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

int main(int argc, char* argv[]) {
    // we do not have to make a separate variable
    char const* filename = "example.txt";
    // open the file in write mode
    FILE* file = fopen(filename, "w");

    // write 3 characters
    fputc('A', file);
    fputc('B', file);
    fputc('C', file);

    // close the file so we no longer are reserving it in the OS
    fclose(file);
    return EXIT_SUCCESS;
}
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