冒险解谜游戏中文网 ChinaAVG
标题:
外国人的数学素质是差啊
[打印本页]
作者:
caimicn
时间:
2016-3-31 09:14
标题:
外国人的数学素质是差啊
游戏里有这样的谜题:要求
7 h3 y4 v; a1 Q/ P& o
(A+B-C)*D+E-F=7
7 g8 O! `- j1 t3 I+ e7 M
A、B、C、D、E、F为11、9、1、6、4、2的其中一个数值。
7 R- x0 s. ]: _# s- e8 ?
好吧!!
2 S# \- r9 v. a( L
第一解:
2 J( K) q5 ^& X- @# }8 m
: ?- M% l7 Q) @7 Y' s
(9-6+1)*4+2-11=7
% {# F, F. A. u! d5 [0 X
. @9 a5 m6 Y1 q$ n/ D
居然没通过
! {% Q, Q7 D c& F/ t, w! }6 _
' G! q( j# m7 @9 s6 j0 t
好吧!继续,第二解:
3 z9 N5 n9 m( ]. o6 @7 |
, ]( E6 t5 A( l f6 W
(9-4+1)*2+6-11=7
( x. \5 Q4 v. L( B" Q
6 z+ y! k( K- P" m
又说我是错的,
2 [+ N3 o* o0 Q3 e/ Z9 I8 |
0 V w; x! {9 e# i# M( y
没关系,我还有第三解:
/ j% R0 \7 ]: O& L4 T5 G; E
# `4 V! V; \% Q% g) z
(11-6+1)*2+4-9=7
6 Z. L2 |2 P( ^
+ a5 @% ^: D% h7 ?" Q: l& S6 k- `
我靠,又说我错的,我CAO,老外的数学全都是体育老师教的吗?我崩溃了
/ \# A$ I7 R/ m1 ?8 H) k* K- X
8 }( J1 b+ E! h! p( Z# B
还有没有第4解啊?第5解啊??
作者:
caimicn
时间:
2016-3-31 10:14
好了,找到第四种方法了
! B' G$ ~" ]% S) g8 |/ H
[attach]38187[/attach]
作者:
myq495
时间:
2016-3-31 11:06
国内人数学也有差的,不能以偏概全
作者:
xuyiqing
时间:
2016-3-31 22:55
哪个游戏啊?
作者:
飞翔的荷兰人
时间:
2016-4-8 16:03
如果老毛子不算外国人的话,楼主的话勉强算正确。
作者:
iguodala
时间:
2016-4-30 11:08
老外的数学绝对没我们学的深
作者:
tianzhe
时间:
2016-5-1 23:45
有一次有个游戏居然问X*Y=63,X和Y是多少,会背九九表的人都知道,可见他们的数学基础
作者:
血腥的情人节
时间:
2016-6-23 11:23
代入以下代码,得:11,9,4,2,1,6
滑稽~
, A5 U+ X* u5 \% b. W l" c" m$ V
7 @% C6 L3 d/ t: B5 }
#include <iostream>
# ]( n: W: P- f: H2 e
#include <string.h>
/ y. `8 j0 h( w/ M9 _: S/ K* {
using namespace std;
7 ^8 C- N) M: B8 g7 {
template <class T>
5 H2 a8 [- ]* q& Q1 p
class Node
. b# t0 v: T: w$ r5 A9 D
{
1 x" m7 c7 F3 c3 U( o& M# {2 Y
public:
) v8 v9 v' @7 b; ?) F
T data;
; L. K0 s! ^6 [9 z( M
Node<T> *next;
. E; o$ b, U* Y: f
Node()
0 Y' m. U. q; T$ D5 P; M, o M- Y4 r, S) i
{
; f5 ~$ u# Q6 @# t8 d+ z5 L& g6 x
this->next = NULL;
, k% r# I. C) q$ m9 D0 ^
}
