ECVT(3) Linux Programmer's Manual ECVT(3)NAME
ecvt, fcvt - convert a floating-point number to a string.
SYNOPSIS
#include <stdlib.h>
char *ecvt(double number, int ndigits, int *decpt, int *sign);
char *fcvt(double number, int ndigits, int *decpt, int *sign);
DESCRIPTION
The ecvt() function converts number to a null-terminated string of ndigits digits (where ndigits is reduced to an system-specific limit
determined by the precision of a double), and returns a pointer to the string. The high-order digit is nonzero, unless number is zero. The
low order digit is rounded. The string itself does not contain a decimal point; however, the position of the decimal point relative to the
start of the string is stored in *decpt. A negative value for *decpt means that the decimal point is to the left of the start of the
string. If the sign of number is negative, *sign is set to a non-zero value, otherwise it's set to 0. If number is zero, it is unspecified
whether *decpt is 0 or 1.
The fcvt() function is identical to ecvt(), except that ndigits specifies the number of digits after the decimal point.
RETURN VALUE
Both the ecvt() and fcvt() functions return a pointer to a static string containing the ASCII representation of number. The static string
is overwritten by each call to ecvt() or fcvt().
NOTES
These functions are obsolete. Instead, sprintf() is recommended. Linux libc4 and libc5 specified the type of ndigits as size_t. Not all
locales use a point as the radix character (`decimal point').
CONFORMING TO
SysVR2, XPG2
SEE ALSO ecvt_r(3), gcvt(3), qecvt(3), setlocale(3), sprintf(3)
1999-06-25 ECVT(3)
Check Out this Related Man Page
ECVT(3) Linux Programmer's Manual ECVT(3)NAME
ecvt, fcvt - convert a floating-point number to a string.
SYNOPSIS
#include <stdlib.h>
char *ecvt(double number, int ndigits, int *decpt, int *sign);
char *fcvt(double number, int ndigits, int *decpt, int *sign);
DESCRIPTION
The ecvt() function converts number to a null-terminated string of ndigits digits (where ndigits is reduced to an system-specific limit
determined by the precision of a double), and returns a pointer to the string. The high-order digit is nonzero, unless number is zero. The
low order digit is rounded. The string itself does not contain a decimal point; however, the position of the decimal point relative to the
start of the string is stored in *decpt. A negative value for *decpt means that the decimal point is to the left of the start of the
string. If the sign of number is negative, *sign is set to a non-zero value, otherwise it's set to 0. If number is zero, it is unspecified
whether *decpt is 0 or 1.
The fcvt() function is identical to ecvt(), except that ndigits specifies the number of digits after the decimal point.
RETURN VALUE
Both the ecvt() and fcvt() functions return a pointer to a static string containing the ASCII representation of number. The static string
is overwritten by each call to ecvt() or fcvt().
NOTES
These functions are obsolete. Instead, sprintf() is recommended. Linux libc4 and libc5 specified the type of ndigits as size_t. Not all
locales use a point as the radix character (`decimal point').
CONFORMING TO
SysVR2, XPG2
SEE ALSO ecvt_r(3), gcvt(3), qecvt(3), setlocale(3), sprintf(3)
1999-06-25 ECVT(3)
Hi all,
i am trying to use C in unix platform to convert a double variable (floating point) to a string variable.
i tried using sprintf, ecvt, fcvt,gcvt.
but all gave me funny output or altered the content.
does anyone know how to convert the data and keep the original content.
for... (3 Replies)
I have a column in % and I want to display it as a one decimal place number for sorting - what function would I be looking at for dropping the % sign? (2 Replies)
I need code for converting a string to a negative decimal value.
For ex, i have the value in the form of a string (5489.95-) i need to convert it into decimal value (-5489.95) while getting output using printf command.
i know how to get as a string
a="5489.95-"
printf "%10s"$a >>xyz.dat
... (5 Replies)
I want to write/print a number through a shell script up to its last significant digit (LSD) after the decimal point.
Say,
x=10.00056000000000000
I want to print x as x=10.00056.
Note that x can be any thing so I cannot know the position of the LSD always.
Thanks. (16 Replies)
Hello,
can someone help me in this
I have a file of sizes in kilobyte I want to caculte the sum in terabyte using awk
I would like to have one digit after the decimal point ( 2.8 TB for example)
cat file
2881301319
3061567196
3010347398
3029693706
2906516319
2444536488... (2 Replies)
Hi,
I have one input file which is delimited by pipe. I want to put decimal points in this input file at particular position in particular column and also get the negative sign (if any) at start of that column.
$ cat Input_file.txt
11|10102693|1|20151202|10263204|20151127|N|0001... (7 Replies)