Compilare: user.cpp: In function ‘int main()’: user.cpp:35:9: warning: unused variable ‘poz’ [-Wunused-variable] int poz; ^ user.cpp:45:9: warning: unused variable ‘act’ [-Wunused-variable] int act = u[m]; ^ user.cpp:29:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:31:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^