View Compilation Error

0_0_38644298_4131.cpp: In function 'int main()':
0_0_38644298_4131.cpp:12:7: error: 'pow' was not declared in this scope
   x = pow(x, 2);
       ^~~
0_0_38644298_4131.cpp:12:7: note: suggested alternative: 'putw'
   x = pow(x, 2);
       ^~~
       putw