calling a spesific line from input file

hi all!!

I am a beginner in C++ and need your help. I am trying to call a specific line from an input file and write it to the screen. can you tell me what the algorithm of it?. f. ex :

a 1 x
b 2 y
c 3 x
d 4 y

how can I get the '3 x' as output if I know the value 'c'.

thanks in advance.

I would try reading the first character (there are a number of functions for this). If it is the 'c' the use getline to read the whole line after the 'c'

thanks for reply.
this is the problem...I do not know how to output the 3 x using either getline or any other algorithm.

If the file is exactly as you have indicated then you could do this:

Code:

---

ifstream fin("file.txt");
char ch;
int  num, dummyInt;
int var, dummyVar;
char found = 'n'

//find first occurence of ch with value of 'c'
while(fin && found == 'n')
{
  fin >> ch;
  if(ch == 'c')
  {
    fin >> num;
    fin >> var;
    found = 'y';
  }
    else
    {
      fin >> dummyInt;
      fin >> dummyVar;
    }
}
//proceed with rest of program.

---

this is what I needed.
I have just applied your solution and it worked!!
thanks a lot.!!