C :

#include <stdio.h>
typedef struct
{
	int no;
	int name[20];
	int year;
	int month;
	float math;
	float en;
	float c;
	float ave;
	
}STU;
int main(void)
{
	STU xs[100];
	int i,n;
	scanf("%d",&n);
	for (i=0;i<n;i++)
	{
		scanf("%d",&xs[i].no);
		scanf("%s",&xs[i].name);
		getchar();
		scanf("%d",&xs[i].year);
		scanf("%d",&xs[i].month);
		scanf("%f",&xs[i].math);
		scanf("%f",&xs[i].en);
		scanf("%f",&xs[i].c);
		xs[i].ave=(xs[i].math+xs[i].en+xs[i].c)/3;
	}
	for (i=0;i<n;i++)
	{
		printf("%d ",xs[i].no);
		printf("%s ",xs[i].name);
		printf("%d/",xs[i].year);
		printf("%d ",xs[i].month);
		printf("%g ",xs[i].math);
		printf("%g ",xs[i].en);
		printf("%g ",xs[i].c);
		printf("%.0f\n",xs[i].ave);
	}	
	return 0;
}

C++ :

#include<iostream>
#include<cstdio>
using namespace std;
struct stuent
{
	int num;
	char name[50];
	int year;
	int month;
	int math;
	int english;
	int cyy;
	double ave;
} a[100];
int main()
{
	int n;
	cin>>n;
	for (int i=1; i<=n; i++)
	{
		cin>>a[i].num>>a[i].name>>a[i].year>>a[i].month;
		cin>>a[i].math>>a[i].english>>a[i].cyy;
		a[i].ave=(a[i].math+a[i].english+a[i].cyy)/3.0;
	}
	for (int i=1; i<=n; i++)
	{
		printf("%d %s %d",a[i].num,a[i].name,a[i].year);
		printf("/%d %d %d",a[i].month,a[i].math,a[i].english);
		printf(" %d %.0lf\n",a[i].cyy,a[i].ave);
	}
}