/in/foo.cc: In function 'int main()':
/in/foo.cc:9:69: error: 'spy' was not declared in this scope
    9 |         for(int i=0;i<9;i++)for(int j=i+1;j<9;j++)if(num[i]+num[j]==spy)for(int k=0;k<9;k++)if(k!=i&&k!=j)cout<<num[k]<<endl;
      |                                                                     ^~~
/in/foo.cc:8:13: warning: unused variable 'jiandie' [-Wunused-variable]
    8 |         int jiandie=total-100;
      |             ^~~~~~~