C语言“fread”函数的用法？

C语言“fread”函数的用法为“size_tf read(void *buffer,size_t size,size_t count,FILE *stream)”，其作用是从一个文件流中读数据，读取count个元素，每个元素size字节。

示例1#include

#include

#include

int main()

{

FILE *stream;

char msg[]="this is a test";

char buf[20];

if ((stream=fopen("dummy.fil","w+"))==NULL)

{

fprintf(stderr,"cannot open output file.\n");

return 1;

}

/*write some data to the file*/

fwrite(msg,1,strlen(msg)+1,stream);

/*seek to the beginning of the file*/

fseek(stream,0,SEEK_SET);

/*read the data and display it*/

fread(buf,1,strle