Compilare: user.c: In function ‘main’: user.c:12:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.in","r",stdin); ^ user.c:13:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("rj.out","w",stdout); ^ user.c:14:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ user.c:58:19: warning: ‘z’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(lee[cx[p]][cy[p]]+1<z) ^ user.c:51:16: warning: ‘y2’ may be used uninitialized in this function [-Wmaybe-uninitialized] lee[x2][y2]=1; ^ user.c:51:16: warning: ‘x2’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.c:40:14: warning: ‘y1’ may be used uninitialized in this function [-Wmaybe-uninitialized] f[x1][y1]=1; ^ user.c:40:14: warning: ‘x1’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.c:25:15: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(c=='J') ^