C++：实现split分割字符串

#include <iostream>

#include <string>

#include <vector>

using namespace std;

void split(const string& src, const string& separator, vector<string>& dest)

{

string str = src;

string substring;

string::size_type start = 0, index;

do

{

index = str.find_first_of(separator,start);

if (index != string::npos)

{

substring = str.substr(start,index-start);

dest.push_back(substring);

start = str.find_first_not_of(separator,index);

if (start == string::npos) return;

}

}while(index != string::npos);



//the last token

substring = str.substr(start);

dest.push_back(substring);

}

int main()

{

string src = "Accsvr:tcp -h 127.0.0.1 -p \t 20018 ";

vector<string> d, s;

vector<string>::iterator p, q;





split(src,":",d);



for(p=d.begin();p!=d.end();++p)

{

cout << *p << endl;

s.clear();

split(*p," \t\n",s);

for (q=s.begin();q!=s.end();++q)

cout << "\t" << *q << endl;

}

return 0;

}

C语言实现方法一：

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

void split(char *src, const char *separator, char **dest, int *num)

{

char *pNext;

int count = 0;



if (src == NULL || strlen(src) == 0) return;

if (separator == NULL || strlen(separator) == 0) return;

pNext = strtok(src,separator);



while(pNext != NULL)

{

*dest++ = pNext;

++count;

pNext = strtok(NULL,separator);

}

*num = count;

}

int main()

{

char src[] = "Accsvr:tcp -h 127.0.0.1 -p\n 20018";

char *dest[128];

char *dest2[128];

int num = 0, num2 = 0;

int i, j;

split(src,":",dest,&num);

for (i=0;i<num;++i)

{

printf("|%s|\n",dest[i]);

split(dest[i]," \t\n",dest2,&num2);

for (j=0;j<num2;++j)

{

printf("|%s|\n",dest2[j]);

}

}

return 0;

}

C语言实现方法二：功能与方法一有区别

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

void split(char *src, const char *separator, char **dest, int *num)

{

char *pSeparator, *pStart, *pEnd;

unsigned int sep_len;

int count = 0;



if (src == NULL || strlen(src) == 0) return;



pSeparator = (char *)malloc(16);

if (pSeparator == NULL) return;



if (separator == NULL || strlen(separator) == 0) strcpy(pSeparator," ");/* one blank by default */

else strcpy(pSeparator,separator);

sep_len = strlen(pSeparator);



pStart = src;



while(1)

{

pEnd = strstr(pStart, pSeparator);

if (pEnd != NULL)

{

memset(pEnd,'\0',sep_len);

*dest++ = pStart;

pEnd = pEnd + sep_len;

pStart = pEnd;

++count;

}

else

{

*dest = pStart;

++count;

break;

}

}

*num = count;

if (pSeparator != NULL) free(pSeparator);

}

int main()

{

char src[] = "Accsvr:tcp -h 127.0.0.1 -p 20018";

char *dest[128];

char *dest2[128];

int num = 0, num2 = 0;

int i, j;

split(src,":",dest,&num);

for (i=0;i<num;++i)

{

printf("|%s|\n",dest[i]);

split(dest[i],"\t",dest2,&num2);

for (j=0;j<num2;++j)

{

printf("|%s|\n",dest2[j]);

}

}

return 0;

}

来源：http://www.rosoo.net/a/201106/14519.html