View Compilation Error

0_0_28478392_7103.cpp: In function 'int main()':
0_0_28478392_7103.cpp:25:21: error: expression list treated as compound expression in functional cast [-fpermissive]
   int ("%d %d",&a,&b);
                     ^
0_0_28478392_7103.cpp:25:21: error: cast from 'int*' to 'int' loses precision [-fpermissive]
0_0_28478392_7103.cpp:26:26: error: 'power' was not declared in this scope
   printf("%llf",power(a,b));
                          ^