Basic C programming: using kbhit to stop Loop

[Random49]

Hello,

I am still a beginner at C and I am writing a program where the velocity and angle are required from the user.

The way I wanted to do that is to have a loop (going from 0 to 300 for example for velocity) that would quickly print out the numbers (show the numbers going quickly from 1 to 2 to 3 etc.) and as soon as the user presses enter the loop stops and the value of the loop at that time should be stored.

I am not sure how to do it though, I would really appreciate an example on how to do that

THANKS!

[stdq]

Hi, Random49. I think it would be better if the user could type in the values of the velocity and the angle - you still could limit the values to be accepted. However, if you prefer to do the loop as you said, it would be better if the loop restarted, in case the user hadn't entered anything yet. Please tell me which way you'd prefer to do it, and I will give you some help with the code.

Regards!

[Random49]

Hello,

I already had it set up such that the user can type in the values like that:

/* get the projectile angle */
double get_projectile_angle(void)
{
	double angle;


	printf("\nEnter angle of projectile (0 to 360):  ");
    scanf("%lf",&angle);


	return angle;
}

It didn't limit the values and I guess I can try to do that but i would prefer it to be in a loop that restarts. THANKS!!!

[stdq]

Hi! I apologize, I'm not sure how to make the program print the values continuously while waiting to the input. However, extending you code above, you can limit the output like this:

/* get the projectile angle */
double get_projectile_angle(void)
{
    double angle;
 
 
    printf("\nEnter angle of projectile (0 to 360):  ");
    scanf("%lf",&angle);
    
    while ( ( angle < 0 )  && ( angle > 360 ) )
    {
          printf("\nEnter angle of projectile (0 to 360):  ");
          scanf("%lf",&angle);
    }
 
    return angle;
}

If you do it this way, I recommend you to test the program entering values really close to the limits. If the program do not behave correctly, check this:

I can't figure this out!

Regards!

[Random49]

Thanks