[笔试真题]人命币转换

秒速五厘米 2023-07-01 03:24 14阅读 0赞

import java.util.Scanner;
    
    public class Main {
        
        private final static char[] NUM = {
        '零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖', '拾',
                '佰', '仟', '万', '亿'};
    
        public static void main(String[] args) {
        
            Scanner scanner = new Scanner(System.in);
            double d = scanner.nextDouble();
            System.out.println(convert(d));
        }
        private static String convert(double d) {
        
            long n = (long) d;
    
            StringBuilder builder = new StringBuilder("人民币");
    
            // 处理整数部分，前提是整数部分大于0
            if (n > 0) {
        
                convert(n, builder);
                builder.append('元');
            }
            // 加上0.0001是为了防止d*100发生失真
            int v = (int) (d * 100 - n * 100 + 0.0001);
            int i = v / 10;
            int j = v % 10;
    
            if (i == 0 && j == 0) {
        
                builder.append('整');
    
                return builder.toString();
            }
    
            if (i != 0) {
        
                builder.append(NUM[i]).append('角');
            }
    
            if (j != 0) {
        
                builder.append(NUM[j]).append('分');
            }
    
    
            return builder.toString();
        }
    
        private static void convert(long n, StringBuilder builder) {
        
            // 大于一亿
            if (n >= 1_0000_0000) {
        
                long q = n / 1_0000_0000;
                long r = n % 1_0000_0000;
    
                convert(q, builder);
                builder.append('亿');
    
                // 是亿的整数倍
                if (r != 0) {
        
                    convert(r, builder);
                }
            }
            // 大于一万
            else if (n >= 1_0000) {
        
                long q = n / 1_0000;
                long r = n % 1_0000;
    
                convert(q, builder);
                builder.append('万');
    
                // 是亿的整数倍
                if (r != 0) {
        
    
                    if (r < 100) {
        
                        builder.append('零');
                    }
    
                    convert(r, builder);
                }
            }
            // 大于一千
            else if (n >= 1000) {
        
                long q = n / 1000;
                long r = n % 1000;
    
                convert(q, builder);
                builder.append('仟');
    
                // 是亿的整数倍
                if (r != 0) {
        
    
                    if (r < 100) {
        
                        builder.append('零');
                    }
    
                    convert(r, builder);
                }
            }
            // 大于一百
            else if (n >= 100) {
        
                long q = n / 100;
                long r = n % 100;
    
                convert(q, builder);
                builder.append('佰');
    
                // 是亿的整数倍
                if (r != 0) {
        
    
                    if (r < 10) {
        
                        builder.append('零');
                    }
    
                    convert(r, builder);
                }
            }
            // 大于十
            else if (n >= 10) {
        
                long q = n / 10;
                long r = n % 10;
    
                if (q > 1) {
        
                    convert(q, builder);
                }
                builder.append('拾');
    
                // 是亿的整数倍
                if (r != 0) {
        
                    convert(r, builder);
                }
    
            } else {
        
                builder.append(NUM[(int) n]);
            }
        }
    }