View Compilation Error

0_0_21802698_25042.cpp: In function 'int main()':
0_0_21802698_25042.cpp:62:20: error: 'flag' was not declared in this scope
                 if(flag)
                    ^
0_0_21802698_25042.cpp: At global scope:
0_0_21802698_25042.cpp:75:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_21802698_25042.cpp:76:1: error: expected declaration before '}' token
 }
 ^