foo.cpp:20:3: error: stray '\243' in program
   return 0；
   ^
foo.cpp:20:3: error: stray '\273' in program
foo.cpp:4:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
foo.cpp: In function 'int main()':
foo.cpp:21:1: error: expected ';' before '}' token
 }
 ^