Reading a full line of input

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is there a way like readLines till CTRL+Z is pressed or something ??

Yes, precisely like this, using the free std::getline function (not the istream method of the same name!):

string line;

while (getline(cin, line)) {
    // do something with the line
}

This will read lines (including whitespace, but without ending newline) from the input until either the end of input is reached or cin signals an error.

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