- _& L2 ~2 E- t- h% b
Node(T data,Node<T> *next=NULL)
' e" J5 H$ W0 M; k2 b
{
) p/ t& A( U1 G% M
this->data = data;
1 {% h0 k% b" `: C: w
this->next = next;
- ^4 {* ?* N0 \" {
}
4 j6 j( g+ v7 p6 ^
};
5 X8 q, {1 H' e7 E. e0 N
5 L2 t) r+ C7 h* h6 g' O+ T
template <class T>
- O+ c# [; t0 j' ]5 E
class LinkedStack
z4 o1 A) z' }
{
$ f6 J" V) k5 E% u7 r3 v; E- T: k
private:
& ^9 t9 a2 c4 H% n5 d) M& C, W" D
Node<T> *top;
% O- w: L$ s) }
public:
0 I; Q5 |+ V. H8 n! F& J4 Y$ V4 D: i
LinkedStack();
5 c# Q1 m; A+ z9 d
~LinkedStack();
) d( W7 h$ x. X6 `$ a+ {
bool isEmpty();
$ G+ t( K/ h3 m0 L
void push(T x);
# j: D3 g# v: n' P
T pop();
- r1 [, k$ [( K5 r# ]+ s. @6 n7 k
T get();
* [! M- H+ S0 l Y1 d4 p
};
7 U( P; U6 H* ?, L$ W. \
! J" O# ^- M, v
template <class T>
' V$ r8 B) G5 v. o8 {) W& w; @) E
LinkedStack<T>::LinkedStack()
W# k9 r, @1 h
{
3 f1 n6 O/ ~& j' R+ K' d. M
top = NULL;
: [/ N2 B9 i5 \; ^
}
: _3 W& g- T( _% B/ A; W% @
: N7 l; e% k5 I
template <class T>
" R& c3 Y) q6 z8 P8 {; D& a: f* j
LinkedStack<T>::~LinkedStack()
0 y/ _% P7 f: A& j
{
/ E! L+ z3 P( @9 i. M& i1 L& n8 f
Node<T> *p = top;
8 M6 ]8 Z7 m D( i5 a9 \, N
Node<T> *q;
4 d5 E8 S2 U6 T# t" ]+ z8 Z: [
while(p!=top)
N# d& I3 z8 w- Q7 n6 j& M: G" m
{
0 C4 X. w/ Z& H9 }7 J* M* w
q = p;
t/ v1 d0 Z2 x( F( |
p = p->next;
0 f' ?5 n2 R0 y0 Q' z
delete p;
! f/ x8 f! I0 t* N2 b; {
}
/ b1 L! e0 J1 W/ Q* J G, s
top = NULL;
! V1 ^6 R1 u; v8 f! ^# J4 e, q9 X
}
- l. ~6 `+ \2 y6 ?. D( d; ?# ~
6 _- |- C4 E& |4 t8 U
template <class T>
( F( |7 i5 E( v2 Q8 o
bool LinkedStack<T>::isEmpty()
7 |- H7 @1 J( l7 \) f* g! |# P2 p
{
" W; J# i( L2 d/ w4 U( c/ E
return top == NULL;
5 F" i1 y1 ]/ x6 Y
}
9 S; M- t$ m+ f9 |& l2 J- r
. E2 \2 d' A- {) ]& g/ D% H
template <class T>
: P0 L6 T7 T% [7 R! p
void LinkedStack<T>::push(T x)
