-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathC语言 实现逆置功能.html
153 lines (153 loc) · 16.7 KB
/
C语言 实现逆置功能.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
<h1 style="text-align: center;">C语言 实现逆置功能</h1>
<p>//凯鲁嘎吉 - 博客园 <em id="__mceDel">http://www.cnblogs.com/kailugaji/</em></p>
<h2>1. 字符串的逆置</h2>
<h3>方法1：利用数组</h3>
<div class="cnblogs_code">
<pre><span style="color: #008080;"> 1</span> #include<stdio.h>
<span style="color: #008080;"> 2</span> #include<<span style="color: #0000ff;">string</span>.h>
<span style="color: #008080;"> 3</span> <span style="color: #0000ff;">void</span> fun(<span style="color: #0000ff;">char</span><span style="color: #000000;"> a[]){
</span><span style="color: #008080;"> 4</span> <span style="color: #0000ff;">int</span><span style="color: #000000;"> i,len;
</span><span style="color: #008080;"> 5</span> <span style="color: #0000ff;">char</span><span style="color: #000000;"> ch;
</span><span style="color: #008080;"> 6</span> len=<span style="color: #000000;">strlen(a);
</span><span style="color: #008080;"> 7</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<len/<span style="color: #800080;">2</span>;i++<span style="color: #000000;">){
</span><span style="color: #008080;"> 8</span> ch=<span style="color: #000000;">a[i];
</span><span style="color: #008080;"> 9</span> a[i]=a[len-<span style="color: #800080;">1</span>-<span style="color: #000000;">i];
</span><span style="color: #008080;">10</span> a[len-<span style="color: #800080;">1</span>-i]=<span style="color: #000000;">ch;
</span><span style="color: #008080;">11</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">12</span> <span style="color: #000000;">}
</span><span style="color: #008080;">13</span>
<span style="color: #008080;">14</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> main(){
</span><span style="color: #008080;">15</span> <span style="color: #0000ff;">char</span> s[<span style="color: #800080;">10</span><span style="color: #000000;">];
</span><span style="color: #008080;">16</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">Pealse input a string:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">17</span> <span style="color: #000000;"> gets(s);
</span><span style="color: #008080;">18</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">The string has been inverted:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">19</span> <span style="color: #000000;"> fun(s);
</span><span style="color: #008080;">20</span> <span style="color: #000000;"> puts(s);
</span><span style="color: #008080;">21</span> }</pre>
</div>
<p>结果为：</p>
<p><img src="https://images2018.cnblogs.com/blog/1027447/201803/1027447-20180317174537179-2126361334.png" alt="" /></p>
<h3>方法2：利用指针</h3>
<div class="cnblogs_code">
<pre><span style="color: #008080;"> 1</span> #include<stdio.h>
<span style="color: #008080;"> 2</span> #include<<span style="color: #0000ff;">string</span>.h>
<span style="color: #008080;"> 3</span> <span style="color: #0000ff;">void</span> fun(<span style="color: #0000ff;">char</span> *<span style="color: #000000;">a){
</span><span style="color: #008080;"> 4</span> <span style="color: #0000ff;">if</span>(*<span style="color: #000000;">a){
</span><span style="color: #008080;"> 5</span> fun(a+<span style="color: #800080;">1</span><span style="color: #000000;">);
</span><span style="color: #008080;"> 6</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">%c</span><span style="color: #800000;">"</span>,*<span style="color: #000000;">a);
</span><span style="color: #008080;"> 7</span> <span style="color: #000000;"> }
</span><span style="color: #008080;"> 8</span> <span style="color: #000000;">}
</span><span style="color: #008080;"> 9</span>
<span style="color: #008080;">10</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> main(){
</span><span style="color: #008080;">11</span> <span style="color: #0000ff;">char</span> s[<span style="color: #800080;">10</span><span style="color: #000000;">];
</span><span style="color: #008080;">12</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">Pealse input a string:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">13</span> <span style="color: #000000;"> gets(s);
</span><span style="color: #008080;">14</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">The string has been inverted:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">15</span> <span style="color: #000000;"> fun(s);
</span><span style="color: #008080;">16</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">17</span> }</pre>
</div>
<p>结果为：</p>
<p><img src="https://images2018.cnblogs.com/blog/1027447/201803/1027447-20180317172137570-1184483048.png" alt="" /></p>
<h2>2.输入10个数，逆置输出</h2>
<h3>方法1：利用数组</h3>
<div class="cnblogs_code">
<pre><span style="color: #008080;"> 1</span> #include<stdio.h>
<span style="color: #008080;"> 2</span> #include<<span style="color: #0000ff;">string</span>.h>
<span style="color: #008080;"> 3</span> <span style="color: #0000ff;">#define</span> N 10
