#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

int main(int argc, char* argv[]) {
    printf("Hello World! (stdout)\n");  // printf(…) always writes to stdout
    // stdout is a "stream" (object you can write to and/or read from)
    // stdout usually displays on your screen.  It is for normal output.

    fprintf(stderr, "Hello World!  Something is wrong.  (stderr)\n");
    // stderr also displays on your screen, but is for error messages and abnornal output.

    return EXIT_SUCCESS;
}
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