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标题: 函数大全(v开头) [打印本页]

作者: 韩冰    时间: 2004-10-4 02:53
标题: 函数大全(v开头)
<><FONT color=#ff0000>函数名: vfprintf </FONT>, w% z) c. G. ?% [5 ^
功 能: 送格式化输出到一流中
. C' Y; t  X! w" l& s4 @! Z用 法: int vfprintf(FILE *stream, char *format, va_list param);
) j5 H% l: l9 N9 z3 F" O程序例: </P>
  e# r" V% _( K& `  K<><FONT color=#0000ff>#include <STDIO.H>
1 b& n: D) o, [- h#include <STDLIB.H>1 u7 H9 E) b) q6 V3 w
#include <STDARG.H></FONT></P>
- F+ [! Q9 m: [<><FONT color=#0000ff>FILE *fp; </FONT></P>
- `5 x7 {  D+ z<><FONT color=#0000ff>int vfpf(char *fmt, ...)
% h% e0 Q+ t0 u, |5 i) M) p$ m+ @{ % z5 X; t- M# J! h1 [/ e+ r" b6 Y3 E
va_list argptr;
+ G& n; J. E/ p. q) aint cnt; </FONT></P>( P- u& h, G/ k* G0 B( P
<><FONT color=#0000ff>va_start(argptr, fmt); ( |" M  n# S2 T. ~% v% C+ k; d& [  ^
cnt = vfprintf(fp, fmt, argptr); - f7 n: Q* }' X/ E# K- q$ B: y# E% I
va_end(argptr); </FONT></P>
4 C3 [& H9 V) b& @: C<><FONT color=#0000ff>return(cnt);
! t: H$ q8 ?4 P7 {. o2 ]} </FONT></P>
, S% J- P9 c1 |* M7 ?- d4 i# J<><FONT color=#0000ff>int main(void)
$ o( O0 j2 ]0 m{
9 N# l( o) ?1 E3 dint inumber = 30; : R1 H) h. m2 w6 \& \
float fnumber = 90.0; & ~' M8 P5 J5 i+ ^
char string[4] = "abc"; </FONT></P>& C9 ^8 Q" Y5 \  F9 \: |- X+ y! v
<><FONT color=#0000ff>fp = tmpfile(); 4 y: t8 X, h) b" ~0 t& D  E
if (fp == NULL)
: k+ n. F6 x+ J9 J{
1 t! A$ C$ G. R5 a( nperror("tmpfile() call");
1 [( L$ I8 _: L7 aexit(1);
- P) l6 J$ e! D* S: t} </FONT></P>7 s' e. [0 p# F: ?5 F% w/ T
<><FONT color=#0000ff>vfpf("%d %f %s", inumber, fnumber, string);
! n5 t1 o3 B6 Y) yrewind(fp); # H0 X7 v7 Y+ B! m: q' ~, C8 I6 }
fscanf(fp,"%d %f %s", &amp;inumber, &amp;fnumber, string);
. l' P3 e" N* O0 c% ?printf("%d %f %s\n", inumber, fnumber, string); $ Q! V% k! ]5 J' |5 E  v4 n
fclose(fp); </FONT></P>
; v0 M" p8 g7 M7 j( o# D3 T<><FONT color=#0000ff>return 0; 5 C: b4 J; v" ~2 C1 d5 w
}
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</FONT></P>
; M/ j: Q& {. @<><FONT color=#ff0000>函数名: vfscanf </FONT>
: v! G% N" V% J8 U功 能: 从流中执行格式化输入
2 V6 ]# e9 J2 ^) W4 c+ T% q用 法: int vfscanf(FILE *stream, char *format, va_list param);
/ @) P3 Z% @( y/ a程序例: </P>. w4 T4 U$ G9 b: S. G
<><FONT color=#0000ff>#include <STDIO.H>
# {( ]2 G" N, @. g# T3 G- n#include <STDLIB.H>
7 `* S3 k9 r: ]% N#include <STDARG.H></FONT></P>
0 L$ R$ t/ D. J% L% w<><FONT color=#0000ff>FILE *fp; </FONT></P>
! R/ X1 L+ \" Z/ v" i<><FONT color=#0000ff>int vfsf(char *fmt, ...)