<span style="color: #008080;"> 4</span>
<span style="color: #008080;"> 5</span> <span style="color: #0000ff;">#if</span>(1)
<span style="color: #008080;"> 6</span> <span style="color: #0000ff;">void</span> reverse(<span style="color: #0000ff;">int</span> x[],<span style="color: #0000ff;">int</span><span style="color: #000000;"> n){
</span><span style="color: #008080;"> 7</span> <span style="color: #0000ff;">int</span><span style="color: #000000;"> i,j,temp,m;
</span><span style="color: #008080;"> 8</span> m=(n-<span style="color: #800080;">1</span>)/<span style="color: #800080;">2</span><span style="color: #000000;">;
</span><span style="color: #008080;"> 9</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<=m;i++<span style="color: #000000;">){
</span><span style="color: #008080;">10</span> j=n-<span style="color: #800080;">1</span>-<span style="color: #000000;">i;
</span><span style="color: #008080;">11</span> temp=<span style="color: #000000;">x[i];
</span><span style="color: #008080;">12</span> x[i]=<span style="color: #000000;">x[j];
</span><span style="color: #008080;">13</span> x[j]=<span style="color: #000000;">temp;
</span><span style="color: #008080;">14</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">15</span> <span style="color: #000000;">}
</span><span style="color: #008080;">16</span> <span style="color: #0000ff;">#endif</span>
<span style="color: #008080;">17</span>
<span style="color: #008080;">18</span> <span style="color: #0000ff;">#if</span>(0)
<span style="color: #008080;">19</span> <span style="color: #0000ff;">void</span> reverse(<span style="color: #0000ff;">int</span> *x,<span style="color: #0000ff;">int</span><span style="color: #000000;"> n){
</span><span style="color: #008080;">20</span> <span style="color: #0000ff;">int</span> *i,*j,*<span style="color: #000000;">p,temp,m;
</span><span style="color: #008080;">21</span> m=(n-<span style="color: #800080;">1</span>)/<span style="color: #800080;">2</span><span style="color: #000000;">;
</span><span style="color: #008080;">22</span> i=x; <span style="color: #008000;">//</span><span style="color: #008000;">i->x[0]</span>
<span style="color: #008080;">23</span> j=x+n-<span style="color: #800080;">1</span>; <span style="color: #008000;">//</span><span style="color: #008000;">j->x[n-1]</span>
<span style="color: #008080;">24</span> p=x+m; <span style="color: #008000;">//</span><span style="color: #008000;">p->x[m]</span>
<span style="color: #008080;">25</span> <span style="color: #0000ff;">for</span>(;i<=p;i++,j--<span style="color: #000000;">){
</span><span style="color: #008080;">26</span> temp=*<span style="color: #000000;">i;
</span><span style="color: #008080;">27</span> *i=*<span style="color: #000000;">j;
</span><span style="color: #008080;">28</span> *j=<span style="color: #000000;">temp;
</span><span style="color: #008080;">29</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">30</span> <span style="color: #000000;">}
</span><span style="color: #008080;">31</span> <span style="color: #0000ff;">#endif</span>
<span style="color: #008080;">32</span>
<span style="color: #008080;">33</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> main(){
</span><span style="color: #008080;">34</span> <span style="color: #0000ff;">int</span><span style="color: #000000;"> i,a[N];
</span><span style="color: #008080;">35</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">Pealse input %d numbers:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">,N);
</span><span style="color: #008080;">36</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<N;i++<span style="color: #000000;">){
</span><span style="color: #008080;">37</span> scanf(<span style="color: #800000;">"</span><span style="color: #800000;">%d</span><span style="color: #800000;">"</span>,a+<span style="color: #000000;">i);
</span><span style="color: #008080;">38</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">39</span> <span style="color: #000000;"> reverse(a,N);
</span><span style="color: #008080;">40</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">The array has been inverted:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">41</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<N;i++<span style="color: #000000;">){
</span><span style="color: #008080;">42</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">%2d</span><span style="color: #800000;">"</span><span style="color: #000000;">,a[i]);
</span><span style="color: #008080;">43</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">44</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">45</span> }</pre>
</div>
<p>结果为：</p>
<p><img src="https://images2018.cnblogs.com/blog/1027447/201803/1027447-20180317173546720-1204819688.png" alt="" /></p>
<h3>方法2：利用指针</h3>
<div class="cnblogs_code">
<pre><span style="color: #008080;"> 1</span> #include<stdio.h>
<span style="color: #008080;"> 2</span> #include<<span style="color: #0000ff;">string</span>.h>
<span style="color: #008080;"> 3</span> <span style="color: #0000ff;">#define</span> N 10
