Compilare: user.cpp: In function ‘int main()’: user.cpp:9:9: warning: unused variable ‘n’ [-Wunused-variable] int n,m,na=0,x,y; ^ user.cpp:9:11: warning: unused variable ‘m’ [-Wunused-variable] int n,m,na=0,x,y; ^ user.cpp:9:13: warning: unused variable ‘na’ [-Wunused-variable] int n,m,na=0,x,y; ^ user.cpp:9:18: warning: unused variable ‘x’ [-Wunused-variable] int n,m,na=0,x,y; ^ user.cpp:9:20: warning: unused variable ‘y’ [-Wunused-variable] int n,m,na=0,x,y; ^ user.cpp:7:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.in","r",stdin); ^ user.cpp:8:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("pariuri.out","w",stdout); ^