从文件写入和读取结构体示例代码

/****************************************************** author :杨志永* date    :2012-04-15* E-mail:[e-mail]* QQ     :929168233** filename:structs_io.c** Sytem:Debian 6.0.4* GCC:4.6.3* Architecture:X86_64*******************************************************/#include <stdio.h>#include <stdlib.h>#define MAX 80struct student{    char name[MAX];    int number;};int main(int argc, char * argv[]){    FILE * file;    int i;    struct student writeStruct[2], readStruct[2], *write_ptr, *read_ptr;    if ( (file=fopen("test.txt", "w+")) == NULL )    {        printf("open test.txt failed!\n");        exit(EXIT_FAILURE);    }    write_ptr = writeStruct;    read_ptr = readStruct;    for (i=0; i<2; i++, write_ptr++)        scanf("%s\t%d", write_ptr->name, &write_ptr->number);    write_ptr = writeStruct;    fwrite(write_ptr, sizeof(struct student), 2, file);    rewind(file);    fread(read_ptr, sizeof(struct student), 2, file);    printf("read from read_ptr\n");    for (i=0; i<2; i++)    {        printf("name is : %s\n", read_ptr->name);        printf("number is : %d\n", read_ptr->number);        read_ptr++;    }    exit(EXIT_SUCCESS);}