Compilare: user.c: In function ‘main’: user.c:15: 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:16: 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:48: warning: passing argument 1 of ‘free’ makes pointer from integer without a cast /usr/include/stdlib.h:488: note: expected ‘void *’ but argument is of type ‘unsigned int’ user.c:18: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:25: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:42: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result