<span style="color: #008080;"> 4</span>
<span style="color: #008080;"> 5</span> <span style="color: #0000ff;">#if</span>(0)
<span style="color: #008080;"> 6</span> <span style="color: #0000ff;">void</span> reverse(<span style="color: #0000ff;">int</span> x[],<span style="color: #0000ff;">int</span><span style="color: #000000;"> n){
</span><span style="color: #008080;"> 7</span> <span style="color: #0000ff;">int</span><span style="color: #000000;"> i,j,temp,m;
</span><span style="color: #008080;"> 8</span> m=(n-<span style="color: #800080;">1</span>)/<span style="color: #800080;">2</span><span style="color: #000000;">;
</span><span style="color: #008080;"> 9</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<=m;i++<span style="color: #000000;">){
</span><span style="color: #008080;">10</span> j=n-<span style="color: #800080;">1</span>-<span style="color: #000000;">i;
</span><span style="color: #008080;">11</span> temp=<span style="color: #000000;">x[i];
</span><span style="color: #008080;">12</span> x[i]=<span style="color: #000000;">x[j];
</span><span style="color: #008080;">13</span> x[j]=<span style="color: #000000;">temp;
</span><span style="color: #008080;">14</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">15</span> <span style="color: #000000;">}
</span><span style="color: #008080;">16</span> <span style="color: #0000ff;">#endif</span>
<span style="color: #008080;">17</span>
<span style="color: #008080;">18</span> <span style="color: #0000ff;">#if</span>(1)
<span style="color: #008080;">19</span> <span style="color: #0000ff;">void</span> reverse(<span style="color: #0000ff;">int</span> *x,<span style="color: #0000ff;">int</span><span style="color: #000000;"> n){
</span><span style="color: #008080;">20</span> <span style="color: #0000ff;">int</span> *i,*j,*<span style="color: #000000;">p,temp,m;
</span><span style="color: #008080;">21</span> m=(n-<span style="color: #800080;">1</span>)/<span style="color: #800080;">2</span><span style="color: #000000;">;
</span><span style="color: #008080;">22</span> i=x; <span style="color: #008000;">//</span><span style="color: #008000;">i->x[0]</span>
<span style="color: #008080;">23</span> j=x+n-<span style="color: #800080;">1</span>; <span style="color: #008000;">//</span><span style="color: #008000;">j->x[n-1]</span>
<span style="color: #008080;">24</span> p=x+m; <span style="color: #008000;">//</span><span style="color: #008000;">p->x[m]</span>
<span style="color: #008080;">25</span> <span style="color: #0000ff;">for</span>(;i<=p;i++,j--<span style="color: #000000;">){
</span><span style="color: #008080;">26</span> temp=*<span style="color: #000000;">i;
</span><span style="color: #008080;">27</span> *i=*<span style="color: #000000;">j;
</span><span style="color: #008080;">28</span> *j=<span style="color: #000000;">temp;
</span><span style="color: #008080;">29</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">30</span> <span style="color: #000000;">}
</span><span style="color: #008080;">31</span> <span style="color: #0000ff;">#endif</span>
<span style="color: #008080;">32</span>
<span style="color: #008080;">33</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> main(){
</span><span style="color: #008080;">34</span> <span style="color: #0000ff;">int</span><span style="color: #000000;"> i,a[N];
</span><span style="color: #008080;">35</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">Pealse input %d numbers:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">,N);
</span><span style="color: #008080;">36</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<N;i++<span style="color: #000000;">){
</span><span style="color: #008080;">37</span> scanf(<span style="color: #800000;">"</span><span style="color: #800000;">%d</span><span style="color: #800000;">"</span>,a+<span style="color: #000000;">i);
</span><span style="color: #008080;">38</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">39</span> <span style="color: #000000;"> reverse(a,N);
</span><span style="color: #008080;">40</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">The array has been inverted:\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">41</span> <span style="color: #0000ff;">for</span>(i=<span style="color: #800080;">0</span>;i<N;i++<span style="color: #000000;">){
</span><span style="color: #008080;">42</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">%2d</span><span style="color: #800000;">"</span><span style="color: #000000;">,a[i]);
</span><span style="color: #008080;">43</span> <span style="color: #000000;"> }
</span><span style="color: #008080;">44</span> printf(<span style="color: #800000;">"</span><span style="color: #800000;">\n</span><span style="color: #800000;">"</span><span style="color: #000000;">);
</span><span style="color: #008080;">45</span> }</pre>
</div>
<p>结果为：</p>
<p><img src="https://images2018.cnblogs.com/blog/1027447/201803/1027447-20180317173742061-380065509.png" alt="" /></p>
<p> </p>