C语言数据结构之串插入操作
实例代码：
/* 串的堆分配存储表示 */
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define OK 1
#define ERROR 0
#define TRUE 1
#define FALSE 0
#define OVERFLOW -2
typedef int Status;
typedef struct
{
char *ch; //如果是非空串，则按串长分配存储区，否则ch为NULL
int length; //串长度
}HString;
/*******************************声明部分****************************************/
Status StrAssign(HString *T,char *chars);
//生成一个其值等于串常量chars的串T
Status StrInsert (HString *S,int pos,HString T);
//1<=pos<=StrLength(S)+1.在串S的第pos个字符之前插入串T
int StrLength(HString S);
//返回S的元素个数，成为串的长度
int StrCompare(HString S,HString T);
//若S>T，则返回值>0,若S=T，则返回值 = 0，若S<T，则返回值<0
Status ClearString(HString *S);
//将S清空
Status Concat(HString *T,HString S1,HString S2);
//用T返回由S1和S2连接而成的新串
Status SubString(HString *Sub,HString S,int pos,int len);
//用Sub返回串S的第pos个字符起长度为len的子串
//其中,1<= pos<= StrLength(S) 且 0<= len <= StrLength(S)-pos+1
Status StrCopy(HString *T, HString S);
/*******************************函数部分****************************************/
Status StrAssign(HString *T,char *chars)
{
if((*T).ch){ //释放旧空间
free((*T).ch);
}
int i = strlen(chars);
if(!i){ //若chars为空
(*T).ch = NULL;
(*T).length = 0;
}
else{ //chars不空
if(!((*T).ch = (char *)malloc(i * sizeof(char)))) //为T分配chars所需的存储空间
exit(OVERFLOW);
int count;
for(count = 0;count <= i-1;count++){ //把chars存入T中
(*T).ch[count] = chars[count];
(*T).length = i;
} //for
} //else
return OK;
}
int StrLength(HString S)
{
return S.length;
}
int StrCompare(HString S,HString T)
{
int count;
for(count = 0;count < S.length && count < T.length;count++){
if(S.ch[count] != T.ch[count])
return S.ch[count] - T.ch[count];
}
return S.length - T.length;
}
Status ClearString(HString *S)
{
if((*S).ch){
free((*S).ch);
(*S).ch = NULL;
}
(*S).length = 0;
return OK;
}
Status Concat(HString *T,HString S1,HString S2)
{
if((*T).ch){ //释放旧空间
free((*T).ch);
}
if(!((*T).ch = (char *)malloc((S1.length+S2.length)* sizeof(char))))
exit(OVERFLOW);
int count,cnt;
for(count = 0;count <= S1.length;count++){ //把S1存入T中
(*T).ch[count] = S1.ch[count];
}
(*T).length = S1.length + S2.length; //更改T的长度为两串之和
for(count = S1.length,cnt = 0;count <= (*T).length;count++,cnt++){
(*T).ch[count] = S2.ch[cnt]; //把S2存入T中
}
return OK;
}
Status SubString(HString *Sub,HString S,int pos,int len)
{
if(pos<1 || pos>S.length || len<0 || len >S.length-pos+1)
return ERROR;
if((*Sub).ch){ //释放旧空间
free((*Sub).ch);
}
if(!len){
(*Sub).ch = NULL;
(*Sub).length = 0; //空子串
}
else{ //完整子串
(*Sub).ch = (char *)malloc(len*sizeof(char));
int count,cnt;
for(count = 0,cnt = pos-1;count <= len-1;count++,cnt++){
(*Sub).ch[count] = S.ch[cnt];
}
(*Sub).length = len;
}//else
return OK;
}
Status StrInsert (HString *S,int pos,HString T)
{
if(pos<1 || pos >(*S).length+1)
return ERROR; //pos不合法
if(T.length){
if(!((*S).ch = (char*)realloc((*S).ch,((*S).length + T.length)*sizeof(char))))
exit(OVERFLOW);
int count,cnt;
for(count = (*S).length-1;count>= pos-1;count--){
(*S).ch[count+T.length-1] = (*S).ch[count]; //为插入T腾出位置
}
for(count = pos-1,cnt = 0;cnt<= T.length-1;count++,cnt++)
(*S).ch[count] = T.ch[cnt]; //插入T
(*S).length += T.length;
}//if
return OK;
}
Status StrCopy(HString *T, HString S){
int j;
if((*T).ch)
free((*T).ch);
(*T).ch = (char*)malloc(S.length * sizeof(char));
if(!(*T).ch)
exit(OVERFLOW);
for(j = 0; j < S.length; j++)
(*T).ch[j] = S.ch[j];
(*T).length = S.length;
return OK;
}
/*******************************主函数部分**************************************/
int main()
{
HString T,S,S1,S2,Sub;
char *charsT = "abcd";
char *chars1 = "abc";
char *chars2 = "AAAA";
StrAssign(&T,charsT);
StrAssign(&S,chars1);
StrAssign(&S1,chars1);
StrAssign(&S2,chars2);
int count;
printf("T的长度为：%d\n",T.length);
printf("T的内容为：");
for(count = 0;count <T.length;count++){
printf("%c",T.ch[count]);
}
printf("\n");
printf("\nStrCompare(S,T) = %d\n",StrCompare(S,T));
Concat(&T,S1,S2);
printf("\n链接S1，S2为T之后\n");
printf("T的长度为：%d\n",T.length);
printf("T的内容为：");
for(count = 0;count <T.length;count++){
printf("%c",T.ch[count]);
}
printf("\n");
printf("\nS的长度为：%d\n",S.length);
printf("S的内容为：");
for(count = 0;count <S.length;count++){
printf("%c",S.ch[count]);
}
printf("用Sub返回S的第1个字符起长度为2的子串\n");
SubString(&Sub,S,1,2);
printf("Sub的长度为：%d\n",Sub.length);
printf("Sub的内容为：");
for(count = 0;count <Sub.length;count++){
printf("%c",Sub.ch[count]);
}
printf("\n");
printf("\n在串S的第1个字符之前插入串T\n");
StrInsert(&S,1,T);
printf("S的长度为：%d\n",S.length);
printf("S的内容为：");
for(count = 0;count <S.length;count++){
printf("%c",S.ch[count]);
}
return 0;
}
实现效果:
如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！