View Compilation Error

0_0_21951012_29199.cpp: In function 'int main()':
0_0_21951012_29199.cpp:7:63: error: 'sqert' was not declared in this scope
           prtinf("%.2lf\n",sqert(pow((x1-x2),2)+pow((y1-y2),2));
                                                               ^