' q" ^: j7 W- X. C! `5 R{ 9 b4 z) O6 W/ k% X# H" a
va_list argptr;
0 i9 V4 q1 j6 {6 G& {! Rint cnt; </FONT></P>5 j; s: r% u- T; ^9 W, d! w
<><FONT color=#0000ff>va_start(argptr, fmt); & v/ i. m$ J7 C" S2 U. ]: U
cnt = vfscanf(fp, fmt, argptr);
' G% t. G3 k- R% s  `va_end(argptr); </FONT></P>
& @6 u3 Z+ z) k<><FONT color=#0000ff>return(cnt);
0 f3 s6 _, s( M1 }' t5 j5 E& e6 |} </FONT></P>
0 ]/ j% C5 s- w<><FONT color=#0000ff>int main(void) ! o7 v) M' z: @7 W% s
{ ' P7 R% `" O0 D- F
int inumber = 30;
4 a4 @1 F1 x9 pfloat fnumber = 90.0;
! v$ p( G& X/ L1 Pchar string[4] = "abc"; </FONT></P>: D+ W4 C! c/ E  O& L" |
<><FONT color=#0000ff>fp = tmpfile(); - b8 s5 I) V" g; @' E7 X7 `
if (fp == NULL)
5 n. r3 t2 {+ Z! w/ `5 E{ ' w& h" e* ?3 j% N4 c( h
perror("tmpfile() call");
- p6 G* n5 S& ]9 _9 Fexit(1);
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fprintf(fp,"%d %f %s\n",inumber,fnumber,string);
; a2 U$ _2 @) g5 m" Hrewind(fp); </FONT></P>3 B& G- }0 U/ |9 }2 ]- M- N8 g
<><FONT color=#0000ff>vfsf("%d %f %s",&amp;inumber,&amp;fnumber,string);
" F% N: W! j4 [# o1 \printf("%d %f %s\n",inumber,fnumber,string);
& u( }' w! b0 R" S$ efclose(fp); </FONT></P>
8 |* W  u4 a4 X- @( x: G<><FONT color=#0000ff>return 0; % U, U' _7 p2 `. T6 a' o; A
} % S) h( G$ _. t9 T5 f, ~
</FONT>) x" t( K, T' |  [* g3 g  T# e0 r
</P>& D8 ?7 H* o/ C3 ^8 H) @4 x
<><FONT color=#ff0000>函数名: vprintf </FONT>  p, `: y, L  R  Z
功 能: 送格式化输出到stdout中   L& ~0 P4 v$ x/ h2 _
用 法: int vprintf(char *format, va_list param); ! a* G) l+ C- v5 ]- ]0 |! ^! H+ S$ W
程序例: </P>, L8 l+ D+ P" j1 u5 J
<><FONT color=#0000ff>#include <STDIO.H>
4 C! P/ A/ w+ }. L: m! C#include <STDARG.H></FONT></P>
1 K3 q, x, X% D<><FONT color=#0000ff>int vpf(char *fmt, ...) 5 i) Z- H. p. ~, V* _  w7 P5 [/ n( C1 |5 f
{
8 z' Z3 |  F8 M. N' Z$ }va_list argptr; ! E3 R. l- f$ `3 p! T2 q
int cnt; </FONT></P>: u( S3 _; b  f- J  D
<><FONT color=#0000ff>va_start(argptr, format); ' r5 P" {9 u) l  S1 N5 Z& M% F
cnt = vprintf(fmt, argptr);
7 r; [& H( ]: }- Ava_end(argptr); </FONT></P>" \2 o% O: ]6 ^+ \9 Q
<><FONT color=#0000ff>return(cnt);
: h- O+ i: F. t2 x# Y$ v+ j' N' V} </FONT></P>0 {0 k4 H; S3 w& W; c
<><FONT color=#0000ff>int main(void) ; q5 k% R; O/ V1 O9 Y/ S
{ 1 R- K# d2 {% U) }( f# d) L
int inumber = 30; ( s: h1 A2 y/ m% S; M
float fnumber = 90.0;
