Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:26:5: error: ‘cin’ was not declared in this scope cin.close(); ^ user.cpp:27:5: error: ‘cout’ was not declared in this scope cout.close(); ^ user.cpp:20:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.cpp:23:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a,&b); ^