View Compilation Error

0_0_4762701_20333.cpp: In function `int main()':
0_0_4762701_20333.cpp:87: error: `flag' undeclared (first use this function)
0_0_4762701_20333.cpp:87: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4762701_20333.cpp:92: error: `dis' undeclared (first use this function)