Compilare: user.cpp: In function ‘float fmod2(float, float)’: user.cpp:11:29: warning: operation on ‘a’ may be undefined [-Wsequence-point] return ((a=x/y)-(int)a)*y; ^ user.cpp: In function ‘int main()’: user.cpp:18:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%ld",&n); ^ user.cpp:20:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%f%f",&h,&m); ^