1.把一个字符串内的正整数相加

#include "string"
typedef std::basic_string<TCHAR> tstring;
int _tmain(int argc, _TCHAR* argv[])
{
    
    tstring str= _T("没2有60最脑40残只有100更脑残!5");
    const tstring numSet = _T("0123456789");
    tstring::size_type pos = str.find_first_of(numSet);
    int iFinal(0);
    while (str.npos != pos){
        tstring::size_type pos2 = str.find_first_not_of(numSet, pos);
        tstring strNum = str.substr(pos, pos2 - pos);
        int iNum = _ttoi(strNum.c_str());
        iFinal += iNum;
        pos = str.find_first_of(numSet, pos2);
    }

    return 0;
}