6 Q9 a& f4 p- m8 g+ n- u* S. i ?
{
( R5 p3 s# ~* {/ w+ A0 S
top = new Node<T>(x,top);
, `0 u: T2 n( C& I% {1 l; L
}
+ ~0 w) }6 H' }' U# x+ q s* C
) y: ?" z# d% ]- V
template <class T>
+ P* ^% a# u; |
T LinkedStack<T>::pop()
: e8 A- {) w; _
{
# J+ `! Z# Q& L! a! {% Q
if(!isEmpty())
. l7 h, S0 v3 F2 ?: M
{
! v6 `8 S; V- D1 C# K6 p1 j' b
T x = top->data;
+ Z+ q. U- d/ G5 A2 J; s
Node<T> *p = top;
4 c, \4 k. }2 B" J
top = top->next;
$ o* m7 k' L4 [/ p
delete p;
! B; f( `" ~+ w# d4 P+ w
return x;
; P l) c9 H# @ h+ V3 C& G
}
: J) V/ H: R% Y4 |
throw "空栈,不能执行出栈操作";
! g) s. s: {+ B; k/ X* @$ r
}
( d, K! y' w& P
: J% Q) x" ]7 F1 a, f
template <class T>
* H! N5 \$ U# Z" ~
T LinkedStack<T>::get()
# ?8 s* b! h( x; q2 }
{
' V! T) S6 i: Z3 m9 a
if(!isEmpty())
' ~9 r9 R2 n8 x6 I8 P0 R
{
$ r4 z" k& W0 V( q
return top->data;
7 J, L4 B: U4 q1 C) M: P
}
6 ?. A, \/ N: w: i* h, F
throw "空栈,不能获得栈顶元素";
4 Y* m3 Y, @/ P* q; L' d
}
, i, w1 h0 w p: i- U8 r, E
3 z$ }2 T1 u+ z9 M" |! p
char * toPostfix(char *expstr)
. d' E0 D4 p# H* T( ~" _
{
- c8 ^8 e( l" C$ A5 S
LinkedStack<char> stack;
) A. w1 t, G" o/ U
char *postfix = new char[strlen(expstr)*2];
9 q2 h& A- [) l( Q& k+ p! ~
int i=0;
% y& @$ W/ m. \6 r* }
int j=0;
( }" I& f7 Y; n0 K3 j; p
char out ;
- T& Z7 B( v' A: @, D* w
while(expstr[i]!='\0')
3 I. |& g, r9 @+ Q: p
{
: _; E- h+ \9 d' R3 v) T1 ~+ \
switch(expstr[i])
) _, {4 e* } Q/ N- ^3 Y" \
{
6 Y/ O+ t+ t( J/ d+ U
case'+':
* C8 x5 y8 r. o8 N7 R8 u. c' _7 Y
case'-':
1 M _$ U4 U$ h- Q( V5 C
while(!stack.isEmpty()&&stack.get()!='(')
5 _, V* I/ |' J. j" E, O& V: i
{
" j4 U& u! L; k) ^ N4 _5 a4 w
postfix[j++] = stack.pop();
G, |: ^3 M0 w
}
8 ^5 `$ u) A `. k- N
stack.push(expstr[i++]);
& K; M# j+ ^ k' y2 r
break;
# F; p( }+ ]9 ?5 U7 p% Q, Q
case'*':
/ g9 e4 B1 B# F/ E0 U" e/ @+ u8 O
case'/':
% o3 P. |3 P* Z1 m! C- @) V
while(!stack.isEmpty()&&(stack.get()=='*'||stack.get()=='/'))
! p j( g0 l: U5 {! V# `# k
{
* L/ U/ [6 }* P1 h7 h+ w
postfix[j++] = stack.pop();
5 Q+ o) p6 s4 _
}
/ A* j. j7 P+ d' o& Z
stack.push(expstr[i++]);
