java：递归：10元钱按1，2，5元任意组合
package game;
public class Money {
public static void main(String[] args) {
fun("", 10);
System.out.println("总共算法：" + i);
}
// 10元钱的组成，1，2，5任意组合
public static int i = 1;
public static void fun(String log, int n) {
// int num = n;
if (0 == n) {
System.out.println(log.substring(0, log.length() - 1) + "=");
return;
} else if (1 == n) {
System.out.println(log + "1" + "=");
return;
}
if (n >= 1)
fun(log + "1+", n - 1);
if (n >= 2)
fun(log + "2+", n - 2);
if (n >= 5)
fun(log + "5+", n - 5);
i++;
}
}
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