Compilare: user.cpp: In function ‘int main()’: user.cpp:22:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in", "r", stdin); ^ user.cpp:23:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.out", "w", stdout); ^ user.cpp:121:37: warning: ‘ymin’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<tmin<<' '<<xmin<<' '<<ymin; ^ user.cpp:121:22: warning: ‘xmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] cout<<tmin<<' '<<xmin<<' '<<ymin; ^ user.cpp:91:17: warning: ‘yj’ may be used uninitialized in this function [-Wmaybe-uninitialized] c[1].col= yj; ^ user.cpp:90:17: warning: ‘xj’ may be used uninitialized in this function [-Wmaybe-uninitialized] c[1].lin= xj; ^ user.cpp:62:17: warning: ‘yr’ may be used uninitialized in this function [-Wmaybe-uninitialized] c[1].col= yr; ^ user.cpp:61:17: warning: ‘xr’ may be used uninitialized in this function [-Wmaybe-uninitialized] c[1].lin= xr; ^