Compilare: user.cpp: In function ‘bool int_tr(const point&, const point&, const point&, const point&)’: user.cpp:35:19: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x>=0 && y>=0 && z>=0 || x<0 && y<0 && z<0) ^ user.cpp: In function ‘int main()’: user.cpp:42:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qtri.in","r",stdin); ^ user.cpp:43:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("qtri.out","w",stdout); ^ user.cpp:46:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:49:60: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d%d%d%d%d",&ax,&ay,&bx,&by,&cx,&cy,&dx,&dy); ^