foo.cc: In function 'int main()':
foo.cc:8:42: error: expected ';' before '\U0000ff1b'
    8 |         std::cout<<"请输入一个十进制数："；
      |                                          ^~
      |                                          ;
foo.cc:12:17: error: expected ';' before '}' token
   12 |         return 0
      |                 ^
      |                 ;
   13 | }
      | ~                
foo.cc:5:9: warning: unused variable 'bin' [-Wunused-variable]
    5 |     int bin=0;
      |         ^~~
foo.cc:6:13: warning: unused variable 'dec' [-Wunused-variable]
    6 |         int dec=0;
      |             ^~~

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