Compilare: user.cpp: In function ‘int main()’: user.cpp:47:30: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(b[i].x>=b[j].x&&b[i].x<=b[j].y||b[i].y>=b[j].x&&b[i].y<=b[j].y) q++; ^ user.cpp:24:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ben.in","r",stdin); ^ user.cpp:25:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ben.out","w",stdout); ^ user.cpp:26:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:29:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&b[i].x,&b[i].y); ^