reading from stdin in c++

c++

Solution

You have not defined the variable `input_line`.

Add this:

string input_line;

And add this include.

#include <string>

Here is the full example. I also removed the semi-colon after the while loop, and you should have `getline` inside the while to properly detect the end of the stream.

#include <iostream>
#include <string>

int main() {
    for (std::string line; std::getline(std::cin, line);) {
        std::cout << line << std::endl;
    }
    return 0;
}

Problem

I am trying to read from stdin using C++, using this code ``` #include <iostream> using namespace std; int main() { while(cin) { getline(cin, input_line); cout << input_line << endl; }; return 0; } ``` when i compile, i get this error.. ``` [root@proxy-001 krisdigitx]# g++ -o capture -O3 capture.cpp capture.cpp: In function âint main()â: capture.cpp:6: error: âinput_lineâ was not declared in this scope ``` Any ideas whats missing?

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