prog.c: In function ‘main’:
prog.c:8:1: warning: implicit declaration of function ‘prinf’ [-Wimplicit-function-declaration]
prinf("%f", area);
^~~~~
/home/lhVi0s/cclV8eh9.o: In function `main':
prog.c:(.text.startup+0x52): undefined reference to `prinf'
collect2: error: ld returned 1 exit status