View Compilation Error

0_0_18277422_874.cpp: In function 'int main()':
0_0_18277422_874.cpp:38:40: error: 'Pow' was not declared in this scope
         {if(a+b+c+d<50)n[i++] = Pow(2,a)*Pow(3,b)*Pow(5,c)*Pow(7,d); }
                                        ^