Compilare: main.c: In function 'main': main.c:7:8: warning: passing argument 1 of 'printf' from incompatible pointer type [-Wincompatible-pointer-types] 7 | printf(fout, "%d", a+b); | ^~~~ | | | FILE * In file included from main.c:1: /usr/include/stdio.h:356:43: note: expected 'const char * restrict' but argument is of type 'FILE *' 356 | extern int printf (const char *__restrict __format, ...); | ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~