Compilare: main.cpp: In function 'int main()': main.cpp:36:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi2.in","r",stdin); ^ main.cpp:37:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("triunghi2.out","w",stdout); ^ main.cpp:39:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:44:101: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf %lf %lf %lf %lf",&v[i].a.x,&v[i].a.y,&v[i].b.x,&v[i].b.y,&v[i].c.x,&v[i].c.y); ^ main.cpp:51:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%lf %lf",&cv.x,&cv.y); ^