Question

C++编程:定义一个函数,比较两个数的大小,形参分别使用指针和引用

Answer 1

#include<iostream>
#include<stack>
using namespace std;
float compare(float *a,float &b) //a为指针,b为引用
{

if (*a>b) return *a;
else return b;

}
int main()
{
float x,y;
cin>>x>>y;
cout<<"The max="<<compare(&x,y)<<endl;
return 0;
}

Answer 2

#include<iostream>

using namespace std;

float compare(float *a,float *b)
{

if (*a>*b) return *a;
else return *b;

}

float compare(float &a,float &b)
{
return (a>b?a:b);
}

int main()
{
float x,y;
cout<<"请输入两个参数："<<endl;
cin>>x>>y;
cout<<"当形参为指针时："<<endl;
cout<<"The max="<<compare(&x,&y)<<endl;
cout<<"当形参为引用时："<<endl;
cout<<"The max="<<compare(x,y)<<endl;
return 0;
}

Answer 3

#include<iostream>
#include<stack>
dedecms.com

using namespace std;
float compare(float *a,float &b) //a为指针,b为引用
{
if (*a>b) return *a;
else return b;
}
int main()
{
float x,y;
cin>>x>>y;
cout<<"The max="<<compare(&x,y)<<endl;
return 0;
}