/*有3个学生,每个学生有3门课的成绩,从键盘输入学生的信息(包括学号,姓名,三门课成绩),
计算出平均成绩,将原有数据和计算出的平均分数存放在磁盘文件(二进制文件)中;再读盘并以表格形式在显示器上输出。*/
//能显示出来姓名,然后学号后面显示一堆0...
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct student
{
char name[10];
int number;
float score[4];
}a[3],b[3];
int main()
{
int i = 0 , j;
FILE* fp;
printf("姓名:\t\t学号:\t\t语文:\t\t数学:\t\t英语:\n");
for (i = 0; i < 3; i++)
{
scanf("%s%d", a[i].name, &a[i].number);
for(j = 0 ;j < 3; j++ )
{
scanf("%d",&a[i].score[j]);
a[i].score[3] =a[i].score[j];
}
a[i].score[3] = a[i].score[3] / 3;
}
if ((fp = fopen("d:\\d.dat", "wb")) == NULL)
{
printf("打开文件失败\n");
exit(1);
}
fwrite(a, sizeof(struct student), 3, fp);
fclose(fp);
if ((fp = fopen("d:\\d.dat", "rb")) == NULL)
{
printf("打开文件失败\n");
exit(1);
}
fread(b,sizeof(struct student),1,fp);
for(i=0;i<3;i++)
{
printf("%10s%10d",a[i].name,a[i].number);
for(j=0;j<3;j++)
printf("%5f",a[i].score[j]);
printf("\n");
}
fclose(fp);
return 0;
}