地址交换问题
////////////////////////////////////////
//下面一个程序，运行时有错误， //
//我却不是很明白是怎么回事，请各位帮忙看看……//
//（不知道是不是交换地址的时候错了） //
////////////////////////////////////////



#include<iostream.h>
//完成一项录入按回车键切入下一项
//分数以空格间开


class student
{
public:
int number;
char name[30],sex[10];
int Englishgrade,Mathgrade,Physicsgrade;
}stu1[10];
void main()
{
int a,b,c,i;
student *t,*x,*y;
cout<<"please set 5 student' data.\n";
for(i=1;i<=5;i++)
{
cout<<"\n set the number of:"<<i<<"\n";
cin>>stu1[i].number;
cout<<"\n set the name of:"<<i<<"\n";
cin>>stu1[i].name;
cout<<"\n set the sex :"<<i<<"\n";
cin>>stu1[i].sex;
cout<<"\n set the grade of English,Math,Physics of :"<<i<<"\n";
cin>>stu1[i].Englishgrade>>stu1[i].Mathgrade>>stu1[i].Physicsgrade;
}
for(a=1;a<=5-1;a++)
for(b=1;b<=5-a;b++)
if(stu1[b].number>stu1[b+1].number)
{x=&stu1[b];
y=&stu1[b+1];
t=x;
x=y;
y=t;
&stu1[b]=x;
&stu1[b+1]=y;
}
for(c=1;c<=5;c++)
cout<<"\n"<<stu1[c].number<<"\t"<<stu1[c].name
<<"\t"<<stu1[c].sex<<"\t"<<stu1[c].Englishgrade<<"\t"
<<stu1[c].Mathgrade<<"\t"<<stu1[c].Physicsgrade<<"\n";
}

[解决办法]
运行时出的错？？编译通过了？

C/C++ code

#include <iostream.h> #include <memory.h>//完成一项录入按回车键切入下一项 //分数以空格间开 class student { public:     int number;     char name[30],sex[10];     int Englishgrade,Mathgrade,Physicsgrade; }stu1[10]; void main() {     int a,b,c,i;     student t;  //这里改了     cout <<"please set 5 student' data.\n";     for(i=1;i <=5;i++)     {         cout <<"\n set the number of:" <<i <<"\n";         cin>>stu1[i].number;         cout <<"\n set the name of:" <<i <<"\n";         cin>>stu1[i].name;         cout <<"\n set the sex :" <<i <<"\n";         cin>>stu1[i].sex;         cout <<"\n set the grade of English,Math,Physics of :" <<i <<"\n";         cin>>stu1[i].Englishgrade>>stu1[i].Mathgrade>>stu1[i].Physicsgrade;     }     for(a=1;a <=5-1;a++)         for(b=1;b <=5-a;b++)             if(stu1[b].number>stu1[b+1].number)             {                /*                x=&stu1[b];                 y=&stu1[b+1];                 t=x;                 x=y;                 y=t;                 &stu1[b]=x;    //《-----什么NB编译器啊？这也能编译通过?！                &stu1[b+1]=y;  //交换的是里面的数据，不是地址                */                memcpy(&t, stu1+b, sizeof(student));                memcpy(stu1+b, stu1+b+1, sizeof(student));                memcpy(stu1+b+1, &t, sizeof(student));            }             for(c=1;c <=5;c++)                 cout <<"\n" <<stu1[c].number <<"\t" <<stu1[c].name                 <<"\t" <<stu1[c].sex <<"\t" <<stu1[c].Englishgrade <<"\t"                 <<stu1[c].Mathgrade <<"\t" <<stu1[c].Physicsgrade <<"\n"; }