Compilare: user.c: In function ‘main’: user.c:50:5: warning: implicit declaration of function ‘fcloseall’ [-Wimplicit-function-declaration] fcloseall(); ^ user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&T); ^ user.c:16:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] { fscanf(f,"%lld%lld%lld%lld%lld%lld%lld",&x,&y,&z,&a3,&b3,&c3,&n); ^