/in/foo.c: In function 'main':
/in/foo.c:7:5: error: stray '\357' in program
  for（i=0;i<n;i++）
     ^
/in/foo.c:7:6: error: stray '\274' in program
  for（i=0;i<n;i++）
      ^
/in/foo.c:7:7: error: stray '\210' in program
  for（i=0;i<n;i++）
       ^
/in/foo.c:7:8: error: expected '(' before 'i'
  for（i=0;i<n;i++）
        ^
/in/foo.c:7:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for（i=0;i<n;i++）
  ^~~
/in/foo.c:7:12: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for（i=0;i<n;i++）
            ^
/in/foo.c:7:13: warning: statement with no effect [-Wunused-value]
  for（i=0;i<n;i++）
            ~^~
/in/foo.c:7:19: error: stray '\357' in program
  for（i=0;i<n;i++）
                   ^
/in/foo.c:7:20: error: stray '\274' in program
  for（i=0;i<n;i++）
                    ^
/in/foo.c:7:21: error: stray '\211' in program
  for（i=0;i<n;i++）
                     ^
/in/foo.c:8:2: error: expected ';' before '{' token
  {
  ^
/in/foo.c:5:15: warning: unused variable 'Sn' [-Wunused-variable]
     int a,n,i,Sn=0;
               ^~