有一个班，三个学生，各学四门课，计算总平均分数以及第n个学生的成绩

#include<stdio.h>
int main()
{
void average(float *p,int n);
void search(float (*p)[4],int n);
float score[3][4]={{65,67,70,60},{80,87,90,81},{90,99,100,98}};
average(*score,12);
search(score,2);
return 0;
}
void average(float *p,int n)
{
float*p_end;
float sum=0;
float aver;
p_end=p+n-1;
for(;p<=p_end;p++)
{
sum=sum+(*p);
}
aver=sum/n;
printf("average=%5.2f\n",aver);
}
void search(float(*p)[4],int n)
{
int i;
printf("the score of No.%dare:\n",n);
for(i=0;i<4;i++)
{
printf("%5.2f\n",*(*(p+n)+i));
}
printf("\n");
}