Compilare: user.cpp: In function ‘void ReadInput()’: user.cpp:45:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:47:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &pts[i].x, &pts[i].y); ^ user.cpp:62:62: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int x1, y1, x2, y2; scanf("%d%d%d%d", &x1, &y1, &x2, &y2); ^