文件操作有关问题

文件操作问题
我定义一个结构体

C/C++ code

struct Test{    char a[100];    char *b;};

在first.cpp中定义一个struct Test obj1；然后赋值，例如strcpy(obj1.a,"12345");obj1.b="123";
然后再将obj1写入到out.txt中。
在second.cpp中同样定义个struct Test obj2，读取out.txt文件，并将读取的结果输出，如何实现？
（1）如果要求将读取的结果同样放入到obj2中，该如何实现？

[解决办法]

C/C++ code

int readtest(){    Test test;    memset(test.buf,0,sizeof(test.buf));    FILE *fp=fopen("test.txt","rb");    if(!fp)        return -1;    fread(&test,1,sizeof(test),fp);    printf("%d",test.num);    return 0;}int writetest(){    Test test;    memset(test.buf,0,sizeof(test.buf));    test.num=1;    memcpy(test.buf,"KKKK",4);    FILE *fp;    fp=fopen("test.txt","wb");    if(!fp)        return -1;    fwrite(&test,1,sizeof(test),fp);    fclose(fp);    return 0;}
[解决办法]
C/C++ code
    FILE *stream;    stream = fopen("fscanf.out", "r");    if(stream == NULL)        printf( "The file fscanf.out was not opened\n" );    else    {        while(feof(stream))        {            char s[100] = {0};            fscanf(stream, "%s", s);            memcpy(obj2.a,s);            memset(s, 0, sizeof(s));            fscanf(stream, "%s", s);            memcpy(obj2.b,s);        }    }
[解决办法]
C/C++ code
#include <stdio.h>#include <string.h>#include <stdlib.h>typedef struct Test{    char a[100];    char *b;}Test;int main(){    Test ds,ss;    strcpy(ds.a,"Hello World");    FILE *fp=fopen("temp.txt","w");    fwrite(&ds,1,sizeof(Test),fp);    fclose(fp);    fp=fopen("temp.txt","r");    fread(&ss,1,sizeof(Test),fp);    printf("%s\n",ss.a);    fclose(fp);    return 0;}//一个C的代码 

 

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