错误LNK2019：无法解析的外部符号 “双__cdecl calculateRetail（双，双）”

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我得到这个错误： error LNK2019: unresolved external symbol "double __cdecl calculateRetail(double,double)" ([email protected]@[email protected]) referenced in function _main 1>c:\users\100236744\documents\visual studio 2010\Projects\Item sales price calculator\Debug\Item sales price calculator.exe : fatal error LNK1120: 1 unresolved externals错误LNK2019：无法解析的外部符号 “双__cdecl calculateRetail（双，双）”

我很新的C++。

// FILE: Price markup calculator.cpp 
// PROGRAMMER: Karolina Sabat CPSC 1103 Section: S11 
// Program which calculates the retail cost of an item based on wholesale cost and mark up percentage. 
// Calculates the total interest paid based on the annual interest rate. 

#include <iostream>   // For cin, cout 
#include <iomanip>   // For setw, setprecision 
using namespace std; 

// FUNCTION PROTOTYPES 
void getData (double &, double &);   // Receives USER INPUT - Wholesale cost & percentage markup 
double calculateRetail(double, double);  // Calculates retail price 
void Display (double, double, double);  // Displays results: Wholesale cost, markup percentage, retail price 

int main() 
{ 

// VARIABLES 
double wholesale_cost = 0;     // Wholesale item cost - USER INPUT 
double markup_percent = 0;     // Markup percentage 
double retail_price = 0;    // Calculated retail cost 

// FUNCTION CALL 1: Wholesale cost - USER INPUT 
getData(wholesale_cost, markup_percent); 
// FUNCTION CALL 2: Retail price - CALCULATION 
calculateRetail(wholesale_cost, markup_percent); 
// FUNCTION CALL 3: Display Wholesale price, markup percentage, retail price - OUTPUT 
Display(wholesale_cost, markup_percent, retail_price); 
// PROGRAM MADE BY - OUTPUT 
cout << endl << endl; 
cout << " Written by: Karolina Sabat - CPSC 1103 - Section: S11" << endl << endl; 
return 0; 
} 

// FUNCTION 1: GetData 
void getData (double &wholesale_c, double &markup_p) 
{ 
// Wholesale cost - USER INPUT 
cout << " Please enter the item's wholesale cost: $ "; 
cin >> wholesale_c; 
// Wholesale cost - INVALID ENTRY 
while (wholesale_c < 0) 
{ 
    cout << endl; 
    cout << " Please enter a wholesale cost greater than 0." << endl; 
    cout << " Item's wholesale cost: $ "; 
    // Will clear characters 
    cin.clear(); 
    cin.ignore(numeric_limits<streamsize>::max(), '\n'); 
    cin >> wholesale_c; 
} 
// Wholesalecost - VALID 
// Markup percentage - USER INPUT 
cout << "Please enter the markup percentage: % " ; 
cin >> markup_p; 
// Markup percentage - INVALID 
while (markup_p < 0) 
{ 
    cout << " ERROR: INVALID INPUT." << endl; 
    cout << " Please enter a markup percentage greater than 0." << endl; 
    cout << " Markup percentage: % "; 
    // Will clear characters 
    cin.clear(); 
    cin.ignore(numeric_limits<streamsize>::max(), '\n'); 
    cin >> markup_p; 
} 
} 

// FUNCTION 2: CalculateRetail 
double CalculateRetail (double wholesale_c, double markup_p) 
{ 
// VARIABLES 
double markup_amount; 
double retail_price; 
// CALCULATIONS 
markup_amount = (wholesale_c * markup_p)/100; 
// Markup amount 
retail_price = wholesale_c + markup_amount; 
return retail_price; 
} 

// FUNCTION 3: Display 
void Display (double wholesale_cost, double markup_percent, double retail_price) 
{ 
// Title - OUTPUT 
cout << endl; 
cout << " WHOLESALE COST: " << setw(10) << "PRICE MARKUP %: " << setw(10) << "RETAIL PRICE" << endl; 
cout << " ________________________________________________________________________________" << endl; 
cout << endl; 
// NUMBER FORMATING 
cout << setprecision(2) << fixed << showpoint; 
// Results - OUTPUT 
cout << " " << wholesale_cost << setw(10) << markup_percent << setw(10) << retail_price; 
}

来源

2014-03-07 tinywolves

[错误LNK2019解析外部符号]的可能重复（http://stackoverflow.com/questions/12297952/error-lnk2019-unresolved-external-symbol）和约三十多人。搜索“错误LNK2019：无法解析的外部符号”可能会引发许多以往问题的链接。在发布之前先进行基础研究是很好的。 –

我没有搜索过这个论坛，我明白这个错误，但是一小时后我的代码找不到错误。我没有看到大写错误。其他人的编码错误不能帮助我。 – tinywolves

好的，它应该是关闭的话题，因为“这个问题是由不能再现的问题引起的，或者是一个简单的印刷错误**。虽然类似的问题可能在这里讨论，但这个问题已经解决了以不太可能帮助未来读者的方式，这通常可以通过识别并密切检查在发布之前重现问题所需的最短程序来避免。“ –

您遇到这个问题，因为你写的原型功能：

double calculateRetail(double, double);

但是当你实现的功能，你写道：

double CalculateRetail (double wholesale_c, double markup_p)

C和C++是区分大小写所以它没有看到CalculateRetail和calculateRetail一样。你可能打算把CalculateRetail写成calculateRetail。

来源

2014-03-07 03:45:11 OSborn

double calculateRetail(double, double); 

double CalculateRetail (double wholesale_c, double markup_p)

你的函数定义不其原型完全匹配。如果您将定义的名称更改为calculateRetail，它应该可以工作。

来源

2014-03-07 03:44:22 computerfreaker

哦，我的上帝。两个小时的资本化错误我看不到。我不能相信你注意到了这一点。是的，它的工作。哇。 – tinywolves

@ user3390939仅供将来参考，这种链接器错误通常意味着发生了这种类型的错字。它通常意味着定义的名称与声明的名称不匹配，或者定义中的参数类型与声明中的参数类型不匹配。 – computerfreaker

calculateRetail delacred and used。已定义CalculateRetail。 ...... ！C = C

来源

2014-03-07 03:45:20 Cigany

错误LNK2019：无法解析的外部符号 “双__cdecl calculateRetail（双，双）”

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