关于申请动态内存来管理学生成绩

#include<iostream.h>

struct Student
{
char name[ 20 ];
float score;
};

int main()
{
Student *student;
int studentNum;

cout << "Please input student number:";
cin >> studentNum;

//申请内存空间
students = new Student[ studentNum ];

if( students == NULL )
{
cout << "Insufficient memory! \n";
return ;
}

// 读入学生信息
cout << "Please input student name and score:\n";
for( int i = 0; i < studentNum; i++ )
{
cout << i + 1 << " : ";
cin >> students[ i ].name >> students[ i ].score;
}

//计算平均成绩
float sum = 0;
for ( i = 0; i < studentNum; i++ )
sum += students[ i ].score;

cout <<"\nThe average score is " << sum/studentNum << endl;