如何实现结构体和文件之间实现读写--fopen文件流读写(fscanf/fprintf)

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目的：

#1. 把结构体数据写入文件；

#2. 把文件中数据到处到结构体；

用到的函数：

FILE *fopen(const char *path, const char *mode);int fscanf(FILE *stream, const char *format, ...);

int fprintf(FILE *stream, const char *format, ...);

以下是测试函数：

<pre name="code" class="cpp">#include <stdio.h>#include <string.h>FILE *stream;typedef struct test{int a;int b;int c;int d;int e;int f;int g;}STest;FILE *openHistoryFile(const char *path, const char *mode){return fopen(path, mode);}int writeHistoryFile(FILE *stream, STest test){return fprintf(stream,"%d %d %d %d %d %d %d\n", test.a,test.b,test.c,test.d,test.e,test.f,test.g);}int readHistoryFile(FILE *stream, STest *test){return fscanf(stream, "%d %d %d %d %d %d %d", &test->a,&test->b,&test->c,&test->d,&test->e,&test->f,&test->g);}int main(void){STest test = {120, 82, 50, 60, 95, 100, 2};STest readTest = {0};    stream = openHistoryFile("test.txt", "ab+");//memset(&test, 0 , sizeof(STest));    if(stream==NULL){    printf("The file test.txt opened\n");}    else    {writeHistoryFile(stream, test);        fseek(stream,0L,SEEK_SET);memset(&readTest, 0 , sizeof(STest));while(readHistoryFile(stream, &readTest) != EOF){   /*print the data value*/    printf("%d %d %d %d %d %d %d\n",readTest.a,readTest.b,readTest.c,readTest.d,readTest.e,readTest.f,readTest.g);}        fclose(stream);    }    return 0;}

以下是测试结果：

duser@10.1.1.5:~/Desktop/testFunction/open$ gcc fopenRW.cduser@10.1.1.5:~/Desktop/testFunction/open$ ./a.out 120 82 50 60 95 100 2

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