Eroare de compilare: user.cpp:7: error: ‘::main’ must return ‘int’ user.cpp: In function ‘int main()’: user.cpp:16: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’ user.cpp:18: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’ user.cpp:10: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result