Compilare: user.c: In function ‘main’: user.c:29:10: warning: unused variable ‘m’ [-Wunused-variable] int n, m, i; ^ user.c:29:7: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n, m, i; ^ user.c: In function ‘desc’: user.c:24:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:49:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &nr[i]); ^