Compilare: user.cpp: In function ‘int main()’: user.cpp:13:14: warning: variable ‘O’ set but not used [-Wunused-but-set-variable] punct a,b,c,O; ^ user.cpp:14:9: warning: unused variable ‘rax’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:13: warning: unused variable ‘rbx’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:17: warning: unused variable ‘rcx’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:21: warning: unused variable ‘ray’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:25: warning: unused variable ‘rby’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:29: warning: unused variable ‘rcy’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:33: warning: unused variable ‘i’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:14:35: warning: unused variable ‘j’ [-Wunused-variable] double rax,rbx,rcx,ray,rby,rcy,i,j,la,lb,lc,a1,b1,c1; ^ user.cpp:15:6: warning: unused variable ‘ok’ [-Wunused-variable] int ok; ^ user.cpp:18:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bruiaj.in","r",stdin); ^ user.cpp:19:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bruiaj.out","w",stdout); ^ user.cpp:20:64: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf %lf %lf %lf %lf",&a.x,&a.y,&b.x,&b.y,&c.x,&c.y); ^