Java算术部门

Question

public class test {
  public static void main(String[] args) {
   int total = 2;
   int rn = 1;
   double rnp = (rn / total) * 100;
   System.out.println(rnp);
 }
}

为什么它打印0.0而不是50.0？

https://www.google.com/search?q=100*(1%2F2)&aq=f&oq=100*(1%2F2)

Answer 1

除法发生在整数空间中,没有分数的概念,你需要类似的东西

double rnp = (rn / (double) total) * 100