1.7

<img src="http://img.blog.csdn.net/20150407194531120?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQveHVlaG9uZ2hhbw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /><pre class="cpp" name="code">#include<iostream>using namespace std;int max(int x,int y,int z){if(x>y) y=x;if(y>z) z=y;return z;}int main(){int a=20,b=2,c=565;max(a,b,c);    cout<<max(a,b,c); }