1)#include 2)# include 3)using namespace std;4)dou...
1)#include< iostream >
2)# include< math.h >
3)using namespace std;
4)double max(double x,doubley);
5)void main()
6){
7)double a,b,c;
8)cout<< " input two numbers:"; 9)cin>>a>>b;
10)c=max(a,b);
11)cout<< " the squart of max imum="<< sqrt(c); 12)} 13)double max(doublex,doubley) 14){ 15)if(x>y)
16)returnx;
17)else
18)returny;
19)}
程序第7行中定义了几个变量:()
A. 1个
B. 2个
C. 3个
D. 4个