joc16.cpp:1:1: warning: null character(s) ignored joc16.cpp:1:1: warning: no newline at end of file /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/../../../crt1.o(.text+0x18): In function `_start': ../sysdeps/i386/elf/start.S:77: undefined reference to `main' collect2: ld returned 1 exit status