[linuxsh-dev] Floating point problem

[Bao C. H. <ba...@se...>]

I am having problems with the following code.  It works fine
in an x86 system.  The problem is at the minus sign of the
datum.  The scanf is doing something weird.  Changing "%f"
to "%lf" in the scanf statement makes it work again.

==== test.c =====
[bao@build bao]$ cat test.c
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>


int main()
{
 FILE *fptr;
 float dum;
 int status;
 fptr=fopen("./DATA", "r");
 while (!feof(fptr)){
        status = fscanf(fptr,"%f", &dum);
        printf("\n status=%x\n", (int)status);
        if (status)
           printf("\n dum=%f\n", dum);
 }
}

[bao@build bao]$ sh4-linux-gcc test.c -o test

=== Output of test ===
[root@mgatebao /root]# ./test

 status=1

 dum=0.000000

 status=1

 dum=0.951057

 status=1

 dum=0.587785

 status=%x

 dum=%f
|AGNUÿÿÿÿÿÿÿÿ¨A¼@Ø@ô@@,@H@d@M¬
À@ä@D@                          @@
±
 €ATÔ@þÿÿo´@ÿÿÿoðÿÿo @GCC: (GNU) 2.97 20001120 (experimental)GCC: (GNU) 2.97
200
01120 (experimental)GCC: (GNU) 2.97 20001120 (experimental)GCC: (GNU) 2.97
20001
120 (experimental)GCC: (GNU) 2.97 20001120 (experimental)GCC: (GNU) 2.97
2000112
0
(experimental).symtab.strtab.shstrtab.interp.hash.dynsym.dynstr.gnu.version.
gn
u.version_r.rela.plt.init.plt.text.fini.rodata.data.note.ABI-tag.ctors.dtors
.got
.dynamic.sbss.bss.commentô<)
                            D@D 1ä@ä»9ÿÿÿo @ Fþÿÿo´@´ UÔ@ÔT
                                                                _@@@V
e˜@˜àj€@€@
@LÀ@À6 v0§ô@D@ä@ @´@Ô@@˜@™xA €A€€@¨A¨®AA¹öF     Âð
À@
  ø@
PApAxA€A¨AAAñÿAñÿñÿñÿñÿŒñÿñÿÊ°@
Segmentation fault

=== Input: DATA ===

[root@mgatebao /root]# cat DATA
  0.0000000e+000
  9.5105652e-001
 +5.8778525e-001
 -9.5105652e-001
==================

Appreciate any suggestions/comments.

Thanks.
Bao