Compilare: user.cpp: In function ‘int main()’: user.cpp:40:17: warning: unused variable ‘u’ [-Wunused-variable] int n,m,i,j,u=0,mod=1000000,le; ^ user.cpp:40:33: warning: unused variable ‘le’ [-Wunused-variable] int n,m,i,j,u=0,mod=1000000,le; ^ user.cpp: In function ‘void citeste(int&)’: user.cpp:21:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,dim,stdin); ^ user.cpp:31:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,dim,stdin); ^ user.cpp: In function ‘int main()’: user.cpp:38:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc4.in","r",stdin); ^ user.cpp:39:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cerc4.out","w",stdout); ^ user.cpp:42:28: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,dim,stdin); ^