/in/foo.cc: In function 'int main()':
/in/foo.cc:29:61: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   29 |             if (Str[i] == '-' && (i == 0 || jjcc.size() > 0 &&
      |                                             ~~~~~~~~~~~~~~~~^~
   30 |                 (jjcc.back() == '+' || jjcc.back() == '-' ||
      |                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
   31 |                  jjcc.back() == '*' || jjcc.back() == '/'))) {
      |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~