View Compilation Error

0_0_17970024_19480.cpp: In function 'int main()':
0_0_17970024_19480.cpp:13:9: error: 'flag' was not declared in this scope
         flag = 0;
         ^
0_0_17970024_19480.cpp: At global scope:
0_0_17970024_19480.cpp:70:1: error: expected declaration before '}' token
 }
 ^