#include <stdio.h>
#define N 2

int main()
{
    int i;
    FILE *fp;
    FILE *fpp;
    struct stu
    {
        char name[10];
        int number;
        int score;
    }stud[N];
    fp = fopen("stu.txt", "w");
    for(i = 0; i < N; i++)
    {
        printf("input imformation:\n");
        printf("name:");
        scanf("%s", &stud[i].name);
        printf("number:");
        scanf("%d", &stud[i].number);
        printf("score:");
        scanf("%d", &stud[i].score);
        fprintf(fp, "%s, %d, %d\n", stud[i].name, stud[i].number, stud[i].score);
    }
    fclose(fp);
    fpp = fopen("stu.txt", "r");
    for(i = 0; i < N; i++)
    {
        if(stud[i].score > 550.0)
            printf("%sNO:%d is excellent student\n", stud[i].name, stud[i].number);
    }
    fclose(fpp);
    getch();
    return 0;
}
你慢慢研究吧！

#include <stdio.h>
#define N 2

int main()
{
    int i;
    FILE *fp;
    FILE *fpp;
    struct stu
    {
        char name[10];
        int number;
        int score;
    }stud[N];
    fp = fopen("stu.txt", "w");
    for(i = 0; i < N; i++)
    {
        printf("input imformation:\n");
        printf("name:");
        scanf("%s", &stud[i].name);
        printf("number:");
        scanf("%d", &stud[i].number);
        printf("score:");
        scanf("%d", &stud[i].score);
        fprintf(fp, "%s, %d, %d\n", stud[i].name, stud[i].number, stud[i].score);
    }
    fclose(fp);
    fpp = fopen("stu.txt", "r");
    for(i = 0; i < N; i++)
    {
        if(stud[i].score > 550.0)
            printf("%sNO:%d is excellent student\n", stud[i].name, stud[i].number);
    }
    fclose(fpp);
    getch();
    return 0;
}

多谢！！！！！！！！

呵呵，

学习

买国外的吧