C语言趣味程序百例精解之JAVA实现

C语言趣味程序百例精解之JAVA实现：
76.小明买书 



public class Test76{
public static void main(String args[]){
    buyBooks76();
}    
    /**  
     * 76.小明买书 
     *   
     */  
    public static  void buyBooks76() {   
        double a = 3.1;   
        double b = 1.7;   
        double c = 2;   
        double d = 5.3;   
        double e = 0.9;   
        double f = 7.2;   
        double cha = 0.1;   
        double s = 0;   
        double min=0;
  
        for (int a1 = 0; a1 <= 1; a1++)   
            for (int b1 = 0; b1 <= 1; b1++)   
                for (int c1 = 0; c1 <= 1; c1++)   
                    for (int d1 = 0; d1 <= 1; d1++)   
                        for (int e1 = 0; e1 <= 1; e1++)   
                            for (int f1 = 0; f1 <= 1; f1++) {   
                                s = a1 * a + b1 * b + c1 * c + d1 * d + e1 * e   
                                        + f1 * f;   
                                if (s != 0 && Math.abs(s - 10) <= cha) {//相差一角钱
                                    cha = Math.abs(s - 10);   
                                    System.out.print("差值：" + cha);   
                                    if(a1!=0) System.out.print(" a=" + a);   
                                    if(b1!=0) System.out.print(" b=" + b);   
                                    if(c1!=0) System.out.print(" c=" + c);   
                                    if(d1!=0) System.out.print(" d=" + d);   
                                    if(e1!=0) System.out.print(" e=" + e);   
                                    if(f1!=0) System.out.print(" f=" + f);   
                                    System.out.println();   
                                }   
                            }   
    }   
}
运行：
C:\bat>java Test76
差值：0.09999999999999964 c=2.0 e=0.9 f=7.2
差值：0.09999999999999964 b=1.7 c=2.0 d=5.3 e=0.9
差值：0.09999999999999964 a=3.1 b=1.7 d=5.3