I am encountering an “identifier not found” error for open, even though I have included the required headers (<fcntl.h>). My code involves file operations using open() and related functions. Why is this error occurring?
<code>#include <fcntl.h>
#include <unistd.h>
#include <iostream>
int main() {
// Relevant code using open() function
int fd = open("file.txt", O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
// Further operations involving file descriptors
close(fd); // Closing the file descriptor
return 0;
}
</code>
<code>#include <fcntl.h>
#include <unistd.h>
#include <iostream>
int main() {
// Relevant code using open() function
int fd = open("file.txt", O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
// Further operations involving file descriptors
close(fd); // Closing the file descriptor
return 0;
}
</code>
#include <fcntl.h>
#include <unistd.h>
#include <iostream>
int main() {
// Relevant code using open() function
int fd = open("file.txt", O_RDONLY);
if (fd == -1) {
perror("open");
return 1;
}
// Further operations involving file descriptors
close(fd); // Closing the file descriptor
return 0;
}
I’m encountering an “identifier not found” error for open() in my C++ program, even though I’ve included <fcntl.h> as the header file. From my understanding, open() is a standard function for file operations in UNIX-like systems, but it seems the compiler can’t locate it. Could you help clarify why this error might be occurring and how to resolve it?
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