Why does this work in C++ but not C=?iso-8859-1?Q?=3F_=96_stackoverflow.com?=

Why does this work in C++ but not C? – stackoverflow.com

I'm using Visual C++ 2012 and compiling from the command line the
following files: #include <stdio.h> int main() { printf("%.5f",
18/4+18%4); return 0; } Linking with MSVCRT.LIB ...