Compilare: user.cpp: In function ‘int main()’: user.cpp:67:18: warning: unused variable ‘d’ [-Wunused-variable] int i, j, s, d, k, xx, yy, b11, b12, b21, b22, ma, mi; ^ user.cpp:67:56: warning: unused variable ‘mi’ [-Wunused-variable] int i, j, s, d, k, xx, yy, b11, b12, b21, b22, ma, mi; ^ user.cpp:64:31: 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); ^ user.cpp:65:33: 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); ^ user.cpp:69:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:70:92: 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",&t.x,&t.y,&s1.x,&s1.y,&s2.x,&s2.y,&r1.x,&r1.y,&r2.x,&r2.y); ^ user.cpp:74:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^ user.cpp:76:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&xx,&yy); ^