View Compilation Error

0_0_19705503_1866.cpp: In function 'int main()':
0_0_19705503_1866.cpp:10:46: error: invalid operands of types 'double' and 'double' to binary 'operator^'
         printf("%.2f\n",sqrt((x3-x1)^2+(x4-x2)^2));
                                              ^