#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <stdint.h>  // for uint64_t (type that is unsigned int, guaranteed to be 64-bits)

// Okay to copy/adapt this code if you understand it.  Correctness if your responsibility.

typedef unsigned char uchar;

void cat_file(char const* filename) {
    FILE* stream = fopen(filename, "r");  // mode is "r" (read), "w" (write), "a" (append)
    for(char ch = fgetc(stream); !feof(stream); ch = fgetc(stream)) {
        fputc(ch, stdout);
    }
    fclose(stream);  // ALWAYS call fclose(…) once for every time you call fopen(…).

    // When reading a file, after you have read the last character in the file, the next
    // time you call fgetc(…), it will return a special value, called EOF (== -1).  Once
    // that has happened, calling feof(…) will return true.  These semantics are delicate.
    //
    // Do not use EOF in your code.
    // If you go online, you will see people use while loops and EOF.  Don't follow that.
}

int main(int argc, char* argv[]) {
    cat_file("animal.txt");
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */