Thread: Expression preceding parethenses?

Originally Posted by nothing909

do i need to write a delay function for the delay to work?
if so, how do i go about writing it? can you give me an example

Why not just use the standard sleep() function if your compiler has it. It would do the same thing.

Originally Posted by userxbw

that is just a blank loop that just loops for an x amount of time to make a delay occur, give it a try, the larger the number the longer the delay. the need to make his or her code into a function is up to the programmer.

Code:

void AI(void){
    unsigned int delay = 1000;


  if (yR2 > yBall)
  {
   if (yR2 > RACKET ) 
   {
       delay(1000);
    yR2--; 
   }

  }

i'm honestly so confused why this code isn't working and i'm receiving this error. what is the problem with it, i've been trying to work it out for hours.

Originally Posted by rstanley

Why not just use the standard sleep() function if your compiler has it. It would do the same thing.

could you please explain, relating it to my code, how i can use a sleep function. i don't know if this is correct, but if i do:

Code:

void AI(void){
    unsigned int sleep = 1000;
 
 
  if (yR2 > yBall)
  {
   if (yR2 > RACKET ) 
   {
       sleep(1000);
    yR2--; 
   }
 
  }

Code:

that still gives me the exact same error.

Originally Posted by userxbw

Code:

#include <unistd.h>
       
int main(int argc, const char **argv)
{
    if ( argc < 2)
    {
        printf("no input\n"
        "Input a number to se if odd or even\n");
        return -1;
    }
    
    sleep(10);
     printf("I just slept for 10 seconds\n");
return 0;
}

i don't think my compiler has the sleep function, it doesn't work.

could you please look at my first post, with the code i gave and explain the reason why it wouldn't work because i still don't know.

the code i provided is for a pong game, its just delaying the racket movement

Originally Posted by nothing909

the code i provided is for a pong game, its just delaying the racket movement

secret code, I get it. Ok. do you know what the difference between global and local and protected when it comes to data types and their access to them?
because if your, yR2, yBall, yR2, RACKET are not global then how will that function see them to determine what they are, and I nor others do not really even know what errors your compiler/program is throwing even. I have not seen that information. if they are not global then you're going to need to pass them into your function.

they're all global variables, that isn't the problem

Originally Posted by nothing909

could you please explain, relating it to my code, how i can use a sleep function. i don't know if this is correct, but if i do:

Code:

void AI(void){
    unsigned int sleep = 1000;
 
 
  if (yR2 > yBall)
  {
   if (yR2 > RACKET ) 
   {
       sleep(1000);
    yR2--; 
   }
 
  }

Code:

that still gives me the exact same error.

Providing you add the following at the top of your .c file or in a header file called by your .c file, it should work. Please read the man page for sleep(). The argument to sleep() is the number of seconds, so 1000 is over 16 minutes! ;^)

Code:

#include <unistd.h>

Originally Posted by userxbw

[code]
-- besides this. what function is called delay, and why you making a variable called delay then using a function called delay then putting in the same amount of your variable called delay into that function by the same name?

if i remove the unsigned int delay = 1000;

and i just have delay(1000);

it now says on the delay(1000) line that delay is being declared implicitly. what does this mean

Originally Posted by rstanley

Providing you add the following at the top of your .c file or in a header file called by your .c file, it should work. Please read the man page for sleep(). The argument to sleep() is the number of seconds, so 1000 is over 16 minutes! ;^)

Code:

#include <unistd.h>

i can't add that "source file cannot be found.

Originally Posted by nothing909

i can't add that "source file cannot be found.

Which "source file" cannot be found??? I am totally confused!

i'm so confused, i've never used dos.h before. i thought creating a delay was an easy little thing.

in my code the way it, can you explain how i can create a simple delay without using delay or sleep, what is it i have to do