Compilare: user.cpp: In function ‘long long int put(long long int, long long int)’: user.cpp:21:12: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (exp&1==0) return put(x*x,exp/2); ^ user.cpp: In function ‘int main()’: user.cpp:94:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("evaluare2.in","r",stdin); ^ user.cpp:95:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("evaluare2.out","w",stdout); ^ user.cpp:97:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccR4969H.o: In function `main': user.cpp:(.text.startup+0x53): warning: the `gets' function is dangerous and should not be used.