jiecheng.java

来自「java应用举例1」· Java 代码 · 共 10 行

public class JieCheng {
    public static int factorial(int x) {
	if (x < 0) throw new IllegalArgumentException("x must be >= 0");
        int fact = 1;
        for(int i = 2; i <= x; i++)    
            fact *= i;                 
        return fact;
    }
}