从字符串中提取所有数字（含负数，小数，0），请教是否正确?

[diyixiyou2009]

//输出结果为
//AAAAAAA1.8BBBBBBBB0CCCC-78DDDDDDDDDD0.9EEEEEEEEEEEEE
//#1=1.8
//#2=0
//#3=-78
//#4=0.9
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <stdlib.h>
using namespace std;
bool takenums(string src,vector<double>& v);
int main()
{
    string src="AAAAAAA1.8BBBBBBBB0CCCC-78DDDDDDDDDD0.9EEEEEEEEEEEEE";
    cout<<src<<endl;
    vector<double> v;
    takenums(src,v);
    int size=v.size();
    for(int i=0;i<size;i++)
    {
            cout<<"#"<<i+1<<"="<<v[i]<<endl;
            }
    
    system("PAUSE");
    
    return 0;
    
}
bool takenums(string src,vector<double>& v)
{
     int size=src.size();
     for(int i=0;i<size;i++)
     {
      if((src.at(i)<'0'||src.at(i)>'9')&&src.at(i)!='.'&&src.at(i)!='-')
      src[i]='|';     
     }
     src+="|";                    
     string::size_type pos;
     while((pos=src.find("|"))!=string::npos)
     {
      if(pos==0) //only '|'
      {
                src=src.substr(pos+1,src.length()-pos-1);
                continue;
      }else
      {
           string t=src.substr(0,pos);
           int len=t.length();
           if(t=="0"||t=="0.0"||t=="0.00"||t=="0.000"||t=="0.0000"||t=="0.00000"||t=="0.000000")
           {                                                                                        
              v.push_back(0.0);
              src=src.substr(pos,src.length()-pos-len);
              continue;                    
           }
           
           float res=atof(t.c_str());
           if(res!=0.0) //num
           {
             v.push_back(res);
           }
           src=src.substr(pos,src.length()-pos);
       }
                                             
     }
     
     return true;
 }

[赵4老师]

#include <stdio.h>
char s[]="123 ab 4";
char *p;
int v,n,k;
void main() {
    p=s;
    while (1) {
        k=sscanf(p,"%d%n",&v,&n);
        printf("k,v,n=%d,%d,%d\n",k,v,n);
        if (1==k) {
            p+=n;
        } else if (0==k) {
            printf("skip char[%c]\n",p[0]);
            p++;
        } else {//EOF==k
            break;
        }
    }
    printf("End.\n");
}
//k,v,n=1,123,3
//k,v,n=0,123,3
//skip char[ ]
//k,v,n=0,123,3
//skip char[a]
//k,v,n=0,123,3
//skip char[b]
//k,v,n=1,4,2
//k,v,n=-1,4,2
//End.

[ztenv]

不需要自己写吧？正则