Compilare: main.cpp: In function 'int main()': main.cpp:10:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j,k,l,sumxor=0; ^ main.cpp:10:15: warning: unused variable 'k' [-Wunused-variable] int n,i,j,k,l,sumxor=0; ^ main.cpp:10:17: warning: unused variable 'l' [-Wunused-variable] int n,i,j,k,l,sumxor=0; ^ main.cpp:11:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("joc3.in","r",stdin); ^ main.cpp:12:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("joc3.out","w",stdout); ^ main.cpp:13:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:16:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^