c语言：定长顺序串的基本操作实实现

// 串的定长顺序存储实现.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include<iostream>#include<stdio.h>#include<string>#include<iomanip>#define STRING_SIZE 255using namespace std;typedef unsigned char SString[STRING_SIZE + 1];//函数声明部分void Error(char *s);                                 //错误处理函数void Strassign_string(SString &S, char chars[]);     //赋值函数void Clear_string(SString &s);                       //清空函数void Destroy_string(SString &S);                     //销毁函数int Getlength_string(SString &s);                    //得到定长顺序串的长度int Compare_string(SString &s, SString &t);          //比较两个订场顺序串的大小void Concat_string(SString &t, SString &s1, SString &s2); //连接两个顺序串void Substring_string(SString &sub, SString &s, int pos, int len); //得到主串的子串void Insert_string(SString &S, SString &T, int pos);   //插入函数void Delete_string(SString &S, int t, int pos);        //删除函数//函数实现部分void Error(char *s)                                 //错误处理函数{cout << s << endl;exit(1);}/*赋值算法设计：1、先计算待赋值顺序串的长度；2.如果待赋值字符串的长度为0，则将主串设置为空串3.在待赋值字符串长度不为零的情况下，如果长度大于申请的空间，将发生截断现象，给出截断提示如果长度小于等于申请的空间，不发生截断现象*/void Strassign_string(SString &S, char chars[])    //赋值函数{int i = 0;int chars_length = 0;     //初始值设为0while (chars[i] != '\0')  //计算待赋值串的长度{chars_length++;     i++;}if (!chars_length)   S[0] = 0;else{int j = 1;int k = 0;if (chars_length > STRING_SIZE){while(j<=STRING_SIZE){S[j++] = chars[k++];}S[0] = STRING_SIZE;cout << "串常量长度大于给定空间，赋值发生截断！" << endl;}else{while (j <= chars_length){S[j++] = chars[k++];}S[0] = chars_length;}}}void Clear_string(SString &s)                     //清空函数{s[0] = 0;}void Destroy_string(SString &S)                    //销毁函数{for (int i = 1; i <= S[0]; i++){delete &S[i];}delete &S[0];}int Getlength_string(SString &s)                    //得到定长顺序串的长度{return s[0];}/*定长顺序串的大小比较算法设计:以此比较串1和串1对应位置上的字符1.如果串1大于串2，返回正数；2.如果串1等于串2，返回0；3,如果串1小于串2，返回负数*/int Compare_string(SString &s, SString &t)          //比较两个定长顺序串的大小{for (int i = 1; (i <= s[0]) && (i <= t[0]); i++){if (s[i] != t[i])return (s[i] - t[i]);elsereturn (s[0] - t[0]);}}/*连接两个定长顺序串的算法设计：基于定产顺序串S1和S2的连接操作，对超过预定义空间的部分需要实施截断操作。基于S1和s2长度的不同，连接时可能有以下四种情况：1.S1[0]+S2[0]<=STRING_SIZE,则得到的串是正确的串；2.S1[0]+S2[0]>STRING_SIZE,且S1[0]<STRING_SIZE,则得到的串是S1的全串，S2的部分，S2将发生截断；3.S1[0]=STRING_SIZE,则得到的串是S1串；4.S1[0]>STRING_SIZE,则得到的串是S1的部分，S1将发生截断；*/void Concat_string(SString &t, SString &s1, SString &s2)//连接两个顺序串{if ((s1[0] + s1[0]) <= STRING_SIZE){int j = 1;int k = 1;while (j <= s1[0]){t[k++] = s1[j++];}j = 1;while (j <= s2[0]){t[k++] = s2[j++];}t[0] = s1[0] + s2[0];cout << "正确连接，没有发生截断！" << endl;}else if ((s1[0]) <= STRING_SIZE){int j = 1;int k = 1;while (j <= s1[0]){t[k++] = s1[j++];}j = 1;while (j <= s2[0]){t[k++] = s1[j++];}t[0] = STRING_SIZE;cout << "未正确连接，S2发生截断！" << endl;}else if ((s1[0])== STRING_SIZE){int j = 1;int k = 1;while (j <= s1[0]){t[k++] = s1[j++];}t[0] = STRING_SIZE;cout << "未正确连接，S2没有连接上！" << endl;}else {int j = 1;int k = 1;while (j <= s1[0]){t[k++] = s1[j++];}t[0] = s1[0];cout << "未正确连接，S1发生截断现象！" << endl;}}void Substring_string(SString &sub, SString &s, int pos, int len) //得到主串的子串{if ((pos<1) || (pos>s[0]) || (len < 0) || (len>(s[0] - pos + 1)))Error("参数输入错误，请再次输入！");for (int i = 1; i <= len; i++){sub[i] = s[pos + i - 1];}sub[0] = len;}void Insert_string(SString &S, SString &T, int pos)//将子串插入到主串pos位置后{if ((S[0] + T[0]) <= STRING_SIZE){int j = 0;for (int i = (S[0]+T[0]); i >= pos; i--) //将主串从后往前移动，腾出子串的位置{   S[i] = S[S[0] - j];j++;}j = 1;for (int i = pos; i < (pos + T[0]); i++)  //将子串插入到pos位置起的部分{S[i] = T[j];j++;}S[0] = S[0] + T[0];}} void Delete_string(SString &S, int t, int pos)  //从主串中pos位置起删除t个字符{    for (int i = pos; i < (S[0] - pos + 1); i++){S[i] = S[i+t];}S[0] = S[0] - t;}int _tmain(int argc, _TCHAR* argv[]){char a[50] = { "abc" };SString S1;Strassign_string(S1, a);cout << "串S1的长度是：" << Getlength_string(S1) << endl;char b[50] = { "ABCDEFGHIJKLMN"};SString S2;Strassign_string(S2, b);cout << "串S2的长度是：" << Getlength_string(S2) << endl;cout << "比较字符串的结果是：" << Compare_string(S1, S2) << endl;Insert_string(S2, S1, 3);cout << "插入后的字符串是：";for (int i = 1; i <= S2[0]; i++){cout << S2[i];}cout << endl;Delete_string(S2, 3, 2);cout << "删除后的字符串是：";for (int i = 1; i <= S2[0]; i++){cout << S2[i];}cout << endl; SString S3;Concat_string(S3, S1, S2);cout<<"连接后的字符串长度是：" << Getlength_string(S3) << endl;cout << "连接后的字符串是：";for (int i = 1; i <= S3[0]; i++){cout << S3[i];}cout << endl;SString S4;Substring_string(S4, S3, 3, 5);cout << "取出的子串是：";for (int i = 1; i <= S4[0]; i++){cout << S4[i];}cout << endl;return 0;}