Discuss / Java / 打卡～～
Back

打卡～～

Topic source

用户5527594890

#1 Created at ... [Delete] [Delete and Lock User]

System.out.println("Input your last grades:");

Double last_grades = sc.nextDouble();

System.out.println("Input your this grades:");

Double this_grades = sc.nextDouble();

double increase = (this_grades-last_grades)/last_grades;

System.out.printf("%.2f",increase*100);

System.out.println("%");

皮塔莫拉克

#2 Created at ... [Delete] [Delete and Lock User]

成绩是int型时，输出的百分比就是0.00%。什么原因呢？

紫老gsdioj

#3 Created at ... [Delete] [Delete and Lock User]

整形运算只保留整数部分，小数无论多少都不会保留

比如：1 / 4=0，而不是0.25。

可以 float increase = (float)(this_grades- last_grades)/this_grades;

皮塔莫拉克

#4 Created at ... [Delete] [Delete and Lock User]

嗯多谢，已解决~

  • 1

Reply