короче пишу прогу MAIN () { PRINTF("HELLO, WORLD\N"); } далее cc hello.c hello.c:1:24: warning: unknown escape sequence '\N' /usr/lib/gcc-lib/i386-redhat-linux/3.2/../../../crt1.o: In function `_start': /usr/lib/gcc-lib/i386-redhat-linux/3.2/../../../crt1.o(.text+0x18): undefined reference to `main' /tmp/ccTozM2H.o: In function `MAIN': /tmp/ccTozM2H.o(.text+0xf): undefined reference to `PRINTF' collect2: ld returned 1 exit status