题目：输入三个整数x,y,z，请把这三个数由小到大输出。

1.程序分析：我们想办法把最小的数放到x上，先将x与y进行比较，如果x>y则将x与y的值进行交换，

　　　　　　然后再用x与z进行比较，如果x>z则将x与z的值进行交换，这样能使x最小。-Title: Enter three integers x, y, z, please put the three and a number of small to large output. 1. Program analysis: We want to approach the smallest number is placed on the x, compare the first x and y, if x>　y is the value of x and y to be exchanged, then the x and z comparison, if x >　z then the values ​ ​ of x and z are to be exchanged, this enables the x minimum.