范例:
//判断数字的奇偶性
System.out.println("请输入一个数");
Scanner sc = new Scanner(System.in);
int num = sc.nextInt();
if (num%2==0){
System.out.println(num + "是偶数");
}else {
System.out.println(num + "是奇数");
}
//判断俩个数的大小
System.out.println("请输入俩个数字");
Scanner num1 = new Scanner(System.in);
Scanner num2 = new Scanner(System.in);
int a = num1.nextInt();
int b = num2.nextInt();
if (a - b == 0){
System.out.println("a=b");
}else if(a - b > 0){
System.out.println("a>b");
}else {
System.out.println("a<b");
}
// 判断三个数的大小
int a , b ,c, max;
System.out.println("请输入三个整数");
Scanner sc = new Scanner(System.in);
a = sc.nextInt();
b = sc.nextInt();
c = sc.nextInt();
max = a;
if (b > max) max = b;
if (c > max) max = c;
System.out.println("max =" + max );
int a , b , c ,r;
System.out.println("请输入三个整数");
Scanner sc = new Scanner(System.in);
a = sc.nextInt();
b = sc.nextInt();
c = sc.nextInt();
// 对三个数由小到大排序,不改变三个数的内容
int a, b, c;
System.out.println("请输入三个整数");
Scanner sc = new Scanner(System.in);
a = sc.nextInt();
b = sc.nextInt();
c = sc.nextInt();
if (a > b) {
if (b > c) {
System.out.println("a>b>c");
} else {
System.out.println("a>c>b");
}
} else {
if (c < a) {
System.out.println("b>a>c");
} else {
if (c > b) {
System.out.println("c>b>a");
} else {
System.out.println("b>c>a");
}
}
}
//选出ab中较小的数
if (a>b) {
r = a;
a = b;
b = r;
}
//选出ac中较小的数
if (a>c) {
r = a;
a = c;
c = r;
}
//选出bc中较小的数
if (b>c) {
r = b;
b = c;
c = r;
}
System.out.println(a+"<"+b+"<"+c);