有3个学生，各修四门课，求总平均分及第n个学生的总分

#include<stdio.h>

int main()

{
float average(float *p,int n);

    float search(float (*b)[4],int n);
int n;
printf("enter ish student:\n");

    scanf("%d",&n);
float score[3][4]={65,67,70,60,80,87,90,81,90,99,100,98};
printf("%5.2f\n",average(*score,12));
printf("%5.2f\n",search(score,n));
return 0;

}

float average(float *p,int n)

{
float *a,aver,sum=0;
for(a=p;a<p+12;a++)
sum=sum+*a;
aver=sum/n;
return(aver);

}

float search(float (*b)[4],int n)

{
float sum=0;
int j;
for(j=0;j<4;j++)
sum=sum+*(*(b+n)+j);
return(sum);

}