Compilare: main.cpp: In function 'int main()': main.cpp:8:9: warning: unused variable 'n' [-Wunused-variable] int n,i,j,x,nr=0; ^ main.cpp:8:11: warning: unused variable 'i' [-Wunused-variable] int n,i,j,x,nr=0; ^ main.cpp:8:13: warning: unused variable 'j' [-Wunused-variable] int n,i,j,x,nr=0; ^ main.cpp:8:15: warning: unused variable 'x' [-Wunused-variable] int n,i,j,x,nr=0; ^ main.cpp:8:17: warning: unused variable 'nr' [-Wunused-variable] int n,i,j,x,nr=0; ^~ main.cpp:6:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("loto2.in","r",stdin); ^ main.cpp:7:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("loto2.out","w",stdout); ^