C++ 错误：从“char”到“const char*”的无效转换
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C++ Error: Invalid conversion from 'char' to 'const char*'
提问by LazySloth13
I'm completely new to C++ and I created this function:
我对 C++ 完全陌生，我创建了这个函数：
bool guessWord(string compWord)
{
cout << "Guess a letter: ";
string userLetter;
cin >> userLetter;
for (unsigned int x = 0; x < compWord.length(); x++)
{
string compLetter = compWord[x];
if (compLetter == userLetter)
{
return true;
}
}
return false;
}
But it returns to following error: invalid conversion from 'char' to 'const char*' [-fpermissive]. Can anyone help me understand what this means?
但它返回到以下error: invalid conversion from 'char' to 'const char*' [-fpermissive]. 谁能帮我理解这意味着什么？
采纳答案by ForEveR
string compLetter = compWord[x];
compWord[x]gets charand you are trying to assign it to string, that's wrong.
However, your code should be something like
compWord[x]获取char而您试图将其分配给string，这是错误的。但是，您的代码应该类似于
bool guessWord(string compWord)
{
cout << "Guess a letter: ";
char userLetter;
cin >> userLetter;
for (unsigned int x = 0; x < compWord.length(); x++)
{
char compLetter = compWord[x];
if (compLetter == userLetter)
{
return true;
}
}
return false;
}
回答by Manoj Awasthi
string compLetter = compWord[x];
string compLetter = compWord[x];
should be
应该
char compLetter = compWord[x];
char compLetter = compWord[x];
回答by SlxS
On this line
在这条线上
string compLetter = compWord[x];
You're assigning a char to a string. Changing it to
您正在为字符串分配一个字符。将其更改为
char compLetter = compWord[x];
Should do the trick.
应该做的伎俩。
回答by Saanti
compWord[x] gives you the x'th character in string compWord, which you are then trying to assign to a string.
compWord[x] 为您提供字符串 compWord 中的第 x 个字符，然后您尝试将其分配给字符串。
You should either compare both strings directly, or iterate over them in parallel and compare character by character.
您应该直接比较两个字符串，或者并行迭代它们并逐个字符地比较。
回答by Peter Wood
You can use std::string::findto see whether a character is in the string. If it's not, it returns std::string::npos:
您可以使用std::string::find来查看字符是否在string. 如果不是，则返回std::string::npos：
bool guessLetter(string compWord)
{
cout << "Guess a letter: ";
char userLetter;
cin >> userLetter;
return compWord.find(userLetter) != string::npos;
}
}