( S: Z6 m1 J. v3 s! K( U) d
break;
; M5 P6 f6 Q3 `4 g
case'(':stack.push(expstr[i++]);
0 ?6 [. o& \' Y: \
break;
+ o9 q+ T& ^3 A& h* ]
case')':out = stack.pop();
7 P" V2 \; ^3 ^. p) ^8 ?( w |
while(!stack.isEmpty()&&out!='(')
( X; z$ b {& Y U
{
% ]0 ?6 @4 C7 p. ~. U4 |
postfix[j++] = out;
* s9 S) S% M. u L* R# q" u" l
out = stack.pop();
" O% r1 F1 {* g7 u7 {$ j
}
( S2 [' H* m5 X5 b/ x4 r! b0 f
i++;
! Y& K) t2 `1 Q
break;
( j5 d8 F! A# v, D. @9 d, n3 q
default:
) `" V4 d2 X! ?9 k
while(expstr[i]>='0'&&expstr[i]<='9'&&expstr[i]!='\0')
: n/ Q% E8 Q) k; q) d9 N. c
{
) ~; j9 q. z9 @; m
postfix[j++] = expstr[i++];
! W7 y+ P6 V0 U% n5 u* ?0 q
}
3 N+ C& f; i! R* D4 G1 z
postfix[j++]=' ';
8 `0 Y' p. C6 l- d+ r! j
break;
7 z' h [+ Y- m/ m
}
. C/ `* e& i( ]' v
}
. X* I u ]$ j1 b* e
while(!stack.isEmpty())
8 j! U; K3 |6 Y% Y
{
4 o/ n% t! B* r7 J, r) m
postfix[j++]=stack.pop();
+ X- J6 M6 R% q' B6 I! e$ v
}
. }1 ^" T7 \ U! f: U5 R
postfix[j]='\0';
- K: H, p# d* T: x. d' q9 N0 j, d. t
return postfix;
: h2 m' B4 _* b
}
5 M1 ]! L g" J. {2 I
V) k$ m9 [% q" ~# S5 r8 l/ G( w8 k
int value(char *postfix)
- G. G% c P% T/ _
{
+ P8 _+ J+ Z- [1 P* a2 i( J8 B
LinkedStack<int> stack;
9 X! ?8 a( o; \6 ?& a$ c1 ?+ s
int i=0;
5 C6 g# B$ e$ M/ A1 D
int result = 0;
6 l) v5 T/ j& F
while(postfix[i]!='\0')
+ Z* o2 y5 u- S5 P+ Y8 t3 K" ?
{
% k0 v d( k9 n5 J) O Q* E
if(postfix[i]>='0'&&postfix[i]<='9')
$ I9 K0 l' a# A8 M- p
{
1 a& z4 t; V) t# E( U! i
result = 0;
) A2 f0 S$ \2 K+ v
while(postfix[i]!=' ')
% P, C7 ?; S% D1 d7 I" T; K" l
{
$ C' b% ]9 S6 i" X: k* s
result = result*10+postfix[i++]-'0';
; O" P3 k) g7 h, B+ L; l P3 }# K
}
- H; X0 @5 m$ s
i++;
$ o7 N: v. N% U* ~% z
stack.push(result);
" Y" ^0 w8 h8 z
}
/ w/ J7 r; v5 ~ j$ J
else
5 y- I, S2 i I: y4 X
{
+ g8 A; r9 O$ k* {2 r
if(postfix[i]!=' ')
( D/ s2 }) m: z+ W+ a8 j
{
0 Z3 x7 E, z6 R; L1 Z
int y = stack.pop();
j# Q, y2 ]- [, Q( [
int x = stack.pop();
( v/ T7 ]1 O1 [" P
switch(postfix[i])
' I7 S1 i# C, V
{
* Q: c/ L0 _6 O- ^* f9 R
case'+':result = x + y;
$ j; ^& R9 H7 S
break;
" r0 ]0 S: U8 Y5 r. q+ ?
