std的学习记录

1.转化 std::transform

std::string str = "xxx";

std::transform(str.begin,str.end,str.begin,::tolower);//小写

//对每个元素增加1

vector<int> first;

int op_increase (int i)
{
    return i+1;
}

std::transform(first.begin,first.end,first.begin,op_increase);