View Compilation Error

0_0_39832224_3716.cpp: In function 'int main()':
0_0_39832224_3716.cpp:7:34: error: 'sqrt' was not declared in this scope
    7 |                 printf("%.2f\n", sqrt((a - c) * (a - c) + (b - d) * (b - d)));
      |                                  ^~~~