编写函数功能是将三个数按照从小到大顺序输出
function fnSort(a,b,c){
//假设a<b<c
//如果假设不成立,则有三种情况 a>b a>c b>c 然后进行交换即可
var t =0
if(a>b){
t = a;
a = b;
b = t
}
if(a > c){
t = a;
a = c;
c = t;
}
if(b > c){
t = b;
b = c;
c = t;
}
document.write( "这三个数按照从小到大的顺序输出是:"+ a + "<" + b + "<" + c +"<br>");
}
fnSort(2,9,4);
fnSort(4,2,9);
fnSort(9,4,2);