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public class Hello{
    public static void main(String[] args){
        int i  = 5 ,  j = 2;
        System.out.println(i+j);
        System.out.println(i-j);
        System.out.println(i*j);
        System.out.println(i/j);
    }
}
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System.out.println(i%j);
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°Ñ int i = 5 ,  j=2;  ¸Äд³Édouble i =5 , j = 2;
ÔÙ±àÒëÔËÐÐÒ»´Î£¬»áµÃµ½ÈçϵĽá¹û: 7.0 , 3.0 , 10.0 , 2.5.
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int i = 5,j = 2;
Scanner s = new Scanner(System.in);
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