Compilare: user.cpp: In function ‘int main()’: user.cpp:36:25: warning: unused variable ‘rezultat’ [-Wunused-variable] long long a, b, c, rezultat = 0; ^ user.cpp:33:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("classictask.in", "r", stdin); ^ user.cpp:34:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("classictask.out", "w", stdout); ^ user.cpp:37:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld %lld %lld", &a, &b, &c); ^