Socket operation on non-socket, Client server program in C - c

Question

I'm new to socket programming and I am trying to write a simple socket that connects to another socket on my PC (nc -l 35353)
I keep getting a error when trying to bind the socket and I don't know how to debug it.
UPDATE: The socket call is returning 0 as a file descriptor, although the man page does not say this is illegal, I thought unix/linux reserve fd 0, 1 and 2 for stdin, stdout and stderr by default. I am not sure if this has anything to do with the bind error I am seeing, I just felt this might be appropriate.
Here is the code
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<netinet/in.h>
#include<sys/types.h>
#include<sys/socket.h>
//typedef struct sockaddr_in sockaddr_in;
int main()
{
int sock_fd;
if( sock_fd = socket(AF_INET, SOCK_STREAM, 0) < 0)
{
perror("Socket Creation error!\n");
return 1;
}
struct sockaddr_in myaddr;
memset((char*)&myaddr, 0, sizeof(myaddr));
myaddr.sin_family = AF_INET;
uint32_t myip = (127<<24)|(0<<16)|(0<<8)|1;
myaddr.sin_addr.s_addr = htonl(myip);
myaddr.sin_port = htons(1337);
int binderror = bind(sock_fd, (struct sockaddr*)&myaddr, sizeof(myaddr));
printf("bind error %d\n",binderror);
if( binderror < 0)
{
perror("Bind Error!\n");
return 1;
}
struct sockaddr_in serveraddr;
memset((char*)&serveraddr, 0, sizeof(serveraddr));
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(35353);
//unsigned char serverip[] = {127,0,0,1};
uint32_t serverip = (127<<24)|(0<<16)|(0<<8)|1;
serveraddr.sin_addr.s_addr = htonl(serverip);
if( connect(sock_fd, (struct sockaddr*)&serveraddr, sizeof(serveraddr)) < 0 ){
perror("Could not connect\n");
return 0;
}
}

Answer 1

Your problem is here -
if( sock_fd = socket(AF_INET, SOCK_STREAM, 0) < 0)
It is old precedence,
if ( a = b == c ) is like saying if ( a = ( b == c )) It is calling the function, comparing it with -1 and assign the boolean result to sock_fd
What you suppose to do is -
if( (sock_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)