public class TestExer1{
public static void main(String[] args){
int m = 12;
int n = 5;
System.out.println("m:"+m+" n:"+n);
//方法一:通過一個臨時變量
int temp = m;
m = n;
n = temp;
System.out.println("m:"+m+" n:"+n);
//方法二:當m和n較大時,有可能出現精度損失
m = m + n;//m=12 + 5
n = m -n;//n = 17 - 5
m = m - n;//m = 17 - 12
System.out.println("m:"+m+" n:"+n);
//方法三: 優點:沒有上面兩種方法的缺點; 缺點:不易了解。
m = m ^ n;
n = m ^ n;//(m ^ n) ^ n = m
m = m ^ n;//(m ^ n) ^ m = n
System.out.println("m:"+m+" n:"+n);
}
}