Compilare: user.cpp: In function ‘long long int power(unsigned int, unsigned int)’: user.cpp:17: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘long double sum(int, int)’: user.cpp:56: warning: unused variable ‘suma’ user.cpp:56: warning: unused variable ‘num’ user.cpp: In function ‘int main()’: user.cpp:70: warning: unused variable ‘suma’ user.cpp:73: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:74: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:75: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result