Question

VC如何用引用交换两数字?

#include <iostream.h>
class jiaohuan

{public:
ab(int &a,&b);
};

jiaohuan::ab(int &a,int &b)
{int c;
a=c;
a=b;
b=c;

cout<<a<<endl<<b;
}
void main()
{jiaohuan huan;
huan.ab (3,5);
} 为什么我的不行 ?要怎么做?

Answer 1

#include <iostream.h>
void ab(int &a,int &b)
{
cout << "正在交换...\n";
int c = a;
a = b;
b = c;
}
void main()
{
int m = 3, n = 5;
cout << "交换前:" << m << ends << n << endl;
ab(m, n);
cout << "交换后:" << m << ends << n << endl;
}

Answer 2

c=a 写成 a=c了