Compilare: user.cpp: In function ‘float sqrt(float)’: user.cpp:6:39: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] unsigned int i = *(unsigned int*) &x; ^ user.cpp:11:22: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] return *(float*) &i; ^ user.cpp: In function ‘int main()’: user.cpp:15:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("maxd.in","r",stdin); ^ user.cpp:16:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("maxd.out","w",stdout); ^ user.cpp:17:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&a,&b); ^