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Compilation: Types

You're probably familiar with the idea of types from Python, but C does them quite a bit differently.

In Python, it's OK (but still disgusting) to change the type of a variable:

x = 12345
x = "wow, a new type"
x = False
x = None
x = "ok a string again :'("

In C, changing the type of an existing variable is not allowed:

int main() {
    char *max_threads = "5";

    // call badcop
    // this is illegal
    max_threads = 5;
}