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第八周实践项目3—顺序串算法

2015-11-30 19:35 253 查看
/*
Copyright (c)2015,烟台大学计算机与控制工程学院
All rights reserved.
文件名称:项目3.cbp
作 者:刘晨筱
完成日期:2015年11月30日
版 本 号:v1.0

问题描述:采用顺序存储方式存储串,实现下列算法并测试。
输入描述:无
程序输出:测试数据
*/
头文件代码详情见【顺序串算法库

(1)试编写算法实现将字符串S中所有值为c1的字符换成值为c2的字符: void Trans(SqString *&s, char c1, char c2); 

代码:
#include "sqstring.h"

void Trans(SqString &s, char c1, char c2)
{
int i;
for (i=0; i<s.length; i++)
if (s.data[i]==c1)
s.data[i]=c2;
}

int main()
{
SqString s;
StrAssign(s, "messages");
Trans(s, 'e', 'a');
DispStr(s);
return 0;
}
运行结果:
<img src="https://img-blog.csdn.net/20151130194919272" alt="" />
<p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;">(2)试编写算法,实现将已知字符串所有字符倒过来重新排列。如ABCDEF改为FEDCBA。 
void Invert(SqString &s) </p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;">代码:</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;"><pre name="code" class="cpp">#include "sqstring.h"

void Invert(SqString &s)
{
int i;
char temp;
for (i=0; i<s.length/2; i++)
{
temp = s.data[i];
s.data[i]=s.data[s.length-i-1];
s.data[s.length-i-1] = temp;
}
}

int main()
{
SqString s;
StrAssign(s, "abcdefg");
Invert(s);
DispStr(s);
return 0;
}
运行结果:
<img src="https://img-blog.csdn.net/20151130194855390" alt="" />
<p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;">(3)从串s中删除其值等于c的所有字符。如从message中删除’e’,得到的是mssag。 
void DellChar(SqString &s, char c) </p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;">代码:</p><pre name="code" class="cpp">#include "sqstring.h"

void DellChar(SqString &s, char c)
{
int k=0, i=0;   //k记录值等于c的字符个数
while(i<s.length)
{
if(s.data[i]==c)
k++;
else
s.data[i-k]=s.data[i];
i++;
}
s.length -= k;
}

int main()
{
SqString s;
StrAssign(s, "message");
DellChar(s, 'e');
DispStr(s);
return 0;
}


运行结果:

<img src="https://img-blog.csdn.net/20151130194722930" alt="" />
<p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;">(4)有两个串s1和s2,设计一个算法求一个这样的串,该串中的字符是s1和s2中公共字符。所谓公共子串,是由在s1中有,且在s2中也有的字符构成的字符。例s1为”message”,s2为”agent”,得到的公共子串是”eage”。 
SqString CommChar(SqString s1,SqString s2);</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(85, 85, 85); font-family: 'microsoft yahei'; font-size: 15.454545021057129px; line-height: 35px;">代码:</p><pre name="code" class="cpp">#include "sqstring.h"

SqString CommChar(SqString s1,SqString s2)
{
SqString s3;
int i,j,k=0;
for (i=0; i<s1.length; i++)
{
for (j=0; j<s2.length; j++)
if (s2.data[j]==s1.data[i])
break;
if (j<s2.length)            //s1.data[i]是公共字符
{
s3.data[k]=s1.data[i];
k++;
}
}
s3.length=k;
return s3;
}

int main()
{
SqString s1, s2, s;
StrAssign(s1, "message");
StrAssign(s2, "agent");
s = CommChar(s1, s2);
DispStr(s);
return 0;
}
运行结果:
<img src="https://img-blog.csdn.net/20151130194659768" alt="" />




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