View Compilation Error

0_0_39403083_6586.cpp: In function 'int main()':
0_0_39403083_6586.cpp:13:23: error: 'round' was not declared in this scope
   13 |         double cost = round(quantity * pricePerUnit * 10) / 10.0;
      |                       ^~~~~
0_0_39403083_6586.cpp:20:2: error: expected '}' at end of input
   20 | }
      |  ^
0_0_39403083_6586.cpp:6:12: note: to match this '{'
    6 | int main() {
      |            ^