searching from a file

[raps]

if in a file there are some data like as:

red 10 40
yellow 20 50
green 30 60

then if i give input from keyboard :green

then output will be :
30 60

but how can i do it ??

[o3hC5Di1]

Hi there,

You will first have to open the file, then read it line by line, and if the first word of the line is what you are searching for, return the rest of the line.

For more information:
http://cplusplus.com/doc/tutorial/files/
http://cplusplus.com/reference/iostream/fstream/

If you require any further assistance, please at least try by yourself and get back to us with your attempted code so we can check whether your understanding is correct or not.

All the best,
NwN

[IWishIKnew]

by paying attention in class.

[raps]

#include <iostream>
#include <fstream>

#include<string.h>
#include<conio.h>
using namespace std;

int main () {
	int x=0,m;
  char line[30];
  char a[50];
  ifstream myfile ("example.txt") ;
  
  if (myfile.is_open())
  {
	  while ( myfile.good())
    {
      myfile.getline (line,30);

	
	  bb:
	  cin>>a;
	  int len=strlen(a);
	  
	  for (int i=0;i<=30;i++)
	  { 
		 
		  if (a[0]==line[i])
		  {
			for(int d=i;d<len+i; d++)
			{
				if(a[x]==line[d])
					{
										if(d==len-1+i)
										{
										  cout<<a<<"   ";
										}
									}
				else
				{ break;}
					x=x+1;
			}
			x=x*0;
		  }
		  
	  }
	 
    }
    myfile.close();
  }
  cout<<"if you want to search another name please #PRESS 1#\nOtherwise #PRESS 0#";
 cin>>m;
if(m==1)
{goto bb;
}
else
goto cc;
cc:
  getch();
  return 0;
}

[file: example.txt]

red green blue
yellow



by this code i can search any string from first line but i can't search from the next line.
such as i can find red or green or blue but i can't find yellow

how can i do it???

[IWishIKnew]

Thats because your code only gets the first line, and you really shouldn't use goto at all. It's bad programming.

Also, instead of x = (x * 0), just do x = 0;.

Also, you would know how to do it if you used your brain. Go through the steps in your head, then find the steps you don't know how to do and ask us more specifically what you want. We are not going to do your homework for you.

Hint: It's in the algorithm.

And btw, i would advise that you pay more attention in class. Your code is poorly indented and formatted. It almost feels like I'm trying to read the handwriting of a 1st grader.

Sorry if I come on a bit harsh, but you should be learning these things, they are the BASICS.