Question

I m 将这一错误带入第6行:

error: expected unqualified-id before  {  token

我可以说出什么错误。

#include <iostream>

using namespace std;

class WordGame;
{               // <== error is here on line 6
public:

    void setWord( string word )
    {
        theWord = word;
    }
    string getWord()
    {
        return theWord;
    }
    void displayWord()
    {
        cout << "Your word is " << getWord() << endl;
    }
private:
    string theWord;
}


int main()
{
    string aWord;
    WordGame theGame;
    cin >> aWord;
    theGame.setWord(aWord);
    theGame.displaymessage();

}

Answer 1

这里不应有半殖民地:

class WordGame;

......在您的班级定义的末尾应当:

...
private:
    string theWord;
}; // <-- Semicolon should be at the end of your class definition

Answer 2

作为附带说明,考虑在“Word()”中添加插图,作为避免过份复制的参考资料。此外,在显示Word中,考虑将这一职能置于最协调的基础之上。

void setWord(const std::string& word) {
  theWord = word;
}

Answer 3

Get rid of the semicolon after WordGame.

确实,当这个班子小得多时,你本应发现这个问题。当你重写法典时,你应每增加一半。

Answer 4

Semicolon should be at the end of the class definition rather than after the name:

class WordGame
{
};

Answer 5

对于其价值来说,我有同样的问题,但由于有一个<斯特隆>extra的半殖民地,那是因为我忘记了先前发言中的一个半殖民地。

我的情况类似。

mynamespace::MyObject otherObject

for (const auto& element: otherObject.myVector) {
  // execute arbitrary code on element
  //...
  //...
}

我的汇编者从这一法典中告诉我:

error: expected unqualified-id before for (const auto& element: otherObject.myVector) { etc... which I d taken to mean I d writtten the for loop wrong. Nope! I d simply forgotten a ; after declaring otherObject.

Answer 6

对有这种情况的人: 我在意外使用<密码>my_first_cop:my_second_cop:true取代单纯的true时,就看到了这一错误。

bool my_var = my_first_scope::my_second_scope::true;

instead of:

bool my_var = true;

这是因为我有一个宏观因素,导致<代码>MY_MACRO(true)扩大至my_first_cop:my_second_cop:true,错,我实际上叫<>bool my_var = MY_MACRO(true);。

这里是这种范围差错的快速解调:

方案(可上网查阅:):

#include <iostream>
#include <cstdio>

namespace my_first_scope 
{
namespace my_second_scope
{
} // namespace my_second_scope
} // namespace my_first_scope

int main()
{
    printf("Hello World
");
    
    bool my_var = my_first_scope::my_second_scope::true;
    
    std::cout << my_var << std::endl;

    return 0;
}

产出(差错):

main.cpp: In function ‘int main()’:
main.cpp:27:52: error: expected unqualified-id before ‘true’
     bool my_var = my_first_scope::my_second_scope::true;
                                                    ^~~~

通知错误:error: 预期在“true'之前不合格,在错误下arrow指点。 www.un.org/Depts/DGACM/index_spanish.htm 范围我刚刚在<代码>true上登出。

在宏观和使用中,我添加(这里是::https://onlinegdb.com/H1eevs58D):

#define MY_MACRO(input) my_first_scope::my_second_scope::input

...

bool my_var = MY_MACRO(true);

我发现这一新错误:

main.cpp: In function ‘int main()’:
main.cpp:29:28: error: expected unqualified-id before ‘true’
     bool my_var = MY_MACRO(true);
                            ^
main.cpp:16:58: note: in definition of macro ‘MY_MACRO’
 #define MY_MACRO(input) my_first_scope::my_second_scope::input
                                                          ^~~~~

Answer 7

I got this error because I was not declaring a variable and was using it further . Here is my code why I was getting it.

It was because I was not declaring a variable for size of my >vector. Just replace

int n=arr.size();

改为:

int sumSubarrayMins(vector<int>& arr) {
        
        
        int = arr.size();
        long long sum;
        long long ans =0;
        for(long i =0;i<n;i++){
            
             sum =0;
            long mini=INT_MAX;
            for(long long j =i;j<n;j++){
                mini=min(mini,arr[j]);
                sum+=mini;
            }
            ans+=sum;
           

        }
        return ans;
    }

Answer 8

您忘记了这一空白。

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