case'-':result = x - y;
/ P# N( }: a: Z5 c
break;
8 \$ Z' v o. @4 g r/ N" n
case'*':result = x *y;
+ P% {5 t3 R$ y
break;
6 B, ^! j+ u. U3 s# s: E( ?! C
case'/':result = x / y;
$ b$ ^! ^$ B- x. x7 w+ d; Y5 Z( U
break;
( T* W% G; b2 r+ [1 {. T; X
}
$ w" Z* O3 d: t, |1 l" K2 \) `& q* p# y
stack.push(result);
: Y/ ]( |$ L- c/ a9 g
}
7 {' E6 M( m9 x0 e( X, `
i++;
; x0 x: h( z2 D6 d3 T' x/ o3 R9 r$ [3 [- Y
}
, v& [" Z( _. f# `) Y
}
2 g/ G" V y* q2 }+ o
return stack.pop();
5 y4 M" t0 {6 o( g
}
1 Z6 T* n$ ~+ b( J7 Z
) k5 H4 Y9 R+ w0 y. h
int main()
/ W, D# g+ r' d% j8 l
{
* |3 [- w3 E3 t/ u& o- t8 e
//char *expstr = "121+10*(52-49+20)/((35-25)*2+10)";
. e' |9 W) _% m* d2 C( k" {7 E) K
cout << "请输入表达式:";
2 h4 E- I0 a% z9 r7 _6 s
//char *a ;
( I! p( p( c% Q
//cin >> *a;
) P9 l9 D5 m! \1 L: Q# B
char expstr[20]={0};
. f% v; Q5 g* @$ [ j/ S: h
while(1)
% s6 e( x$ `( n9 _* d( ]8 v
{
2 ^% O }5 o6 K, n0 Z
cin>>expstr;
# @0 Z. i+ x. C6 C9 t
char *postfix = toPostfix(expstr);
8 c( @% u% G* P5 `7 R' a# U
cout << "expstr= "<<expstr << endl;
2 v2 \; x0 ]2 g) v7 z0 G+ X
cout << "postfix= "<<postfix<<endl;
& k/ x( N! F, U
cout << "value= "<<value(postfix) << endl;
s3 ~9 J/ a9 C% C3 V. ^) [1 _
}
" o: f. A: c. J# K. Q7 z3 y
return 0;
j8 G& }! C7 ~7 I: M- c8 L i
}
作者:
血腥的情人节
时间:
2016-6-23 11:24
caimicn 发表于 2016-3-31 10:14
8 s' g _$ x# U6 `
好了,找到第四种方法了
: ]3 Q+ ~6 u1 P! C' G
代入以下代码,得:11,9,4,2,1,6
滑稽~
) d2 p) R- k2 _0 c; k
( M9 C3 ?' Z! {( I
#include <iostream>
+ B1 T$ D* A i! D+ Y. O
#include <string.h>
& k7 y* s+ K+ [' H; C
using namespace std;
6 Y2 y+ p+ ?+ X! _- F9 l! _
template <class T>
8 a& m8 y/ Z7 O! `! ^! ]
class Node
! s4 g" N x- k1 h9 F
{
: D0 ~, T. H: j) r
public:
0 J7 R" ~. L; }1 [
T data;
1 \) s" W+ C- {, j
Node<T> *next;
& \! j( A, ^' O2 i6 X
Node()
$ V2 V4 j4 a) B5 {/ \% j- U6 b) r
{
; H5 w* s( g, I: F8 P
this->next = NULL;
2 Q& O4 l' l! o, i% F# [
}
4 e6 m/ R+ B a" D U0 v& `% J
Node(T data,Node<T> *next=NULL)
t" O/ s9 B5 y
{
( h. n5 w, Q& B& E3 L& i
this->data = data;
6 l& ^* H8 f n5 S3 }# |" f
this->next = next;
! F6 U' X& i4 k9 W" j$ B, y
}
2 B) A$ `! q( B: b1 X
};
4 x+ G! o) K! p [! |
1 B, D& p+ {, M
template <class T>
& U3 z8 z" ~; M& [# t- z
class LinkedStack
8 F' Z5 a) h- h; K0 O3 Y$ j8 \% R4 s
{
2 |8 u( Q7 @" c/ E6 a4 ^
private:
& A) i, ~: D, v' Y9 x/ P
