View Compilation Error

1_868_2969_28070.cpp: In function 'int main()':
1_868_2969_28070.cpp:23:23: error: expected ';' before ')' token
         scanf("%d",&n))
                       ^
1_868_2969_28070.cpp:38:9: error: 'ans' was not declared in this scope
         ans=num[1]*num[2]*num[3]*num[4];
         ^