Compilare: user.cpp:1:19: warning: extra tokens at end of #include directive user.cpp:2: warning: ISO C++ forbids declaration of ‘main’ with no type user.cpp: In function ‘int main()’: user.cpp:8: warning: format ‘%d’ expects type ‘int*’, but argument 3 has type ‘int’ user.cpp:8: warning: too many arguments for format user.cpp:8: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:8: warning: ‘a’ is used uninitialized in this function user.cpp:8: warning: ‘b’ is used uninitialized in this function