Compilare: user.c: In function ‘main’: user.c:18: warning: passing argument 1 of ‘fclose’ from incompatible pointer type /usr/include/stdio.h:214: note: expected ‘struct FILE *’ but argument is of type ‘char *’ user.c:19: warning: passing argument 1 of ‘fclose’ from incompatible pointer type /usr/include/stdio.h:214: note: expected ‘struct FILE *’ but argument is of type ‘char *’ user.c:10: warning: ignoring return value of ‘fopen’, declared with attribute warn_unused_result user.c:11: warning: ignoring return value of ‘fopen’, declared with attribute warn_unused_result user.c:12: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:15: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result