Compilare: user.cpp: In function ‘int main()’: user.cpp:21:31: 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:22:33: 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:24:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&m); ^ user.cpp:98:15: warning: ‘j2’ may be used uninitialized in this function [-Wmaybe-uninitialized] cd[1].y=j2; ^ user.cpp:97:15: warning: ‘j1’ may be used uninitialized in this function [-Wmaybe-uninitialized] cd[1].x=j1; ^ user.cpp:75:15: warning: ‘r2’ may be used uninitialized in this function [-Wmaybe-uninitialized] cd[1].y=r2; ^ user.cpp:74:15: warning: ‘r1’ may be used uninitialized in this function [-Wmaybe-uninitialized] cd[1].x=r1; ^