/in/foo.c: In function 'main':
/in/foo.c:16:21: error: stray '\357' in program
                 s2++；//充裕堆
                     ^
/in/foo.c:16:22: error: stray '\274' in program
                 s2++；//充裕堆
                      ^
/in/foo.c:16:23: error: stray '\233' in program
                 s2++；//充裕堆
                       ^
/in/foo.c:17:13: error: expected ';' before 'sum'
             sum^=x;
             ^~~