[Tavisha]

HI all

Like I have mentioned before I am trying to work on Image processin code..
I wrote this error out code, it deals with encoding and RCPC channel code
Anyway.. I am getting this error when I execute it. This is the only error I am gettin and not able to solve it

please help.....
Tavisha

[ code]

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>

void err (float eprob)

{
FILE *f1, *f2;
int r,num=0;
float x;
float r_num;
char a,b='0', c ='1';
f1= fopen("rcpcputput.txt","r");
f2=fopen( "erroutput.txt","w");

printf("\n Enter the error probability");
scanf("%1f",&eprob);
printf("\n Error probability is %1f",eprob);

while (!feof(f1))
{
fscanf(f1,"%c",&a);
printf("\n read is %c",a);
r=(10000);
printf("random is %d",r);
x=(float)r;

r_num=x/10000;
if (r_num<eprob)
{
if (a==
a=c;
else a=b;
num++;
}
fprintf (f2,"%c",a);
printf("random is %f probabilty is %f written is %c",r_num,eprob,a);

}
printf("\n\n Number of bit errors is %d",num);
fclose(f1);
fclose(f2);
getch;
}

[code ends]

C:\TurboCPP\C code\MyErr.c||In function `void err(float)':|
C:\TurboCPP\C code\MyErr.c|43|warning: statement is a reference, not call, to function `getch'|
C:\Program Files\CodeBlocks\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\libmingw32.a(main.o):main.c:(.text+0x104)|| \undefined reference to `_WinMain@16'|
||=== Build finished: 1 errors, 1 warnings ===|



I even tried to get the MINGW \bin\..lib file in my c:\ turbocpp\C code file but no help there!!!


Looking forward to replies...

Thanks....
The error I get is :

[no2pencil]

I don't see your main code block anywhere? Every c/c++ program must have main.

Also :

[red_4900]

Please the next time u post.

I'm not sure about this as I dont have my compiler right now, but I think in any code, there should be one 'main' function, which I dont see in ur code. try rename ur function to 'main'. correct me if I'm wrong anyway

[gabehabe]

\undefined reference to `_WinMain@16'|

That's the problem... It is just because you haven't got a main function in your code. Try fixing that.

The other thing is:
C:\TurboCPP\C code\MyErr.c|43|warning: statement is a reference, not call, to function `getch'|
That's at the end of your code, it should be getch(); - you missed the brackets

This post has been edited by gabehabe: 30 March 2008 - 09:26 PM

[Tavisha]

HI There


thanks for the replies.

I put int main() before the code but it gives me this error now...

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>

int main()
void err (float eprob)

{
   FILE *f1, *f2;
   int r,num=0;
   float x;
   float r_num;
   char a,b='0', c ='1';
   f1= fopen("rcpcputput.txt","r");
   f2=fopen( "erroutput.txt","w");

	printf("\n Enter the error probability");
	scanf("%1f",&eprob);
	printf("\n Error probability is %1f",eprob);

	while (!feof(f1))
	{
		fscanf(f1,"%c",&a);
		printf("\n read is %c",a);
		r=(10000);
		printf("random is %d",r);
		x=(float)r;

		r_num=x/10000;
		if (r_num<eprob)
		 {
			 if (a==b)
			 a=c;
			 else a=b;
			 num++;
		 }
		fprintf (f2,"%c",a);
		printf("random is %f probabilty is %f written is %c",r_num,eprob,a);

	}
   printf("\n\n Number of bit errors is %d",num);
   fclose(f1);
   fclose(f2);
   getch();
}

Error is : C:\TurboCPP\C code\MyErr.c|6|error: expected initializer before "void"|
||=== Build finished: 1 errors, 0 warnings ===|



What should I do nw?

[gabehabe]

You can't declare or define a function in your main()
Try rearranging your code like so:

//declare the function
void err(float eprob);

int main()
{
    . . .
    //call the function
    err(float eprob);
    . . .
}

//define the function
void err(float eprob)
{
    . . .
}

Hope this helps

[Tavisha]

Now I get this error !!!!

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>


void err (float eprob);

int main()

 {

   FILE *f1, *f2;
   int r,num=0;
   float x;
   float r_num;
   char a,b='0', c ='1';
   f1= fopen("rcpcputput.txt","r");
   f2=fopen( "erroutput.txt","w");


	   err(float eprob);

	printf("\n Enter the error probability");
	scanf("%1f",&eprob);
	printf("\n Error probability is %1f",eprob);


	while (!feof(f1))

	{
		fscanf(f1,"%c",&a);
		printf("\n read is %c",a);
		r=(10000);
		printf("random is %d",r);
		x=(float)r;

		r_num=x/10000;
		if (r_num<eprob)
		 {
			 if (a==b)
			 a=c;
			 else a=b;
			 num++;
		 }
		fprintf (f2,"%c",a);
		printf("random is %f probabilty is %f written is %c",r_num,eprob,a);

	}
   printf("\n\n Number of bit errors is %d",num);
   fclose(f1);
   fclose(f2);
   getch();
}

Error:
C:\TurboCPP\C code\MyErr.c||In function `int main()':|
C:\TurboCPP\C code\MyErr.c|21|error: expected primary-expression before "float"|
C:\TurboCPP\C code\MyErr.c|24|error: `eprob' was not declared in this scope|
||=== Build finished: 2 errors, 0 warnings ===|



Hellpppppp

[red_4900]

because there's only function prototype that u declared there.

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>


void err (float eprob);	 /*this is function prototype*/

int main()

{
........
}

where's ur 'err' function? I dont see it anywhere in ur code.

int main()

{
........
}

void err(float eprob)	  /*after main function, there should be a 'err' function here*/
{
......					 /*and the function should be doing something*/
}

hope this helps!

This post has been edited by red_4900: 31 March 2008 - 07:11 AM

[Tavisha]

what does this mean?



C:\TurboCPP\c_work\ERR.C|6|error: expected initializer before "void"|
||=== Build finished: 1 errors, 0 warnings ===|


????
Thats the only error Iget when I jus put int main () in the begining of the code.

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>

int main()
   void  err(float e_prob)
{
	FILE *f1, *f2;
	int r,num=0;
	 float x;
	float r_num;
	char a,b='0',c='1';
	f1=fopen("ENCODED.txt","r");
	f2=fopen("errout.txt","w");

	printf("\nEnter error probability");
	scanf("%lf",&e_prob);
	printf("\nError prob is %lf",e_prob);

	while(!feof(f1))
	{
		fscanf(f1,"%c",&a);
		printf("\nread is %c ",a);
		r=(10000);
		printf("random is %d ",r);
		x=( float)r;
		r_num=x/10000;
		if (r_num<e_prob)
		{
			if (a==b)
			a=c;
			else
			a=b;
			num++;
		}
		fprintf(f2,"%c",a);
		printf("rnd is %f prob is %f written is %c",r_num,e_prob,a);
  //		delay(10);
	}
	printf("\n\nNumber of bit errors is %d",num);
	fclose(f1);
	fclose(f2);
//	getch();
}

Error:C:\TurboCPP\c_work\ERR.C|6|error: expected initializer before "void"|
||=== Build finished: 1 errors, 0 warnings ===|

[Tavisha]

some one pleasssee give me any directions !!

waiting for ur replies.....

[red_4900]

where did u get the code? or u done it urself? because u declared the function 'err' but u never define it anywhere in ur code. and it has been mentioned before that function prototype should be declared before 'main' function not in the 'main' function.

[Tavisha]

hey there

thanks for ur replies..

I got it working nwo.. I was mixing the two things.

anyhow, this is a code I am trying to learn. it is someone elses.

Thanks once again...