Compilare: main.cpp: In function 'void get_P(double, double, double, POINT, POINT, POINT, double)': main.cpp:28:19: warning: unused variable 'x1' [-Wunused-variable] double delta , x1 , x2; ^~ main.cpp:28:24: warning: unused variable 'x2' [-Wunused-variable] double delta , x1 , x2; ^~ main.cpp: In function 'void get_point(POINT, POINT, POINT, double)': main.cpp:41:15: warning: unused variable 'x' [-Wunused-variable] double mp , x , y; ^ main.cpp:41:19: warning: unused variable 'y' [-Wunused-variable] double mp , x , y; ^ main.cpp: In function 'int main()': main.cpp:91:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("expand.in" , "r" , stdin); ^ main.cpp:92:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("expand.out" , "w" , stdout); ^ main.cpp:95:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf" , &t , &n , &d); ^ main.cpp:98:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf" , &x , &y); ^