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

int main(int argc, char* argv[]) {
    int a = 10;
    int b = 0xa;  // C integer constant written in hexadecimal (base 16) notation.
    int c = 012;  // C integer constant written in octal       (base 8)  notation.
    int d = '\n'; // '\n' is a C character constant with value 10.
                  // GCC (or any other C compiler) does not care if you write it as
                  // '\n' (with single quotes) or as 10 (no quotes of any kind).
                  // 
                  // WE do care.  Use a character constant if you are referring to a
                  // character or a character's value.  Use an integer constant 10 only
                  // if you are referring to a number of something (i.e., 10 of something).
    
    int e = 10 + 0xa + 012 + '\n';
    int e = e + e + e;
    printf("e ==   %d\n", e);
    printf("e == 0x%x\n", e);
    printf("e ==  0%o\n", e);

    
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */