need help

[david55384]

hello i need help with that program
it have to write the funtion of sin
please help me


/*
** Izena/Nombre :
**
**---------------------------------------------------------------------------------
**
** ENUNTZIATUA
** Programa hau konpilatzean errore eta ohar mezu batzuk agertzen dira.
** Eta gainera, GAIZKI funtzionatzen du exekutatzen denean.
** Aldatu programa hau warning guztiak kentzeko eta ondo funtzionatu dezan.
*/

#include <math.h> // ANSI function prototypes
#include <stdio.h> // Prototype of 'printf' function
#include <stdlib.h> // Prototype of 'system' & 'exit' functions

/************************************************
* 1.- SYMBOL DEFINITIONS *
************************************************/

#define PIx2 6,283 // 2 . PI
#define DELTA 0,300 // Increment step

/************************************************
* 2.- NEW DATA TYPES *
************************************************/

typedef enum {
ERROR = -1,
OK
} Ret_cod_t;

/************************************************
* 3.- FUNCTION PROTOTYPES *
************************************************/

int main (void);
void Print_Stars (int nos);

/***************** main *********
* Shows a sinusoid wave in the screen. *
************************************************/

int main (void)
{
double number_of_stars, angle = 0;

while (angle = PIx2);
{
number_of_stars = 40 + 30 * sin (angle);
Print_Stars ((int) number_of_stars); // print line with stars
angle += DELTA;
}
printf ("\n\n"); // and repeat
system ("Pause"); // Wait for a keystroke
return (OK);
}


/************ Print_Stars *********
* *
* Prints a line of 'nos' asterisks. *
* *
* Input: int nos (number of stars-asterisks *
* Output: nothing *
* *
************************************************/

void Print_Stars (int nos)
{
int i = 0;

while (i < nos)
{
printf ("*");
i++;
}
printf ("\n");
}

[Werner2]

Basically, your code needs to generate a vertical sine wave in ascii art?

Please use code tags to make your code more readable.

I do see some mistakes already:

while (angle = PIx2);
{
// etc... 

Do not write a semicolon after the while line, or it'll disconnect the while statement from the block of code that makes up your loop.

(angle = PIx2), note that you're using only one =, so this is an assignment, not a comparison. Use == instead. Also, are you shure you didn't mean a less-than or greater-than comparison? (<, <=, >, >=)

If you correct those, does it work?

Also, your constants use a "," as the decimal seperator. Use a "." instead.

Your program then becomes:

#include <math.h> // ANSI function prototypes
#include <stdio.h> // Prototype of 'printf' function
#include <stdlib.h> // Prototype of 'system' & 'exit' functions

/************************************************
* 1.- SYMBOL DEFINITIONS *
************************************************/

#define PIx2 6.283 // 2 . PI
#define DELTA 0.300 // Increment step

/************************************************
* 2.- NEW DATA TYPES *
************************************************/

typedef enum {
ERROR = -1,
OK
} Ret_cod_t;

/************************************************
* 3.- FUNCTION PROTOTYPES *
************************************************/

int main (void);
void Print_Stars (int nos);

/***************** main *********
* Shows a sinusoid wave in the screen. *
************************************************/

int main (void)
{
double number_of_stars, angle = 0;

while (angle < PIx2)
{
number_of_stars = 40.f + 30.f * sin (angle);

Print_Stars ((int) number_of_stars); // print line with stars
angle += DELTA;
}

return 0;
}


/************ Print_Stars *********
* *
* Prints a line of 'nos' asterisks. *
* *
* Input: int nos (number of stars-asterisks *
* Output: nothing *
* *
************************************************/

void Print_Stars (int nos)
{
int i = 0;

while (i < nos)
{
printf ("*");
i++;
}
printf ("\n");
}

[david55384]

it works better but it do that
************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************************
************************************************************************************************************************************************************************************
it have to do like that
*
**
***
*****
*******
*****
**
**
***
****
******
********
please i need it in a hour
thanks for your help

[david55384]

it have to do that

http://mudle.mondragon.edu/mgep/file.php/8703/6-Kontrol-puntuak/2013/Emaitza.png

[david55384]

many thanks, you saved me from failing an exam

[Werner2]

You welcome.

The reason it didn't work was because you wrote your constants as "0,300";

I don't know why that compiled (could someone tell me?), but basically it threw away the decimal part, and added 0 to the angle.

Also, the link you posted requires a password to visit.