Compilare: user.cpp: In function ‘long long int sum(int, int)’: user.cpp:12: warning: unused variable ‘j’ user.cpp: In function ‘int main()’: user.cpp:45: warning: format ‘%lld’ expects type ‘long long int’, but argument 3 has type ‘int’ user.cpp:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result