View Compilation Error

0_0_13133227_23675.cpp: In function 'int main()':
0_0_13133227_23675.cpp:60:25: error: 'flag' was not declared in this scope
                         flag=1;
                         ^
0_0_13133227_23675.cpp:64:20: error: 'flag' was not declared in this scope
                 if(flag==1)
                    ^