How To Think Like a Computer Scientist C++ Edition The Pretext Interactive Version

A few sections ago, I said that you can make up any name you want for your variables, but that’s not quite true. There are certain words that are reserved in C++ because they are used by the compiler to parse the structure of your program, and if you use them as variable names, it will get confused. These words, called keywords, include int, char, void, endl and many more.

A list of C++ keywords is availiable publically on cppreference

¹

en.cppreference.com/w/cpp/keyword

.

Rather than memorize the list, I would suggest that you take advantage of a feature provided in many development environments: code highlighting. As you type, different parts of your program should appear in different colors. For example, keywords might be blue, strings red, and other code black.

int main() {
    doublex = 1.0;
    inty = x + 5;
    boolBool;
    strings = "void";
    if (y > x) {
        Bool = true;
    }
    cout << Bool << endl;
}