C++]소수점 자리 지정해서 출력

#include <iostream>

using namespace std;

double calc(double &input)

{

double cm;

cm = input * 91.44;

return cm;

}

int main()

{

double user_input;

cout << "몇 야드인지 입력하시오. ";

cin >> user_input;

double cm = calc(user_input);

cout << fixed;

cout.precision(1);

cout << user_input << "야드 = " << cm << "cm" << endl;

return 0;

}