View Compilation Error

0_0_38937658_4566.cpp: In function 'int main()':
0_0_38937658_4566.cpp:31:13: error: 's' was not declared in this scope
   31 |         for(s=0;s<len;s++)
      |             ^
0_0_38937658_4566.cpp:32:13: error: 'result' was not declared in this scope
   32 |             result[s]=test[s]-'0';
      |             ^~~~~~
0_0_38937658_4566.cpp:33:13: error: 's' was not declared in this scope
   33 |         for(s=0;s<len;s++)
      |             ^