/in/foo.c: In function 'main':
/in/foo.c:11:2: warning: implicit declaration of function 'prinf' [-Wimplicit-function-declaration]
  prinf("%d %d",zero,right);
  ^~~~~
/tmp/ccu32k6W.o: In function `main':
foo.c:(.text.startup+0xa4): undefined reference to `prinf'
collect2: error: ld returned 1 exit status