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Scanner input = new Scanner(System.in);
System.out.println("请输入3个数:");
int a = input.nextInt();
int b = input.nextInt();
int c = input.nextInt();
// 互换值后为b>a;不成立不互换
if (a > b) {
a = a + b;
b = a - b;
a = a - b;
}
// 互换值后为c>a;不成立不互换
if (a > c) {
a = a + c;
c = a - c;
a = a - c;
}
// 互换值后为c>b;不成立不互换
if (b > c) {
b = b + c;
c = b - c;
b = b - c;
}
// 所以是c>b>a
System.out.println("从小到大输出为" + a + "<" + b + "<" + c);