Compilare: user.cpp: In function ‘int main()’: user.cpp:42:31: 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:43:33: 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:47:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d%c",&m,&n,&c); ^ user.cpp:50:16: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp:70:21: warning: ‘pr.poz::y’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(pr.x,pr.y,r); ^ user.cpp:74:21: warning: ‘pj.poz::x’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(pj.x,pj.y,j); ^ user.cpp:70:21: warning: ‘pr.poz::x’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(pr.x,pr.y,r); ^ user.cpp:74:21: warning: ‘pj.poz::y’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee(pj.x,pj.y,j); ^ /tmp/ccUy7jlC.o: In function `main': user.cpp:(.text.startup+0xb0): warning: the `gets' function is dangerous and should not be used.