# U1 u& Z; m' _6 i2 x; P4 Jchar *string = "abc"; </FONT></P>- i& e. B3 A' _' ^# f9 \' v
<><FONT color=#0000ff>vpf("%d %f %s\n",inumber,fnumber,string); </FONT></P>
# O7 ~. `1 p6 G<><FONT color=#0000ff>return 0;
, A3 x. W+ m  B/ A2 i}
1 \3 z9 F: z$ d& w8 _+ N! K* p
5 l2 w& b/ _! O  t; N3 k</FONT></P>
) Z/ K& Z! }( G% a! k<><FONT color=#ff0000>函数名: vscanf </FONT>
3 _" D8 x" J4 R1 f/ \功 能: 从stdin中执行格式化输入 . Q$ h. B- D9 n. g- t! S
用 法: int vscanf(char *format, va_list param); 1 o- o; {3 y" x: \" m7 f) S2 V/ Z
程序例: </P>
& N3 m. N6 U, g- x<><FONT color=#0000ff>#include <STDIO.H>
$ @! ?, O4 v6 Y! t( F, ~9 `% J#include <CONIO.H>: K+ v+ i% o5 U0 A! ]4 k
#include <STDARG.H></FONT></P>" T+ i$ W5 |+ t2 w7 n; s
<P><FONT color=#0000ff>int vscnf(char *fmt, ...)   h  F0 E' `: T! I5 Q( x
{
, T& y5 w8 [; V7 u+ J5 j5 cva_list argptr; & a1 y! J. t4 D7 Q9 ]2 j, l
int cnt; </FONT></P>
2 n5 e+ j, h/ r! s" h<P><FONT color=#0000ff>printf("Enter an integer, a float, and a string (e.g. i,f,s,)\n"); 3 ^7 j4 v; W: j2 v
va_start(argptr, fmt);
3 `% H' L3 {: N# Y. A' Vcnt = vscanf(fmt, argptr);
8 l, I" {9 g  G% s, K1 O) Kva_end(argptr); </FONT></P>
% j8 j3 \6 u: m) W$ h<P><FONT color=#0000ff>return(cnt);
1 P3 r9 I- H8 {} </FONT></P>9 w6 c/ P3 A3 u
<P><FONT color=#0000ff>int main(void) 9 A+ U0 F9 C1 \. P- j) l" z* F
{ 8 a& m) s5 A3 P
int inumber; * a) Y% ?! _8 l
float fnumber;
2 `( E2 u$ ^( ^4 U- H" uchar string[80]; </FONT></P>
  h6 s6 S- _% I8 Z& f<P><FONT color=#0000ff>vscnf("%d, %f, %s", &amp;inumber, &amp;fnumber, string); # l6 s- Z0 P; b
printf("%d %f %s\n", inumber, fnumber, string); </FONT></P>: U( u" Q  t$ S5 z" i1 z6 W
<P><FONT color=#0000ff>return 0;
0 _1 g3 H) b4 _. t0 v}
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</FONT>
0 E& a9 x: e  }9 l' R7 [; m' p</P>8 z: @! \1 g3 A- V) c, y5 C" F5 P
<P><FONT color=#ff0000>函数名: vsprintf </FONT>
# V4 W, |5 T0 }, G功 能: 送格式化输出到串中
8 ^* G! M  }. L6 u# W用 法: int vsprintf(char *string, char *format, va_list param);
( B8 n; t& _: H) p" K9 k0 k  o程序例: </P>! N* ?1 i4 Y  d6 m  H
<P><FONT color=#0000ff>#include <STDIO.H>
! Z' x5 d8 @7 L% I0 b7 n#include <CONIO.H>
2 `" Y9 b9 t" A4 [#include <STDARG.H></FONT></P>1 e: p& v7 ]1 J1 a; J# J
<P><FONT color=#0000ff>char buffer[80]; </FONT></P>
7 J1 |' n" I5 o; [4 C) X% D' `3 k+ Q<P><FONT color=#0000ff>int vspf(char *fmt, ...) 8 r* ~3 [- F/ h7 N
{ " n* q2 x8 c& s
va_list argptr; , Q  Q: J# Y+ g: t
