/**
*
* Althor: Hacker Hao
* Create: 2023.10.14
*
*/
#include <bits/stdc++.h>
using namespace std;
#define MAXSIZE 200
#define ERROR -1
#define OK 1
typedef struct
{
char data[MAXSIZE];
int length;
}SqString;
//实现串赋值、串比较、求串长、串联接以及求子串这5种基本操作。
void Assign(SqString &s, char str[])
{
int i = 0;
for (i = 0; str[i] != '\0'; i++)
s.data[i] = str[i];
s.length = i;
}
void Compare(SqString *s1, SqString *s2)
{
int i = 0;
for (i = 0; s1->data[i] != '\0' && s2->data[i] != '\0'; i++)
{
if (s1->data[i] > s2->data[i])
{
cout << "前者大" << endl;
return;
}
if (s1->data[i] < s2->data[i])
{
cout << "后者大" << endl;
return;
}
}
cout << "一样大" << endl;
return;
}
int Length(SqString* s)
{
return s->length;
}
void Concat(SqString* s1, SqString* s2, SqString* s)
{
int t = 0;
if (s1->length + s2->length <= MAXSIZE)
{
for (int i = 0; i < s1->length; i++)
{
s->data[i] = s1->data[i];
}
for (int i = 0, j = s1->length; j < s1->length + s2->length; i++, j++)
{
s->data[j] = s2->data[i];
}
s->length = s1->length + s2->length;
t = s->length;
}
else
{
for (int i = 0; i < s1->length; i++)
{
s->data[i] = s1->data[i];
}
for (int i = 0, j = s1->length; i< MAXSIZE - s1->length; i++, j++)
{
s->data[j] = s2->data[i];
}
t = MAXSIZE;
}
cout << "新的链接好的串为:" << endl;
for (int i = 0; i < t; i++)
{
cout << s->data[i];
}
cout << endl;
}
int SubString(SqString &Sub, SqString s, int pos, int len)
{
if (pos < 1 || pos > s.length || len < 0 || len > s.length - pos + 1)
return ERROR;
for (int i = 0; i < len; i++,pos++)
{
Sub.data[i] = s.data[pos];
}
Sub.length = len;
for (int i = 0; i < len; i++)
{
cout << Sub.data[i];
}
cout << endl;
return OK;
}
int main()
{
cin.tie(0), cout.tie(0);
SqString s1, s2, s3, Sub;
char str1[200] = "hello";
char str2[200] = "nihao";
Assign(s1, str1);
Assign(s2, str2);
Compare(&s1, &s2);
cout << "s1的长度为:" << Length(&s1) << endl;
cout << "s2的长度为:" << Length(&s2) << endl;
Concat(&s1, &s2, &s3);
cout << "输出的字串为:" << endl;
SubString(Sub,s3, 3, 4);
return 0;
}
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