what does these errors mean? (c programming)

shengchieh · 06-07-2005, 01:22 PM

To All:

I'm converting some of my fortran codes to c, so still a
beginner at c. I'm stumped. What does this error message
means?

/usr/lib/gcc-lib/i486-linux/3.3.2/../../../crt1.o(.text+0x18): In function `_start':
: undefined reference to `main'
/tmp/ccjwozJK.o(.text+0x25d): In function `Main':
: undefined reference to `fprint'
/tmp/ccjwozJK.o(.text+0x2a8): In function `Main':
: undefined reference to `fprint'
collect2: ld returned 1 exit status

My print statment (repeated twice) is

fprint("%i %f %f %f \n",
ipay,balbeg,xint[ipay],bal[ipay]);

where earlier I defined

float balbeg,bal[200],xint[200],xpay[200];
int npay,ipay;

The error "reference to main" seems to be unrelated to fprint.
[So I probably have two different errors]

Thanks in advance for any help.

Sheng-Chieh

lowpro2k3 · 06-07-2005, 01:26 PM

Do you have a 'main' function?

Code:

#include <stdio.h>

int main(int argc, char **argv)
{
    /* your code goes here... */
    float balbeg,bal[200],xint[200],xpay[200];
    int npay,ipay;

    /* etc...  */
    return 0;
}

Thats usually the reason behind an "undefined reference to `main`" error.

chrism01 · 06-07-2005, 10:51 PM

BTW, just in case you hadn't been told, C is case sensitive.
Also, fprint will require you to include stdio lib
ie
#include <stdio.h>
at the top of your src file.

btmiller · 06-07-2005, 10:58 PM

Also, it's fprintf, not fprint.

enemorales · 06-08-2005, 02:09 AM

I think that in this case he means neither fprint nor fprintf, but printf. fprint does not exist and fprintf requires a file handler that isn't being provided in the code.