条件跳转或移动取决于使用fread()后的未初始化值

size_t fread(void *ptr, size_t size, size_t count, FILE *stream);

#include <stdio.h>
#include <stdlib.h>

typedef struct {
    int id;
    char name[50];
} Record;

int main() {
    FILE *file = fopen("data.bin", "rb");
    if (!file) {
        perror("Failed to open file");
        return 1;
    }

    Record records[10];
    size_t read_count = fread(records, sizeof(Record), 10, file);

    if (read_count != 10) {
        if (feof(file)) {
            printf("Reached end of file after reading %zu records.\n", read_count);
        } else if (ferror(file)) {
            perror("Error reading file");
        }
        fclose(file);
        return 1;
    }

    for (size_t i = 0; i < read_count; ++i) {
        printf("Record %d: ID = %d, Name = %s\n", i + 1, records[i].id, records[i].name);
    }

    fclose(file);
    return 0;
}