c语言文件io linux下

#include <stdio.h>

int main() {
    FILE *file;
    char str[100];

    // 写入文件
    file = fopen("example.txt", "w");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }
    fprintf(file, "Hello, World!\n");
    fclose(file);

    // 读取文件
    file = fopen("example.txt", "r");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }
    fgets(str, sizeof(str), file);
    printf("%s", str);
    fclose(file);

    return 0;
}

#include <stdio.h>

typedef struct {
    int id;
    char name[20];
} Person;

int main() {
    Person p = {1, "Alice"};
    FILE *file;

    // 写入二进制文件
    file = fopen("person.bin", "wb");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }
    fwrite(&p, sizeof(Person), 1, file);
    fclose(file);

    // 读取二进制文件
    file = fopen("person.bin", "rb");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }
    Person read_p;
    fread(&read_p, sizeof(Person), 1, file);
    printf("ID: %d, Name: %s\n", read_p.id, read_p.name);
    fclose(file);

    return 0;
}