undefined reference to strcmp in C

[jon zendatta]

hell0..i'm a learner learning slowly. my problem is a comparison between string constant & string variable.
#include <stdio.h>
#include <string.h>

main ()
{
int bins, kgs, packout, dollars_total, dollars_ha ;
float net_kg, net_cartons, dollars_per_carton;
float bb = 2.5,
rg = 1.0,
f = 1.85,
pb = 0.5,
pr = 0.55,
pq = 0.25,
gs = 0.5;
char str1[] = "braeburn";
char str2[] = "royal gala";
char str3[] = "fuji";
char str4[] = "pacific beauty";
char str5[] = "pacific queen";
char str6[] = "pacific rose";
char str7[] = "granny smith";
char cultivar [15];

printf("please enter cultivar\n", cultivar);
scanf("%s", &cultivar);
printf("number of bins\n", bins);
scanf("%d", &bins);
printf("enter packout\n", packout);
scanf("%d", &packout);

kgs = (bins * 320);
net_kg = (int)(kgs * packout);
net_cartons = (int)(net_kg / 18);

printf("enter $ per carton\n", dollars_per_carton);
scanf("%f", &dollars_per_carton);

dollars_total = (int)(dollars_per_carton * net_cartons);

if (!(strcmp(cultivar, "braeburn") == 0))
{
dollars_ha = (int)(dollars_total / bb);
printf("returns $%d per ha\n", dollars_ha);
}
if (!(strcmp (cultivar, "royal gala") == 0))
{
dollars_ha = (int)(dollars_total / rg);
printf("returns $%d per ha\n", dollars_ha);
}
if (!(strmcp (cultivar, "fuji") == 0))
{
dollars_ha = (int)(dollars_total / f);
printf("returns $%d per ha\n", dollars_ha);
}
if (!(strcmp (cultivar, "pacific beauty") == 0))
{
dollars_ha = (int)(dollars_total / pb);
printf("returns $%d per ha\n", dollars_ha);
}
if (!(strcmp (cultivar, "pacific queen") == 0))
{
dollars_ha = (int)(dollars_total / pq);
printf("returns $%d per ha\n", dollars_ha);
}
if (!(strcmp (cultivar, "pacific rose") == 0))
{
dollars_ha = (int)(dollars_total / pr);
printf("returns $%d per ha\n", dollars_ha);
}
if (!(strcmp (cultivar, "granny smith") == 0))
{
dollars_ha = (int)(dollars_total / gs);
printf("returns $%d per ha\n", dollars_ha);
}
}

[jon zendatta]

ps: that happy face ain't supposed to be there either.

cheers

[lisati]

ps: that happy face ain't supposed to be there either.

cheers
The happy face is something to do with the way the forums interpret certain character strings.....something to think about while other forum members are contemplating a reply to your original question.

EDIT: Possible typo: there's a "strmcp" there instead of a "strcmp" where you're checking for fuji.

[-grubby]

Enclosing that in [ code ] tags (no spaces) would greatly increase legibility and we could see any indentation you had, and probably get rid of the smiley too. Too bad I can't help you with any of that C

[jon zendatta]

i don't think indentation makes a scrap of difference nathan. 41 + 1 = 42 thank you - perhaps i should've posted this in 'absolute beginners.

[-grubby]

i don't think indentation makes a scrap of difference nathan. 41 + 1 = 42 thank you - perhaps i should've posted this in 'absolute beginners.

I wasn't saying that it did, but [ code ] still further segregates it from the page. Although I'm biased towards indentation because I use Python all the time

[nrs]

Because you're not typing strcmp ;-)

[nrs]

Indentation makes a difference for people trying to read it
Not using [code] murders your syntax
int yo main

[LaRoza]

Enclosing that in [ code ] tags (no spaces) would greatly increase legibility and we could see any indentation you had, and probably get rid of the smiley too. Too bad I can't help you with any of that C


i don't think indentation makes a scrap of difference nathan. 41 + 1 = 42 thank you - perhaps i should've posted this in 'absolute beginners.

Yes it does. If you posted it, you expect someone to read it. If you want someone to read it, make it not hard to read. Posting code in code or php tags is not only a good idea, but it is almost required (most people won't even read it without proper formatting)

Also, you declared main improperly (although that might only throw a warning, you shouldn't silently accept it)

[lisati]

Hey, I just noticed that I was born in the town showing in the OP's current location......

[cmay]

to answer the question about undefined reference to strcmp.
you need to include <string.h>


#include <stdio.h>
#include <string.h> /* you need to include string to use strcmp*/
int main(int argc, char** argv)
{
char hi_there[]="hello";
if( strcmp(hi_there,"hello")==0){
printf("hello world");
}

return 0;
}

hope it helped.

btw
i am newbie too so please dont kill me if it does not work :)

[nrs]

to answer the question about undefined reference to strcmp.
you need to include <string.h>


#include <stdio.h>
#include <string.h> /* you need to include string to use strcmp*/
int main(int argc, char** argv)
{
char hi_there[]="hello";
if( strcmp(hi_there,"hello")==0){
printf("hello world");
}

return 0;
}

hope it helped.

btw
i am newbie too so please dont kill me if it does not work :)

He did include <string.h>. Check the image I attached earlier.

[cmay]

sorry i did not see that.
i pasted the code from the first post and tried to compile it.
lots of errors. maybe i did not get the whole thing copied.
i was only trying to be helpfull.

nevermind my post then.

[nrs]

sorry i did not see that.
i pasted the code from the first post and tried to compile it.
lots of errors. maybe i did not get the whole thing copied.
i was only trying to be helpfull.

nevermind my post then.

It took me a minute or two to catch on myself. :(

[jamescox84]

What command are you using to compile your program. using `ld' to link your objects files often leads to this problem, as the standard c library is not linked by default using `ld' to the resulting executable.

Compile a single source file like this:


gcc your_source_file -o executable_name


If you still get error maybe the standard C library development files aren't installed, try:


sudo apt-get install libc6-dev