C++去掉字符串中首尾空格和所有空格

int main()
{

cout << "-------------------------------------" << endl;

string pri = "  7ter   09, jdhfd iere*- ddw     jjdjjdj     ";
cout << "private string is : \"" << pri << "\"" << endl;
trim(pri);
cout << "after string is : \"" << pri << "\"" << endl;

cout << "-------------------------------------" << endl;

return 0;
}