View Compilation Error

0_0_17673922_14470.cpp: In function 'int main()':
0_0_17673922_14470.cpp:15:10: error: expected ';' before 'flag'
     true flag;
          ^
0_0_17673922_14470.cpp:30:9: error: 'flag' was not declared in this scope
         flag=false;
         ^