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C++ 调用模板函数时出现编译器错误_C++_Templates_Compiler Errors_Custom Data Type - Fatal编程技术网

C++ 调用模板函数时出现编译器错误

C++ 调用模板函数时出现编译器错误,c++,templates,compiler-errors,custom-data-type,C++,Templates,Compiler Errors,Custom Data Type,我在编译时遇到以下错误: Compilation started at Wed Oct 5 03:05:32 |make -k proj1 |g++ proj1.cc -o proj1 |proj1.cc: In function ‘int main()’: |proj1.cc:75:13: error: no matching function for call to ‘getData()’ |proj1.cc:75:13: note: candidate i

我在编译时遇到以下错误:

     Compilation started at Wed Oct  5 03:05:32
 |make -k proj1
 |g++     proj1.cc   -o proj1
 |proj1.cc: In function ‘int main()’:
 |proj1.cc:75:13: error: no matching function for call to ‘getData()’
 |proj1.cc:75:13: note: candidate is:
 |proj1.cc:46:6: note: template<class T> void getData(Vector<T>&, int&)
 |proj1.cc:80:16: error: no matching function for call to
 ‘computeSum()’
 |proj1.cc:80:16: note: candidate is:
 |proj1.cc:28:6: note: template<class T> void computeSum(Vector<T>,
 int, T&, bool&)
 |proj1.cc:83:9: error: ‘success’ was not declared in this scope
 |proj1.cc:84:27: error: ‘total’ was not declared in this scope
 make: *** [proj1] Error 1
     Compilation exited abnormally with code 2 at Wed Oct  5 03:05:33
编译于10月5日星期三03:05:32开始
|make-k proj1
|g++proj1.cc-o proj1
|proj1.cc:在函数“int main()”中:
|proj1.cc:75:13:错误:调用“getData()”时没有匹配的函数
|项目J1.cc:75:13:注:候选人为:
|proj1.cc:46:6:注意:模板void getData(Vector&,int&)
|proj1.cc:80:16:错误:没有用于调用的匹配函数
“computeSum()”
|项目J1.cc:80:16:注:候选人为:
|项目1.cc:28:6:注:模板无效计算(向量,
int,T&,bool&)
|proj1.cc:83:9:错误:未在此作用域中声明“success”
|proj1.cc:84:27:错误:未在此作用域中声明“total”
制造:**[proj1]错误1
编译在星期三10月5日03:05:33异常退出,代码为2
我只是没有调用我的模板吗

#include <std_lib_facilities.h>                                                                                                                                                                                   
#include <vector>
#include <string>
#include <iostream>

class T
{
public:                                                                                                                                     
    void computeSum(vector<T> in, int n, T &out, bool &success);
    void getData(vector<T> &data, int &howMany);
};

template <class T>
// void computeSum(vector<T> data, int howMany, T& out, bool& success)                                                                                                                                           
void computeSum(vector<T> data, int n, T &out, bool &success)
{

    if (n < data.size()){
        success = true;
        int i = 0;
        while (i<n){
            out = out + data[i];
            ++i;
        }
    } else {
        success = false;
        cerr << "You can not request to sum up more numbers than there are.\n";
    }

}

template <class T>
void getData(vector<T> &data, int &howMany)
{
    cout << "Please insert the data:\n";                                                                                                                                                                                        
    T n;

    do{
        cin >> n;
        data.push_back(n);
    } while (n<howMany);

    cout << "This vector has " << data.size() << " numbers.\n";
}

void offerHelp()
{
    cout << "Do you want help? ";
    string help;
    cin >> help;
    if (help == "n" || help == "no"){
        cout << endl;
    }else{
        cout << "Enter your data. Negative numbers will be added as 0. Ctrl-D to finish inputing values.\n";
    }
}

int main()
{
    offerHelp();
    getData();

    cout << "How many numbers would you like to sum?";
    int howMany;
    cin >> howMany;
    computeSum();                                                                                                                                                                                  

    if (success = true) {
        cout << "The sum is " << total << endl;
    } else {
        cerr << "Oops, an error has occured.\n";
    }

    cout << endl;
    return 0;
}
#包括
#包括
#包括
#包括
T类
{
公众:
无效计算(向量输入、整数n、T和输出、布尔和成功);
void getData(向量和数据、整数和数量);
};
模板
//void computeSum(矢量数据、整数数量、T和out、布尔和成功)
无效计算(矢量数据、整数n、T和out、布尔和成功)
{
如果(n而(i您的函数被声明和定义为:

void getData(向量&,整数&)

你称之为:

getData()

显然,编译器找不到不带参数的函数,因此
没有匹配函数
错误

computeSum()
的情况也是如此


还有许多其他错误,如
success
total
是在
main
中访问但未在
main
中声明的两个变量。您的函数声明和定义如下:

void getData(向量&,整数&)

你称之为:

getData()

显然,编译器找不到不带参数的函数,因此
没有匹配函数
错误

computeSum()
的情况也是如此


还有许多其他错误,如
success
total
是在
main
中访问但未在
main
中声明的两个变量。您忘记了将参数传递给函数,例如:

void computeSum(vector<T> data, int n, T &out, bool &success)

computeSum();  
void computeSum(向量数据、int n、T&out、bool&success)
computeSum();

显然,函数签名不匹配。而且您的类T没有声明为模板类。我认为这是您最初的意图。函数computeSum和getData没有实现类的公共成员函数。

您忘记了将参数传递给函数,例如:

void computeSum(vector<T> data, int n, T &out, bool &success)

computeSum();  
void computeSum(向量数据、int n、T&out、bool&success)
computeSum();
显然,函数签名不匹配。而且您的类T没有声明为模板类。我认为这是您最初的意图。函数computeSum和getData没有实现该类的公共成员函数