运行 ID: 42164

Main.cc: In function ‘int mian()’:
Main.cc:18:8: error: ‘i’ was not declared in this scope
   if(a[i]>0) j++;
        ^
Main.cc:20:6: error: ‘i’ was not declared in this scope
    a[i]--;
      ^
Main.cc:24:3: error: ‘i’ was not declared in this scope
   i++;
   ^