怎么才能把60分以上(含60分)的同学信息全部写入 D:\my data.txt文件中

Question

从键盘录入10个学生的学号、姓名、数学成绩，将其中60分以上(含60分)的同学信息全部写入 D:\my data.txt文件中;再从文件中读出成绩，显示到屏幕上。

Answer 1

#include <stdio.h>
typedef struct student
{
    char id[10];
    char name[10];
    int math;
} STU;
const int N = 10;
int main(int argc, char *argv[])
{
    STU stu[N];
    for (int i = 0; i < N; i++)
    {
        scanf("%s%s%d", stu[i].id, stu[i].name, &stu[i].math);
    }
    FILE *fp = fopen("D:\\my data.txt", "w");
    if (fp == NULL)
    {
        printf("打开文件错误！\n");
        return 1;
    }
    int count = 0;
    for (int i = 0; i < N; i++)
    {
        if (stu[i].math >= 60)
        {
            fprintf(fp, "%s %s %d\n", stu[i].id, stu[i].name, stu[i].math);
            count++;
        }
    }
    fclose(fp);
    STU stuRead[N];
    fp = fopen("D:\\my data.txt", "r");
    if (fp == NULL)
    {
        printf("打开文件错误！\n");
        return 1;
    }
    for (int i = 0; i < count; i++)
    {
        fscanf(fp, "%s%s%d", stuRead[i].id, stuRead[i].name, &stuRead[i].math);
        printf("%s %s %d\n", stuRead[i].id, stuRead[i].name, stuRead[i].math);
    }
    fclose(fp);
    getchar();
    return 0;
}