我输入了正确的值，但是打印了错误的值。 （*商号显示到小数点后第一位。）
System.out.printf ("What is quotient of %d / %d ? ", n1, n2);
double answer1 = s.nextDouble(); //enter quotient
System.out.printf("What is remainder of %d / %d ? ", n1, n2);
double answer2 = s.nextDouble(); //enter remainder
if ((quotient == answer1) && (((n1-(quotient*n2)) == answer2)))
System.out.print("Correct!");
else { System.out.print("Incorrect: "); //error point I think
System.out.printf("%d / %d = %f, Remainder: %f \n", n1, n2, quotient, (n1-(quotient*n2))); }
当问题是6/7时，如果我输入正确答案0.8，而其余的0.4，则显示“错误：6/7 = 0.800000，余数：0.400000”，而不是“正确！”。我该怎么办？
最佳答案
这是由于浮点运算和精度。差异可能在逗号后的第十位。因此，不应将浮点数与==进行比较，而应检查它们的差值是否低于某个阈值。
double a = ...;
double b = ...;
if (Math.abs(a-b) < 0.0001) {
//Consider as equal
} else {
//Consider as unequal
}