View Compilation Error

0_0_39808807_6487.cpp: In function 'int main()':
0_0_39808807_6487.cpp:12:41: error: expected initializer before '>>' token
   12 |                 long double mb; int cin >> mb >> perc;
      |                                         ^~
0_0_39808807_6487.cpp:13:41: error: 'perc' was not declared in this scope
   13 |                 allmb += mb * ((100.0 - perc) / 100.0);
      |                                         ^~~~