Compilare: user.cpp: In function ‘bool inters(double, double, double)’: user.cpp:52: warning: unused variable ‘c1’ user.cpp:52: warning: unused variable ‘c2’ user.cpp: In function ‘int main()’: user.cpp:106: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:109: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:144: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result