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i have try it for so long time
plz tell me why??

#include <iostream>
#include <cstring>

using namespace std;

void stringaddintfront(string &nstring,int c)
{
char self = c % 10 + '0';
string addstr;
addstr.push_back(self);
nstring = addstr + nstring;

}

int main(int argc, char *argv ...