Compilare: user.cpp: In function ‘int bs(int)’: user.cpp:28:27: warning: unused variable ‘last’ [-Wunused-variable] int st = 1, dr = n, med, last = -1; ^ user.cpp: In function ‘int main()’: user.cpp:49:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:52:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &a[i]); ^