Compilare: user.cpp: In function ‘int main()’: user.cpp:42:13: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int ok=0; ^ user.cpp:27:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin ,"%d%d" ,&m , &n); ^ user.cpp:30:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin ,"%d" ,&v[i]); ^ user.cpp:35:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin ,"%d" ,&a[i]); ^