C++ - ' ' 之前的预期主表达式
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原文地址: http://stackoverflow.com/questions/11507607/
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C++ -- expected primary-expression before ' '
提问by LTK
Update: Thanks everyone for your quick responses -- problem solved!
更新：感谢大家的快速回复——问题已解决！
I am new to C++ and programming, and have run into an error that I cannot figure out. When I try to run the program, I get the following error message:
我是 C++ 和编程的新手，遇到了一个我无法弄清楚的错误。当我尝试运行该程序时，我收到以下错误消息：
stringPerm.cpp: In function ‘int main()':
stringPerm.cpp:12: error: expected primary-expression before ‘word'
I've also tried defining the variables on a separate line before assigning them to the functions, but I end up getting the same error message.
我还尝试在将变量分配给函数之前在单独的行上定义变量，但最终得到相同的错误消息。
Can anyone offer some advice about this? Thanks in advance!
任何人都可以就此提供一些建议吗？提前致谢！
See code below:
见下面的代码：
#include <iostream>
#include <string>
using namespace std;
string userInput();
int wordLengthFunction(string word);
int permutation(int wordLength);
int main()
{
string word = userInput();
int wordLength = wordLengthFunction(string word);
cout << word << " has " << permutation(wordLength) << " permutations." << endl;
return 0;
}
string userInput()
{
string word;
cout << "Please enter a word: ";
cin >> word;
return word;
}
int wordLengthFunction(string word)
{
int wordLength;
wordLength = word.length();
return wordLength;
}
int permutation(int wordLength)
{
if (wordLength == 1)
{
return wordLength;
}
else
{
return wordLength * permutation(wordLength - 1);
}
}
回答by Omaha
You don't need "string" in your call to wordLengthFunction().
您在调用wordLengthFunction().
int wordLength = wordLengthFunction(string word);
int wordLength = wordLengthFunction(string word);
should be
应该
int wordLength = wordLengthFunction(word);
int wordLength = wordLengthFunction(word);
回答by fbafelipe
Change
改变
int wordLength = wordLengthFunction(string word);
to
到
int wordLength = wordLengthFunction(word);
回答by crashmstr
You should not be repeating the stringpart when sending parameters.
string发送参数时不应重复该部分。
int wordLength = wordLengthFunction(word); //you do not put string word here.
