Compilare: user.cpp: In function ‘void rezolva()’: user.cpp:50:9: warning: unused variable ‘nrx’ [-Wunused-variable] int nrx=0,nry=0,nrz=0,nrofx,nrofy,nrofz; ^ user.cpp:50:15: warning: unused variable ‘nry’ [-Wunused-variable] int nrx=0,nry=0,nrz=0,nrofx,nrofy,nrofz; ^ user.cpp:50:21: warning: unused variable ‘nrz’ [-Wunused-variable] int nrx=0,nry=0,nrz=0,nrofx,nrofy,nrofz; ^ user.cpp:50:27: warning: unused variable ‘nrofx’ [-Wunused-variable] int nrx=0,nry=0,nrz=0,nrofx,nrofy,nrofz; ^ user.cpp:50:33: warning: unused variable ‘nrofy’ [-Wunused-variable] int nrx=0,nry=0,nrz=0,nrofx,nrofy,nrofz; ^ user.cpp:50:39: warning: unused variable ‘nrofz’ [-Wunused-variable] int nrx=0,nry=0,nrz=0,nrofx,nrofy,nrofz; ^ user.cpp: In function ‘int main()’: user.cpp:87:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.in","r",stdin); ^ user.cpp:88:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbxyz.out","w",stdout); ^ user.cpp:89:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ user.cpp: In function ‘void rezolva()’: user.cpp:49:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d",&n,&x,&y,&z); ^ user.cpp:60:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n1,&n2); ^ user.cpp: In function ‘int main()’: user.cpp:80:14: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized] dfs2(nod); ^ user.cpp:47:11: note: ‘nod’ was declared here int i,nod; ^