带有中文的字符串各个字符的获取c++程序
简单易懂，上代码：
[cpp]
#include <iostream>
#include <cstring>
#include <string>
#include <cstdlib>
#include <vector>
using namespace std;
class str{
char *c;
typedef struct {
int start;
bool isChinese;
} counter;
int cLen;
vector<counter> cs;
void calculate(){
cLen = sizeof("你") - 1;
int size = 0;
for(int i = 0; i < getlen();){
counter ic;
ic.start = i;
//根据第一个字符是否为负数判断是否为中文。。这个不知道是不是万金油，但是大多数情况应该可以应付。
if(c[i] < 0){
ic.isChinese = true;
i += cLen;
}else{
ic.isChinese = false;
i++;
}
cs.push_back(ic);
}
}
public:
str(const char *cc){
cout<<"构造"<<endl;
c = new char[strlen(cc) + 1];
strcpy(c, cc);
calculate();
}
str(const str& s){//copy
cout<<"copy"<<endl;
c = new char[s.getlen() + 1];
strcpy(c, s.getstr());
calculate();
}
const str& operator =(const str& s){
cout<<"= operator"<<endl;
if(&s == this) return s;
cs.clear();
delete []c;
c = new char[s.getlen() +1];
strcpy(c, s.getstr());
calculate();
return *this;
}
//获取源字符串
const char *getstr() const{return c;}
//源字符串 字节数，不包括'\0'
int getlen() const{
return strlen(c);
}
//真正字符个数，包括中英文。不包括'\0'
int getsize() const{
return cs.size();
}
//获取第i个字符，可以为中文或英文。
const char* get(int i) const{
if(i > getsize()){
cout<<"error in get "<<endl;
return NULL;
}
const counter &cc = cs[i];
char *r = NULL;
int len = 0;
if(cc.isChinese){
r = new char[cLen + 1];
len = cLen;
}else{
r = new char[2];
len = 1;
}
memcpy(r, c + cc.start, len);
r[len] = '\0';
string rs = r;
delete[]r;
return rs.c_str();
}
void printBytes(const char *start, const char *end) const{//debug
int i = 0;
do{
cout<<(int)*(start+i)<<"\t";
}while(start+(++i) < end);
cout<<endl;
}
//遍历
void traversal() const {//debug
for(int i = 0; i < getsize(); i++){
cout<<get(i)<<" ";
//printBytes(get(i), get(i) + strlen(get(i)));
}
cout<<endl;
}
virtual ~str(){
delete []c;
}
};
int main(){
//construct
str s("13,4?!你好。～！sda");
s.traversal();
str s1 = s;//copy
cout<<s1.getlen()<<endl;
s1.traversal();
s1 = s;//oeprator =
cout<<s1.getlen()<<endl;
s1.traversal();
return 0;
}
补充：软件开发 , C++ ,