Node<T> *top;
6 `. J V( K4 |3 E t
public:
/ y# |5 R; E7 Y* H3 i* ~( q3 K, o
LinkedStack();
, m- S) m$ x0 j( O! J- Z1 d% L
~LinkedStack();
- H. H# Y* \; V; N
bool isEmpty();
4 d% P$ n2 L0 N) ~* Q* C' ~
void push(T x);
& u( w* ~: p( o$ y% Q' |! e
T pop();
# ^ W+ x- Q' p" ^ A
T get();
% s; y0 w6 N1 e# H
};
1 \- e7 i6 D6 j; v2 M
) ~8 { q! ` c3 ^* c# |3 E4 ]
template <class T>
$ n% N9 d* O4 A9 z. y0 Q
LinkedStack<T>::LinkedStack()
! v$ M& W# C1 y5 Q% i
{
0 n) o& p- B; d
top = NULL;
; ~5 ?4 b4 R. V* B/ k
}
) i" z {5 ]& R M; k
7 |5 r! K: U8 X6 a
template <class T>
5 o+ `. K2 p5 P
LinkedStack<T>::~LinkedStack()
I) \! K, W# i$ \
{
: O& ~9 ~; _! R" I
Node<T> *p = top;
/ T6 |: @2 y) L0 ?9 J
Node<T> *q;
2 W4 k F( ~( g/ l X' i2 ]
while(p!=top)
- o8 R, Q# K( a6 o1 _# H5 j
{
s& Z7 B# l. u( C; ^6 U1 G3 p) y
q = p;
! k* D" n# P2 X2 d
p = p->next;
: x) j3 x0 a0 R; U* A+ C7 h8 E% h
delete p;
# i) M a6 o. B8 E" `0 y6 [/ z- {6 S
}
) z& z' B, R( t9 C ^5 w2 v
top = NULL;
7 H% s* s6 t5 @# A4 M" L
}
- Y, J7 i1 V2 A0 r; U; v8 W4 V4 T& L
7 b/ f/ p! b) [" h
template <class T>
5 e Y1 A( ~" F" x ]3 c: }
bool LinkedStack<T>::isEmpty()
& k+ w2 }7 u% w
{
1 R+ H1 }- @$ W O+ H
return top == NULL;
! O% f% L& S- _% w
}
$ ?+ J: E$ b; J( g* G
* K- E$ A) \7 S' S1 q( C
template <class T>
. h' K3 q- V! @$ W8 Z7 n" D2 G
void LinkedStack<T>::push(T x)
0 |3 y& a$ f0 u: n6 z( ]7 a6 t
{
& w" _0 c; u: L; ~- D5 E
top = new Node<T>(x,top);
* e( \6 k9 c7 x8 L- z
}
$ C! o4 _( |1 s' e8 O# Z
# ^" w: P( i+ ^% c0 x1 a; {
template <class T>
7 F3 C" K. d; ]" }+ y. k0 ]0 A
T LinkedStack<T>::pop()
+ c _- r4 s" D+ b4 N& c
{
: a V7 H6 d4 L& k" G
if(!isEmpty())
3 {* i$ v% Y9 @* G# j
{
* s$ x% v% D; x
T x = top->data;
$ s H6 @$ s% u: ]+ J/ a
Node<T> *p = top;
. k, x: V( l2 ^% t7 f/ @9 w
top = top->next;
& @- S: G, ^7 M7 t, n
delete p;
1 x0 p8 R8 N- j& l% A& ]8 e; h
return x;
, j( c* _1 \" I" {7 j. }* F1 W
}
0 A7 }/ I% t4 n O6 j7 @' ?
throw "空栈,不能执行出栈操作";
9 m! [; f0 l5 M& a5 I/ [' e( R
}
* ~; m4 i; d1 _: X2 Y; H; J: l; K- v
4 g" Y& _8 ? O' M1 h8 N: j. I
template <class T>
: ^# S2 W$ [, N; K* M
T LinkedStack<T>::get()
1 a8 T# @* a( X$ r3 W& U
{
' L0 \+ t8 k7 \, g
if(!isEmpty())
3 E! ?+ s. c' R% T4 C
{
/ y) `- s5 g# d) S% }& g1 k
return top->data;
7 b( o, O4 g, T0 _
}
7 Z; \! y& D6 ?: Y1 Y1 ?( k0 u
