You can use the method p. Using p is actually equivalent of using puts + inspect on an object. humans = %w( foo bar baz ) p humans # => [“foo”, “bar”, “baz”] puts humans.inspect # => [“foo”, “bar”, “baz”] But keep in mind p is more a debugging tool, it should not be used … Read more
Typically one would use fputs() instead of puts() to omit the newline. In your code, the puts(input); would become: fputs(input, stdout);
printf(“Hello World!”); is IMHO not vulnerable but consider this: const char *str; … printf(str); If str happens to point to a string containing %s format specifiers, your program will exhibit undefined behaviour (mostly a crash), whereas puts(str) will just display the string as is. Example: printf(“%s”); //undefined behaviour (mostly crash) puts(“%s”); // displays “%s\n”
puts is simpler than printf but be aware that the former automatically appends a newline. If that’s not what you want, you can fputs your string to stdout or use printf.