View Compilation Error

0_0_21874587_30600.cpp: In function 'int main()':
0_0_21874587_30600.cpp:14:3: error: 's1' was not declared in this scope
   s1 = ".*";
   ^
0_0_21874587_30600.cpp:15:3: error: 's2' was not declared in this scope
   s2 = "(.)\\1*";
   ^
0_0_21874587_30600.cpp:18:16: error: 'p' is not a class, namespace, or enumeration
   while(pos != p::npos){
                ^