作业
Topic sourcepublic class liushu {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in); // 创建Scanner对象
System.out.print("Input your last score: "); // 打印提示
int fscore = scanner.nextInt(); // 读取一行输入并获取字符串
System.out.print("Input your this score: "); // 打印提示
int tscore = scanner.nextInt(); // 读取2行输入并获取整数
float a=(float)(tscore-fscore)/(float)fscore;
System.out.printf("Hi, you core up%.2f%%\n", a*100); // 格式化输出
}
}
修改下：
public class liushu {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in); // 创建Scanner对象
System.out.print("Input your last score: "); // 打印提示
float fscore = scanner.nextFloat(); // 读取一行输入并获取字符串
System.out.print("Input your this score: "); // 打印提示
float tscore = scanner.nextFloat(); // 读取2行输入并获取整数
float a=(tscore-fscore)/fscore;
System.out.printf("Hi, you core up%.2f%%\n", a*100); // 格式化输出
System.out.printf("Hi, you core up%.2f%%\n", a*100); // 格式化输出
为什么在2f后面跟两个百分号呢？而不是一个呢？麻烦解答一下，有点不太明白谢谢
- 1
独孤伶俜233
//练习
//请帮小明同学设计一个程序，
//输入上次考试成绩（int）和本次考试成绩（int），
//然后输出成绩提高的百分比，保留两位小数位（例如，21.75%）
int last, score;
double res = .0;
System.out.print("plase input your last score: ");
last = scanner.nextInt();
System.out.print("plase input your score: ");
score = scanner.nextInt();
if (last < score){
res = (double)score / (double)last;
System.out.print("上升了:");
}
else if (last > score){
res = (double)last / (double)score;
System.out.print("下降了:");
}
else{
System.out.print("没有变化:");
}
res = res * 100.0;
System.out.printf("%.2f%%", res);