Compilare: user.c: In function ‘main’: user.c:8: warning: passing argument 2 of ‘fopen’ makes pointer from integer without a cast /usr/include/stdio.h:249: note: expected ‘const char * __restrict__’ but argument is of type ‘int’ user.c:9: warning: passing argument 2 of ‘fopen’ makes pointer from integer without a cast /usr/include/stdio.h:249: note: expected ‘const char * __restrict__’ but argument is of type ‘int’ user.c:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result