打开一个文件用于读或写

[c]代码库

#include <string.h> 
#include <stdio.h> 
#include <fcntl.h> 
#include <io.h> 

int main(void) 
{ 
   int handle; 
   char msg[] = "Hello world"; 

   if ((handle = open("TEST.$$$", O_CREAT | O_TEXT)) == -1) 
   { 
      perror("Error:"); 
      return 1; 
   } 
   write(handle, msg, strlen(msg)); 
   close(handle); 
   return 0; 
}