No such file or directory open syscall error

Question

I created a folder "progfiles" on the desktop and then created an empty document named "newfile.txt" in it. After that I wrote a program to open and read write newfile.txt but on running error occured on checking errno it gave error "no such file or directory", my part of the program is:

  fdr = open("Desktop/progfiles/newfile.txt",O_RDONLY,0666);

  if(fdr == -1)
  {
      printf("Error:Failed to open\n");
      perror("open:");
  }

Why is it? What is the mistake I've made.

Answer 1

您需要包括完整的文件路径或open()的相对路径

int fdr=open("/home/<User>/Desktop/progfiles/newfile.txt",O_RDONLY,0666);

Answer 2

如前所述，您要么需要包含完整的文件路径，要么要确保可执行文件位于文件所在位置的正确文件夹中，例如您给open()的路径是"Desktop/progfiles/newfile.txt" ，以确保可执行文件位于Desktop的父文件夹中。