VC String Processing Collation

Scene:

1. When storing data, interfaces sometimes need to combine string values and merge parts with special characters to split them when needed. such as some values, names and so on.

2.c++ has Strtok,stringstream and find functions to achieve segmentation. can be called depending on the situation.

#include <stdlib.h>#include<string.h>#include #include<iostream>#include<sstream>#include<vector>using namespacestd;voidTeststrtok () {//1. Non-thread-safe, if multiple threads are called at the same time, the original value will be overwritten. //2. Support for string segmentation. //3. The source string must be modifiable.    Charc_str[]="google| | twitter| | facebook| | microsoft| | apple| | ibm| |"; Const Char* Delim ="||"; Char* result =strtok (C_str,delim);  while(Result! =NULL) {cout<< result <<Endl; Result=strtok (Null,delim); }} voidTestgetlinewithstringstream () {//1. Thread-safe, but only as a character delimiterStringStream SS ("google|twitter|facebook|microsoft|apple|ibm|"); stringstr;  while(Getline (SS,STR,'|') ) {cout<< Str <<Endl; }} voidTeststringfind () {//1. Implement it yourself, thread safe, support string as delimiter. The disadvantage may be that there is more code.    stringstr ="google| | twitter| | facebook| | microsoft| | apple| | ibm| |"; Const Char* Delim ="||"; Const intLen =strlen (Delim); size_t Index=0; size_t POS=Str.find (Delim,index);  while(POS! =string:: NPOs) {        stringSS = Str.substr (index,pos-index); cout<< SS <<Endl; Index= pos+Len; POS=Str.find (Delim,index); }     //cout << "is last?" << "index:" << index << "str.length ():" << str.length () << en DL;    if((index+1) <str.length ()) {        stringSS = Str.substr (Index,str.length ()-index); cout<< SS <<Endl; }} intMainintargcChar Const*argv[]) {cout<<"Teststrtok:"<<Endl;    Teststrtok (); cout<<"Testgetlinewithstringstream:"<<Endl;    Testgetlinewithstringstream (); cout<<"Teststringfind:"<<Endl;     Teststringfind (); return 0;}

Output:

TestStrtok: google twitter facebook microsoft apple ibm TestGetLineWithStringStream: google twitter facebook microsoft apple ibm TestStringFind: google twitter facebook microsoft apple ibm [Finished in 0 .2s]

char* A[3];
char* BUF = "This is the first line \ n This is the second line \ n This is the third line \ n";

I want to use ' \ n ' to divide buf into three paragraphs and deposit them in a[1],a[2],a[3],
How do I do it ~

#include <stdio.h>#include<string.h>#include<malloc.h>intMain () {Char*a[3]; Char*buf ="This is the first line \ n This is the second line \ n This is the third line \ n"; Char*t, *pre =buf;inti =0, L; while(t = STRCHR (PRE,'\ n')) {  if(I >=3)    Break; L= T-Pre; A[i]= (Char*)malloc(L +1);  strncpy (A[i], pre, L); A[I][L]=' /'; ++i; Pre= T +1; }  for(i =0; I <3; ++i) {printf ("%s\n", A[i]);  Free(A[i]);} return 0;}

VC String Processing Collation