/in/foo.c: In function 'main':
/in/foo.c:8:9: warning: implicit declaration of function 'prinf'; did you mean 'printf'? [-Wimplicit-function-declaration]
    8 |         prinf("%.2f\n", c);
      |         ^~~~~
      |         printf
/usr/bin/ld: /tmp/ccDz6lY5.o: in function `main':
foo.c:(.text.startup+0x3a): undefined reference to `prinf'
collect2: error: ld returned 1 exit status