如何从char数组中正确删除字符(有无转换为字符串)? [英] How to properly remove a character from a char array (with or without converting to a string)?
问题描述
对于任何可能重复的问题，我们深表歉意.我一直在寻找针对我的编译器错误的解决方案，一个星期以来，我在这里尝试了各种解决方案，但仍收到一些错误.
我目前正在学习C ++，试图构建一个程序来执行诸如元音/辅音计数，字母去除等基本操作.一切正常，直到我进入自定义字母去除部分.基本上，使用字符函数(根据我的知识)几乎不可能做到这一点，而转换为字符串似乎会产生其他类型的错误.
I am currently learning C++, trying to build a program that does basic stuff like vowel/consonant count, letter removal etc. Everything works fine until I get to the custom letter removal part. Basically, it's near impossible to do that using character functions (according to my knowledge), while converting to a string seems to spawn other kinds of errors.
这是我不断收到错误的代码片段:
Here is the code fragment where I keep getting errors:
if (strcmp (service, key4) ==0)
{
string str(s);
cout<<endl<<"Please insert the letter you would like removed from your "<<phrasal<<":"<<endl;
cin>>letterToRemove;
s.erase(remove(s.begin(), s.end(),letterToRemove), s.end());
cout<<endl<<s<< "\n"<<endl;
}
这是我使用的初始化变量:
and here are initialized variable I used:
int main()
{
char s[1000], phrasal[10], service[50], key1[] = "1", key2[] = "2", key3[] = "3", key4[] = "4", key5[] = "5", key6[] = "6", key0[] = "0", *p, letterToRemove;
int vowel=0, vowel2=0, consonant=0, consonant2=0, b, i, j, k, phrase=0, minusOne, letter, idxToDel;
void pop_back();
char *s_bin;
如您所见，原始的的是一个char数组.在第一个代码示例中，我尝试将其转换为字符串数组( string str(s))，但这会导致以下编译错误:
As you can see, the original 's' is a char array. In the first code sample I have tried converting it into a string array (string str(s)), but that results in the following compiling errors:
- 错误:请求以非类类型'char [1000]'的's'中的成员'erase'
- 错误:请求成员'be'中的's'，这是非类类型'char [1000]'
- 错误:请求's'中的成员'end'，该成员是非类类型'char [1000]'
- 错误:请求's'中的成员'end'，该成员是非类类型'char [1000]'
我尝试过的另一种解决方法是:
The other workaround I've tried was this:
if(strcmp(service, key4)==0)
{std::string s(s);
cout<<endl<<"Please insert the letter you would like removed from your "<<phrasal<<":"<<endl;
cin>>letterToRemove;
s.erase(remove(s.begin(), s.end(),letterToRemove), s.end());
cout<<endl<<s<< "\n"<<endl;
}
现在这是有趣的部分，对于这一部分，我没有任何错误，但是，一旦选择自定义字母删除功能，调试就会崩溃.它是这样的:
Now here's the funny part, I get no errors whatsoever for this one, but the debug crashes as soon as I select the custom letter removal feature. Here's what it says:
终止在引发'std :: length_error'实例后调用what():基本字串:: _ S_create该应用程序已请求运行时以一种异常方式终止它.请与应用程序的支持团队联系以获取更多信息."
任何帮助将不胜感激，现在已经停留在此一周了！
Any help would be much appreciated, stuck at this one for a week now!
P.S.如果我或主持人在回答此问题后将其删除，可以吗?我敢肯定，我不是第一个提出这个问题的人，但是，正如前面提到的，即使遵循类似问题的答案，我仍然会遇到这些错误.
推荐答案
对于char数组，您必须使用 std :: remove 而不是 erase ，并手动插入null终止符:
For a char array you have to use
std::remove instead of erase, and insert the null-terminator manually:
auto newEnd = std::remove(std::begin(s), std::end(s), letterToRemove);
*newEnd = '\0';
这篇关于如何从char数组中正确删除字符(有无转换为字符串)?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
