formatting float variables to fprintf function

[hpy_awad]

formatting float variables to fprintf has error to my writing to
output file called rental and I do not the reason that a rabish is
written to the file instead of the actual input screen values ?

#include <stdio.h>
//part09_le01_fil e_processing_fi le_setup_ver_01 _iti_r01_ch09.c
struct name {
int int___member1;
float float_member2;
char char__member3;
};
main()
{
struct name record;
FILE *fpointer;
fpointer=fopen( "rental","w ");
char another;

do {
input_record(&r ecord);
fprintf(fpointe r,"%4d %f %c\n",record);
printf (" \nADD ANOTHER RECORD ----> ( y / n ) : ");
scanf("\n");
scanf("%c",&ano ther);
} while (another=='y');
return 0;
}
input_record(re c)
struct name *rec;
{
printf("\nEnter int___member1: ");
scanf("%4d",&(* rec).int___memb er1);
printf("\nEnter float_member2: ");
scanf("%f",&(*r ec).float_membe r2);
printf("\nEnter char__member3: ");
scanf("\n");
scanf("%c",&(*r ec).char__membe r3);
}

[Alan Coopersmith]

hp******@yahoo. com (hp******@yahoo .com) writes in comp.unix.solar is:
|struct name {
|int int___member1;
|float float_member2;
|char char__member3;
|};
|fprintf(fpoint er,"%4d %f %c\n",record);

You only provide one argument to fprintf, but ask it to print 3 things,
so it just makes up random garbage for the values of the second and
third. You must specify a value for every %-specifier - you can't just
put the struct there - you need to do:
fprintf(fpointe r,"%4d %f %c\n", record.int___me mber1,
record.float_me mber2, record.char__me mber3);

--
_______________ _______________ _______________ _______________ ____________
Alan Coopersmith al***@alum.calb erkeley.org
http://www.CSUA.Berkeley.EDU/~alanc/ aka: Al************* *@Sun.COM
Working for, but definitely not speaking for, Sun Microsystems, Inc.

[Barry Schwarz]

On 1 Jan 2004 15:48:14 -0800, hp******@yahoo. com (hp******@yahoo .com)
wrote:

formatting float variables to fprintf has error to my writing to
output file called rental and I do not the reason that a rabish is
written to the file instead of the actual input screen values ?

#include <stdio.h>
//part09_le01_fil e_processing_fi le_setup_ver_01 _iti_r01_ch09.c
struct name {
Learn to indent. It will save you a lot of trouble later.
int int___member1;
float float_member2;
char char__member3;
};
main()
{
struct name record;
FILE *fpointer;
fpointer=fopen ("rental","w ");
char another;

do {
input_record(& record);
There is no prototype in scope for input_record.
fprintf(fpoint er,"%4d %f %c\n",record);
Here is your problem. fprintf will not dive into your structure to
retrieve the members. You must do it yourself with something like
fprintf(fpointe r, "%4d %f %c\n",
record.int___me mber1,
record.float_me mber2
record.char__me mber3);
printf (" \nADD ANOTHER RECORD ----> ( y / n ) : ");
scanf("\n");
scanf("%c",&an other);
} while (another=='y');
return 0;
}
input_record(r ec)
struct name *rec;
Why are you still using this obsolete style for a function definition?
{
printf("\nEnte r int___member1: ");
scanf("%4d",&( *rec).int___mem ber1);
The -> operator is much preferred over the convoluted dereference
syntax you have:
scanf("%4d",&re c->int___member1) ;
printf("\nEnte r float_member2: ");
scanf("%f",&(* rec).float_memb er2);
printf("\nEnte r char__member3: ");
scanf("\n");
scanf("%c",&(* rec).char__memb er3);
}

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