Compilare: user.cpp: In function ‘int main()’: user.cpp:65:10: warning: unused variable ‘semn’ [-Wunused-variable] char semn; ^ user.cpp:66:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&n); ^ user.cpp:69:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&v[i]); ^