Compilare: main.cpp: In function 'int main()': main.cpp:169:9: warning: left operand of comma operator has no effect [-Wunused-value] p1,p2,p3,p4; ^~ main.cpp:169:12: warning: right operand of comma operator has no effect [-Wunused-value] p1,p2,p3,p4; ^~ main.cpp:169:15: warning: right operand of comma operator has no effect [-Wunused-value] p1,p2,p3,p4; ^~ main.cpp:169:17: warning: right operand of comma operator has no effect [-Wunused-value] p1,p2,p3,p4; ^ main.cpp:23:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ai.in","r",stdin); ^ main.cpp:24:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("ai.out","w",stdout); ^ main.cpp:27:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:28:94: 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%d%d",&a1.x,&a1.y,&a2.x,&a2.y,&b1.x,&b1.y,&b2.x,&b2.y,&c2.x,&c2.y); ^ main.cpp:31:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^ main.cpp:35:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&temp.x,&temp.y); ^