throw "空栈,不能获得栈顶元素";
4 T1 e# }7 D7 I( j/ [. i
}
* j: c# h8 b) q q0 a8 J8 o
. q& [6 f& l! G3 n! @/ V" N8 C
char * toPostfix(char *expstr)
9 d3 x! f f# p k: U) ~* S- R" F
{
) b4 M2 d# M! m. _8 E: V$ |
LinkedStack<char> stack;
* z l! P$ Q6 H& F% q$ n( g
char *postfix = new char[strlen(expstr)*2];
3 G& L3 E |0 b" {$ q; a8 C
int i=0;
& `& O! }4 j; W* e7 g* D8 Y
int j=0;
: w. u- h* r( K# D$ H1 k( \1 e
char out ;
( ^4 Z" \* N9 v, D4 }7 m4 k s
while(expstr
!='\0')
( J! z* l/ \6 ]4 n
{
/ M6 ?7 s& F# b4 T8 d |
switch(expstr
)
9 G7 g7 h$ x- L7 }& G
{
3 u$ t3 j R3 w9 ?8 j* v' O
case'+':
5 k0 s8 O& e# w* }8 x
case'-':
0 m# R3 o8 b% d l1 v5 m
while(!stack.isEmpty()&&stack.get()!='(')
5 r2 `& E7 Z9 y
{
% W* q6 C! Q$ h* E9 v
postfix[j++] = stack.pop();
. a9 [$ Q T2 Z8 n4 n _6 J
}
0 X! M2 X' |1 n L. f/ S
stack.push(expstr[i++]);
, Y; k ^% s% T+ p
break;
1 f: `2 q3 U9 g
case'*':
! @( M( {& ]# E! y: {# z( i4 @
case'/':
7 @0 P. T7 q. D5 ~
while(!stack.isEmpty()&&(stack.get()=='*'||stack.get()=='/'))
+ M; z$ r3 B' w* t0 p0 G
{
; j8 o0 Q6 f! b5 D. ?0 {2 \2 B4 @
postfix[j++] = stack.pop();
# M2 V# L# M* k2 {; q
}
/ S" q& m0 ?4 H1 x1 u
stack.push(expstr[i++]);
$ ^- L. @/ S% x! P: W9 u p" ^
break;
& ]% |/ _! P/ g2 t4 M
case'(':stack.push(expstr[i++]);
! ~3 ~$ j* F. H6 B
break;
" R( I7 G$ ]8 X
case')':out = stack.pop();
$ k7 u/ n. y# b* E: M7 S
while(!stack.isEmpty()&&out!='(')
* t! j) T, h% V8 g( e
{
9 g9 y* T: }: {
postfix[j++] = out;
6 R8 L7 K1 c I1 E+ t2 Q4 \
out = stack.pop();
% `" ~) Z6 M5 z6 t4 Q% D J* }
}
8 t; p6 Y w8 M l$ f
i++;
7 W1 Z% Y7 w1 _ H: G( d# @
break;
( w& b' H( y. t. }0 P: X1 a5 l% K
default:
5 M0 L" a- v f: U9 z
while(expstr
>='0'&&expstr
<='9'&&expstr
!='\0')
) ]% d! x8 O# Y& S! [
{
1 C- F' `0 F0 e
postfix[j++] = expstr[i++];
4 P1 k- W8 o5 H7 v9 V( g
}
7 [) B9 Q5 ~2 z$ C& M; E9 @* l
postfix[j++]=' ';
: m" p/ a0 C( |) w3 h% |, E: l+ q; X& z
break;
- h ?1 i8 R5 j. S+ B- p% v4 G
}
4 P- U/ E P! v1 X8 P
}
6 r. v9 W W& c5 Y
while(!stack.isEmpty())
4 I7 j* D# l5 L) i' k: B& [) |
{
: [5 S1 R: G- I2 O$ B
postfix[j++]=stack.pop();
. u- K: H$ q3 L; g8 I$ r& P6 y
}
- g/ Z" e; O7 a
postfix[j]='\0';
+ X8 V5 ~+ q: k$ f* f& O, I* {/ |" a
return postfix;
- E) t. C- L) F, C0 \2 s4 g7 W+ w
}
+ q) l' l( V$ ~- m! h# D% x
/ U( u5 Q! ~& v$ B. e1 |
int value(char *postfix)
