INFORMIX-ESQL/C Programmer's Manual ESQL/C Function Library

The deccvdbl() function converts a C double type number into a decimal type number.

mint deccvdbl(dbl_val,  np)

	double  dbl_val;

	dec_t  *dec_val;

 



dbl_val

is the double value that deccvdbl() converts to a decimal type value. 


dec_val  

is a pointer to a decimal structure where deccvdbl() places the result of the conversion. 

The file deccvdbl.ec in the demo directory contains the following sample program.

/*
* deccvdbl.ec *

The following program converts two double type numbers to DECIMAL numbers
and displays the results.
*/

#include <stdio.h>

EXEC SQL include decimal;

char result[41];


main()
{
mint x;
dec_t num;
double d = 2147483647;

printf("DECCVDBL Sample ESQL Program running.\n\n");

printf("Number 1 (double) = 1234.5678901234\n");
if (x = deccvdbl((double)1234.5678901234, &num))
{
printf("Error %d in converting double1 to DECIMAL\n", x);
exit(1);
}
if (x = dectoasc(&num, result, sizeof(result), -1))
{
printf("Error %d in converting DECIMAL1 to string\n", x);
exit(1);
}
result[40] = '\0';
printf(" String Value = %s\n", result);

printf("Number 2 (double) = $.1f\n", d);
if (x = deccvdbl(d, &num))
{
printf("Error %d in converting double2 to DECIMAL\n", x);
exit(1);
}
if (x = dectoasc(&num, result, sizeof(result), -1))
{
printf("Error %d in converting DECIMAL2 to string\n", x);
exit(1);
}
result[40] = '\0';
printf(" String Value = %s\n", result);

printf("\nDECCVDBL Sample Program over.\n\n");
exit(0);
}

DECCVDBL Sample ESQL Program running.

Number 1 (double) = 1234.5678901234
String Value = 1234.5678901234
Number 2 (double) = 2147483647.0
String Value = 2147483647.0

DECCVDBL Sample Program over.