取模

关于负数取模，参照

Java中的取模运算

http://www.cnblogs.com/jasonkoo/articles/2213763.html

负数取模、负数除法的问题

http://blog.newnius.com/mod-or-division-of-negative.html

小数取模，变成整数后计算即可。

public void test() {

byte b = 34;

byte a = 3;

int c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 34;

a = -3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = -34;

a = 3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = -34;

a = -3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

}

public void test2() {

double b = 3.4;

double a = 0.3;

double c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 3.4;

a = -0.3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = -3.4;

a = 0.3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = -3.4;

a = -0.3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 3.4;

a = 0.3;

c = b / a;

System.out.println(b + "/" + a + "=" + c);

}

public void test3() {

float b = 3.4f;

float a = 0.3f;

float c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 3.4f;

a = -0.3f;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = -3.4f;

a = 0.3f;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = -3.4f;

a = -0.3f;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 3.4f;

a = 0.3f;

c = b / a;

System.out.println(b + "/" + a + "=" + c);

}

public void test4() {

double b = 3.24;

double a = 3;

double c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 6;

a = 3.5;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 3.24;

a = 0.3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 3.24;

a = 0.03;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 32.4;

a = 3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 324;

a = 3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

}

public void test5() {

long b = 324;

long a = 300;

long c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 60;

a = 35;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 34;

a = 3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 324;

a = 30;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

b = 324;

a = 3;

c = b % a;

System.out.println(b + "%" + a + "=" + c);

}

34%3=1

34%-3=1

-34%3=-1

-34%-3=-1

3.4%0.3=0.10000000000000003

3.4%-0.3=0.10000000000000003

-3.4%0.3=-0.10000000000000003

-3.4%-0.3=-0.10000000000000003

3.4/0.3=11.333333333333334

3.4%0.3=0.099999964

3.4%-0.3=0.099999964

-3.4%0.3=-0.099999964

-3.4%-0.3=-0.099999964

3.4/0.3=11.333333

3.24%3.0=0.2400000000000002

6.0%3.5=2.5

3.24%0.3=0.24000000000000032

3.24%0.03=3.3306690738754696E-16

32.4%3.0=2.3999999999999986

324.0%3.0=0.0

324%300=24

60%35=25

34%3=1

324%30=24

324%3=0