; masm windows gui #
.686
.model flat
.XMM
include \masm32\include\windows.inc
include \masm32\include\user32.inc
includelib \masm32\lib\user32.lib
include \masm32\include\msvcrt.inc ; for crt_printf\crt_scanf
includelib \masm32\lib\msvcrt.lib
.data
x dd 2.1
y dq 1.1
z dt 6.3
format db "%.2g ",0
buffer db 90 dup(0)
.code
_Start: invoke crt_sprintf, ADDR buffer, addr format, [y],[y+4]
invoke MessageBox,0, ADDR buffer, 0,0
ret
end _Starthow to use a function of crt_sprintf display REAL4 and REAL10, maybe something artful specifiers?
Check real4$() in \Masm32\macros\macros.asm.
And "Check real10$() in \Masm32\macros\macros.asm"?
Yes indeed, but when studying that macro you will realise that real10$() gives you only REAL8 precision. For true REAL10 precision, you need a library that supports this format:
include \masm32\MasmBasic\MasmBasic.inc ; download (http://masm32.com/board/index.php?topic=94.0)
Init
fldpi ; put PI on the FPU
Inkey Str$("PI=%Ji", ST(0)) ; arg can be ST(x) or a REAL10 variable
Exit
end start
Output: PI=3.141592653589793238
jj2007, real4$ MACRO r4value:req
LOCAL buffer, r8value, r4tmp
.data?
r4tmp REAL4 ?
r8value REAL8 ?
buffer BYTE 48 dup(?)
IFNDEF r8fmt
.data
r8fmt BYTE "%lf", 0
ENDIF
.code
IFE issize(r4value, 4)
echo ------------------------
echo real4$ - requires REAL4
echo ------------------------
.ERR
ENDIF
IF isregister(r4value)
push r4value
pop r4tmp
finit
fld r4tmp
ELSE
finit
fld r4value <--
ENDIF
fstp r8value <--
fwait
mov buffer[0], 0
invoke crt_sprintf, ADDR buffer, ADDR r8fmt, r8value <--
EXITM <OFFSET buffer>
ENDMThis is a scam and not a solution!
It seems that crt_sprintf is ONLY for REAL8
Quote from: Mikl__ on October 24, 2013, 04:30:37 PM
It seems that crt_sprintf is ONLY for REAL8
Yes - since all floats will be automatically transformed to double in C if the parameter is "vararg".