代码示例_标准IO_fread / fwrite

fread_fwrite

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 fread_fwrite.c

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

typedef struct info{
    int age;
    int tail;
    char name[20];
}info;


int main(void)
{
    info panda = {20,180,"panda_w"};

    // 打开/创建
    FILE *fp = fopen("./1.text","w+");
    if(fp==NULL){
        perror("fopen failed");
        exit(1);
    }

    // 写
    if(  fwrite(&panda,sizeof(info),1,fp)==1  )
        printf("write OK!\n");

    // 关闭
    fclose(fp);


    // 打开/创建
    fp = fopen("./1.text","r");
    if(fp==NULL){
        perror("fopen failed");
        exit(1);
    }

    //读
    info pa ;

    if(  fread(&pa,sizeof(pa),1,fp)==1  )
        printf("read success!\n");

    printf("age:%d\ntail:%d\nname:%s\n",pa.age,pa.tail,pa.name);


    return 0 ;
}

 

 

测试：

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success ！