View Compilation Error

0_0_33526219_32053.cpp: In function 'll gcd(ll, ll)':
0_0_33526219_32053.cpp:19:42: error: expected ')' at end of input
 ll gcd(ll a,ll b){ return b==0?a:gcd(b,a%b
                                          ^
0_0_33526219_32053.cpp:19:42: error: expected ';' at end of input
0_0_33526219_32053.cpp:19:42: error: expected '}' at end of input