如何看懂这些程序

/249/5095/HiCk/hello.c:1:19: warning: extra tokens at end of #include directive [enabled by default]
#includeint main(自己动手丰衣足食) { /*在双引号中间输入Hello World*/ printf("Hello World "); return 0; }
                  ^
/usr/lib/gcc/x86_64-redhat-linux/4.8.3/../../../../lib64/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status