Originally Posted by ArkM

1. Next time use code tag with the language specifier for code snippets:
[code=cplusplus]
your code
[/code]
2. You accumulate all input file contents line by line in the stringstream sstr variable. Insert cout << sstr.str() << endl; statement after sstr << x; and try this on a small input file. Of course, it's not a desired effect, it's an error. You must replace previous sstr contents by a next line:

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C++ Syntax (Toggle Plain Text)

sstr.str(x);

sstr.str(x);

In actual fact no need in stringstream at all. Use find member function to detect substrung s in input line x. Also change main loop condition:

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C++ Syntax (Toggle Plain Text)

while (getline(ifle,x)) { // use implicit stream to bool conversion
    if (x.find(s) != string::npos) // string::npos - "bad" position.
        cout << x << '\n'; // don't flush cout on every line
}
cout.flush(); // flush cout here

while (getline(ifle,x)) { // use implicit stream to bool conversion if (x.find(s) != string::npos) // string::npos - "bad" position. cout << x << '\n'; // don't flush cout on every line } cout.flush(); // flush cout here

3. Try to assign more sensible names for your variables...
That's all...

Originally Posted by Headerandy

thanx ArkM my programme is now more efficient but it is still leaving first six -eight line for example my first line consist of ID but when I searched for this it started showing the contnts from eight line is that me who is making mistake or really this is true.............I'm sending an attachment of file which I had tried to read...............

Originally Posted by ArkM

Simply present your code (with code tags ) and problems description. Try to become familiar with your C++ installation debugger as soon as possible.

Good luck!