linux下标准I/O操作

/*** writerec.c****/
#include <stdio.h>
#include <stdlib.h>
struct record {char name[10];
int age;};
int main(void)
{
int result;
struct record array[2] = {{"Ken", 24}, {"Knuth", 28}};
FILE *fp = fopen("recfile", "w");
if (fp == NULL) {
perror("Open file recfile");
exit(1);
}
result=fwrite(array, sizeof(struct record), 2, fp);
/*fwrite函数，第一个参数是数据存储的数组，第二个是每条记录的大小，第三个是记录数，第四个是文件指针，返回写入的记录数。*/
printf("write %d records\n",result);
if(result<2){
printf("file write eror\n");
}
fclose(fp);
return 0;
}

/***** readrec.c*****/
#include <stdio.h>
#include <stdlib.h>
struct record {
char name[10];
int age;
};
int main(void)
{
struct record array[2];
FILE *fp = fopen("recfile", "r");
if (fp == NULL) {
perror("Open file recfile");
exit(1);
}
fread(array, sizeof(struct record), 2, fp);
printf("Name1: %s\tAge1: %d\n", array[0].name, array[0].age);
printf("Name2: %s\tAge2: %d\n", array[1].name, array[1].age);
fclose(fp);
return 0;
}