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  1. #include <iostream>
  2. #include <iomanip> // for std::setprecision
  3.  
  4. int main() {
  5.     // 원의 반지름
  6.     double radius = 4.0;
  7.     // 원주율
  8.     double pi = 3.14;
  9.  
  10.     // 원의 넓이 계산
  11.     double area = pi * radius * radius;
  12.  
  13.     // 결과를 소수점 이하 둘째 자리에서 반올림하여 첫째 자리까지 출력
  14.     std::cout << std::fixed << std::setprecision(1) << area << std::endl;
  15.  
  16.     return 0;
  17. }
  18.  
Success #stdin #stdout 0.01s 5288KB
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50.2
https://ideone.com/8Av8fT
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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