/in/foo.c:1:2: error: invalid preprocessing directive #include\U0000ff1ciostream\U0000ff1e
    1 | #include＜iostream＞
      |  ^~~~~~~~~~~~~~~~~~~
/in/foo.c:2:1: error: unknown type name 'using'
    2 | using namespace std;
      | ^~~~~
/in/foo.c:2:17: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'std'
    2 | using namespace std;
      |                 ^~~
/in/foo.c: In function 'main':
/in/foo.c:5:5: error: 'cin\U0000ff1e\U0000ff1ex\U0000ff1e\U0000ff1ey' undeclared (first use in this function)
    5 |     cin＞＞x＞＞y;
      |     ^~~~~~~~~~~~~
/in/foo.c:5:5: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:6:5: error: 'cout\U0000ff1c\U0000ff1cx' undeclared (first use in this function)
    6 |     cout＜＜x+y;
      |     ^~~~~~~~~
/in/foo.c:4:9: warning: unused variable 'x' [-Wunused-variable]
    4 |     int x,y;
      |         ^