foo.cc: In function ‘int main()’:
foo.cc:16:9: error: ‘in’ was not declared in this scope; did you mean ‘int’?
   16 |         in S=0;
      |         ^~
      |         int
foo.cc:19:25: error: ‘S’ was not declared in this scope
   19 |                         S=S+i;
      |                         ^
foo.cc:22:12: error: ‘S’ was not declared in this scope
   22 |         if(S==num){
      |            ^

正在同步测试数据，请稍后