View Compilation Error

0_0_38493097_1622.cpp: In function 'int main()':
0_0_38493097_1622.cpp:30:9: error: expected ';' before 'ex_gcd'
         ex_gcd(b, p,x,y);
         ^
0_0_38493097_1622.cpp:32:5: error: expected ';' before '}' token
     }
     ^