Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:14:1: error: ‘f’ was not declared in this scope f>>n ^ user.cpp:15:1: error: expected ‘;’ before ‘for’ for(i=1;i<=n;i++) ^ user.cpp:15:10: warning: statement has no effect [-Wunused-value] for(i=1;i<=n;i++) ^ user.cpp:15:17: error: expected ‘;’ before ‘)’ token for(i=1;i<=n;i++) ^ user.cpp:16:11: warning: statement has no effect [-Wunused-value] for(j=1;j<=m;j++) ^ user.cpp:16:18: error: expected ‘;’ before ‘)’ token for(j=1;j<=m;j++) ^