9 h$ U- ~; o4 O/ {8 o7 x: l# L' C
{
9 L" U: L1 Q M4 g. F3 `: }
LinkedStack<int> stack;
4 e3 v7 G( x" ?: b: S
int i=0;
* J4 a5 A6 I8 f& K& \8 T" t- U" F& \
int result = 0;
4 x. [1 e7 R* | X* F( g
while(postfix
!='\0')
; o& |" g2 p/ p
{
3 u- ?( d$ ?% X3 |1 z
if(postfix
>='0'&&postfix
<='9')
3 M7 Q0 R& G0 e% }& }9 z
{
/ l7 x3 W+ _+ e; _6 x6 l3 M
result = 0;
/ n4 a8 p/ K% R* ?& }& E5 ]9 ]. T
while(postfix
!=' ')
4 O( W- G! a. o
{
/ v' Z, Z- _* b
result = result*10+postfix[i++]-'0';
) `9 O0 x$ t% a9 q( ]+ b* r+ K
}
, L# W( {1 u2 j
i++;
4 d' U8 s$ X7 u
stack.push(result);
* a! _0 R# H: K! Y
}
' |3 R8 z! w0 q! k
else
4 w/ l' m6 }5 j. k' x+ t) R1 E( S* e
{
. W# q. o' G. o' w+ _) z
if(postfix
!=' ')
$ r0 I c' V9 T* f! |- h
{
7 A0 V4 j1 d- X! C! p- _7 q
int y = stack.pop();
: P# I$ o! N1 K2 B! V" v
int x = stack.pop();
' H! W/ J# i+ r. } I
switch(postfix
)
7 z# c, ~8 b) @7 S5 @8 l0 y3 g# ^. ?
{
# E- K0 ?2 Z/ W9 [% V& [0 D8 ~
case'+':result = x + y;
6 V. ]( P C7 p3 i3 r; {6 e
break;
" g# s. K# ^' h; T- f6 A$ W( c
case'-':result = x - y;
: P6 K, p2 c: j5 y: Y
break;
O& f/ U1 I: A7 ?
case'*':result = x *y;
# q3 K4 @4 a4 b( o: l* i
break;
# {- q$ B) p( x( r
case'/':result = x / y;
6 A' R4 O* R. E* K* T! c. k! N; J
break;
" s; ^+ k% M* \% f+ V- v. ?% O4 `
}
' [8 @8 E6 ]' W2 ?3 _3 g9 U) K9 `
stack.push(result);
- @5 O; i- T+ r
}
" _. P. I$ x- s
i++;
O, s9 L$ _3 W$ x# s1 u- U. @
}
+ g4 [2 _8 k. u1 j% I; E
}
% `. u) @2 C0 b
return stack.pop();
& l' L; O0 T8 n* L
}
8 Z( Y) P8 {) c) ]' P' ~
$ l8 e* L6 g: ~; m u
int main()
4 d3 Z8 z* e; B4 |8 n t
{
A, E0 q X2 a
//char *expstr = "121+10*(52-49+20)/((35-25)*2+10)";
" P! Y5 _) r: U: e9 ~
cout << "请输入表达式:";
- X5 l+ g" L4 u% }& c
//char *a ;
r ?/ J0 {! ^- T6 ?
//cin >> *a;
+ ]* I! w$ Z4 W5 d" }* V
char expstr[20]={0};
! e$ c+ M5 x7 B8 j0 y' `
while(1)
. t5 X. Y6 D+ P! n7 y2 `
{
+ v& z/ \- ]8 k4 s
cin>>expstr;
! s6 w! k0 `* v" Y- z8 s7 d
char *postfix = toPostfix(expstr);
) u0 S: m7 Q. c: |& `; Y9 t. |
cout << "expstr= "<<expstr << endl;
8 T+ X1 v! g1 b. z* l& y
cout << "postfix= "<<postfix<<endl;
: S1 s1 `# P0 q! _% N
cout << "value= "<<value(postfix) << endl;
$ w8 M6 O6 g u6 G- A j8 J
}
- U, ~9 b+ J- w& n/ n a
return 0;
/ ^- N- n# z4 K: z. k
}
欢迎光临 冒险解谜游戏中文网 ChinaAVG (https://chinaavg.com/)
Powered by Discuz! X3.2