int cnt; </FONT></P>& F; @3 J, O. H: Y
<P><FONT color=#0000ff>va_start(argptr, fmt);
# f- M2 |0 [1 D) X$ {* ]3 zcnt = vsprintf(buffer, fmt, argptr); 5 O& G, S0 X& Q3 u( T8 S
va_end(argptr); </FONT></P>
! c3 V( Y$ x: P1 P6 E<P><FONT color=#0000ff>return(cnt);
8 ^: x# T, d8 r' X& `0 ?} </FONT></P>1 s5 H3 F  ^% @* U5 w3 w
<P><FONT color=#0000ff>int main(void)
, h& g. _) t6 z2 _1 U{ . ?8 H4 u3 L; s, f3 P8 U
int inumber = 30; , c' S1 m4 h4 t+ U1 q
float fnumber = 90.0; 5 @4 P4 k  g4 Y
char string[4] = "abc"; </FONT></P>
9 l5 q: V! a- P$ m  F* Q<P><FONT color=#0000ff>vspf("%d %f %s", inumber, fnumber, string); ( A% `4 o, i) ?. b/ E% r
printf("%s\n", buffer); 4 t! v% {# _- ~  g  F
return 0;
& h: x! }( i+ ~5 k  f}
' U8 h, I: I' H0 X
3 {- x# z( Q' J9 I</FONT>5 B- s- E+ ?- U* i9 }1 F# K9 c
</P>. e" G1 E: e% k& D# a" z
<P><FONT color=#ff0000>函数名: vsscanf </FONT>
+ z* r0 M& D+ |, k9 y+ D8 F功 能: 从流中执行格式化输入 1 x( ~6 v1 Y9 X, Y0 [3 U
用 法: int vsscanf(char *s, char *format, va_list param); + j) o8 U# g$ ^, M/ e0 _
程序例: </P>- g: j8 }% C; M# X7 H0 p7 {! x- l
<P><FONT color=#0000ff>#include <STDIO.H>
: M7 {7 y$ r) n  o" i% k+ |#include <CONIO.H>
0 \& {$ f: B- |- U( t. l( u- U& x6 W#include <STDARG.H></FONT></P>: V2 n% Z1 e/ x
<P><FONT color=#0000ff>char buffer[80] = "30 90.0 abc"; </FONT></P>
. Q+ Z' {* d2 K4 _& ?7 c. Y+ Z<P><FONT color=#0000ff>int vssf(char *fmt, ...) $ A8 n4 G$ U0 V" m* {% x( z0 Z
{
$ Q. \5 G  P+ O' H8 L' n- C( Mva_list argptr;
8 l* V* Y3 c: H3 l5 U  q- p3 j9 Uint cnt; </FONT></P>8 B1 z! }0 M7 y" |, M
<P><FONT color=#0000ff>fflush(stdin); </FONT></P>
0 u9 |4 {1 R+ k5 d8 Y3 v<P><FONT color=#0000ff>va_start(argptr, fmt); % E0 I/ t" w' @1 d9 l" b
cnt = vsscanf(buffer, fmt, argptr); % L* n) j$ }1 B
va_end(argptr); </FONT></P>' O7 k1 G& l: c0 `$ M5 u! D& L3 g
<P><FONT color=#0000ff>return(cnt); 8 j$ W) e9 s4 s
} </FONT></P>
$ X( `! b  z3 {7 M<P><FONT color=#0000ff>int main(void) " f5 i' u) y# C
{ 7 E' l, s- B6 f; [6 L% d/ z
int inumber;
' I# t3 F+ N, H& h! `2 Q$ P0 `& b, Pfloat fnumber;
4 f. E$ q  S' H; N  C" r: Dchar string[80]; </FONT></P>
6 f6 Y6 h" _7 d2 r<P><FONT color=#0000ff>vssf("%d %f %s", &amp;inumber, &amp;fnumber, string); ; r* R$ p8 m" m( ~: \6 ~' l
printf("%d %f %s\n", inumber, fnumber, string);
- Z: u7 Y  f9 ^4 [7 preturn 0;
5 D* c$ e8 S. N7 p} </FONT></P>




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