View Compilation Error

0_0_25737910_29881.cpp: In function 'int main()':
0_0_25737910_29881.cpp:32:17: error: 'flag' was not declared in this scope
                 flag = false;
                 ^
0_0_25737910_29881.cpp:36:12: error: 'flag' was not declared in this scope
         if(flag)
            ^