STL算法问题 [英] STL Algorithm problem
问题描述
我在使用for_each时遇到了麻烦。
设置:
课堂测试{
>
void f1(string txt)const {
for_each(txt.begin(),txt.end(),f2)
}
void f2(char a)const {
//用信件做东西
}
}
这是我想要完成的概要,但我无法接受f2。我试过mem_fun(f2),ptr_fun(f2)。但我有一种感觉,我是这样的。我会感激任何帮助我可以得到
Hi, I''m having trouble with for_each.
Setup:
class test {
void f1(string txt) const {
for_each(txt.begin(),txt.end(),f2)
}
void f2(char a) const {
//do stuff with letters
}
}
This is the general outline of what i want to accomplish, but i can''t get foreach to accept f2. I''ve tried mem_fun(f2), ptr_fun(f2). But I''ve got a feeling I''m way of. I''d appreciate any help i can get
推荐答案
你的for_each方法是什么?为什么要将函数名称传递给其他函数?
what is your for_each method? Why are you passing a function name to your other function?
你的for_each方法是什么?为什么要将函数名称传递给其他函数?
what is your for_each method? Why are you passing a function name to your other function?
for_each(begin,end,f)是一个STL算法,带有两个迭代器和一个函数对象。我的问题是如何让函数f2作为一个参数。
我的问题可以用循环来解决
for(it = begin,it< ;结束,它++)
f2(txt(it));
但是为了知识,我想知道它是如何完成的在STL中
for_each(begin, end, f) is a STL -algorithm, taking two iterators, and a funtion object. My problem is how to make it take the function f2 as an argument.
My problem could be solved with a loop
for(it=begin, it<end, it++)
f2(txt(it));
but for the sake of knowledge, I''d like to know how its done in STL
您是否编写了for_each方法?如果是这样,那么你可以在这里张贴一些CODE标签,以便我可以看看吗?
Did you write the for_each method? If so then can you post it here with some CODE tags around it so that I can take a look?
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