instance:

ofstream uselessInfo("Example.txt");
uselessInfo << "This is a string";

Writes "This is a string" to Example.txt.