View Compilation Error

0_0_17661674_13185.cpp: In function 'int main()':
0_0_17661674_13185.cpp:10:14: error: 'pow' was not declared in this scope
   d=pow(d,0.5);
              ^
0_0_17661674_13185.cpp:13:9: error: expected '}' at end of input
 return 0;
         ^