LNK2019错误，无法解析的外部符号 [英] LNK2019 error, unresolved external symbol

问题描述

  1> yes.obj：error LNK2019：无法解析的外部符号int __cdecl availableMoves（int * （void）__cdecl solveGame（int * const，int（* const）[4]）（？solveGame @@）中引用的const，int（* const）[4]，int）（？availableMoves @@ YAHQAHQAY03HH @ Z） YAXQAHQAY03H @ Z）
  

我以前从未见过这个错误。以下是我相信它指的两个函数。

  int availableMoves（int a [15]，int b [36] [3]，int openSpace）{
 int count = 0;如果（i <36& b [i] [2] == openSpace&&& isPeg（b [ i] [0]，a）&& isPeg（b [i] [1]，a））{
 count ++; 
} 
} 
 return count; 
} 
  

和

 void solveGame（int a [15]，int b [36] [4]）{
 int empSpace; 
 int movesLeft; （pegCount（a）<2）{
 cout <<<游戏结束<<<<<<<< 
} else {
 empSpace = findEmpty（a）; 
 if（movesLeft = availableMoves（a，b，empSpace）< 1）{
 temp [index] = empSpace; 
 d--; 
 c [d] [0] = 0; 
 c [d] [1] = 0; 
 c [d] [2] = 0; 
 c [d] [3] = 0; 
 a [b [c [d] [3]] [0]] = 1; 
 a [b [c [d] [3]] [0]] = 1; 
 a [b [c [d] [3]] [0]] = 0; 
 b [c [d] [3]] [3] = 0; 
 index ++; 
} else if（movesLeft> = 1）{
 chooseMove（a，b，empSpace）; 
 index = 0; 
 for（int i = 0; i <4; i ++）{
 temp [i] = -1; 
} 
} 
 d ++; 
 solveGame（a，b）; 
 
 
 $ / code $ / pre 
 
解决方案
当前声明与定义不符。 
 
 
在使用它之前，您可能已经声明了函数 availableMoves（） ，然后你实现了一个不同的函数：
 
 pre $  int availableMoves（int * const a，int（* const）[4]， INT）; 
 
 
 // .... 
 // .... 
 // .... 
 //使用可用移动的代码
 
 
 int availableMoves（int a [15]，int b [36] [3]，int openSpace）
 {
 // .... 
} 
  

由于编译器先看到该声明，它将使用它来解析块中的调用的代码。但是，该函数不会导出，因为它具有不同的签名。

The error verbatim reads

1>yes.obj : error LNK2019: unresolved external symbol "int __cdecl availableMoves(int *     const,int (* const)[4],int)" (?availableMoves@@YAHQAHQAY03HH@Z) referenced in function "void __cdecl solveGame(int * const,int (* const)[4])" (?solveGame@@YAXQAHQAY03H@Z)

I've never seen this error before. Here are the two functions I believe it's referring to though.

int availableMoves(int a[15], int b[36][3],int openSpace){
    int count=0;
    for(int i=0; i<36;i++){
        if(i < 36 && b[i][2] == openSpace && isPeg(b[i][0],a) && isPeg(b[i][1],a) ){
            count++;
        }
    }
    return count;
}

and

void solveGame(int a[15], int b[36][4]) {
    int empSpace;
    int movesLeft;
    if(pegCount(a) < 2) {
        cout<<"game over"<<endl;
    } else {
        empSpace = findEmpty(a);
        if(movesLeft = availableMoves(a,b,empSpace) < 1 ) {
            temp[index] = empSpace;
            d--;
            c[d][0] = 0;
            c[d][1] = 0;
            c[d][2] = 0;
            c[d][3] = 0;
            a[b[c[d][3]][0]] = 1;
            a[b[c[d][3]][0]] = 1;
            a[b[c[d][3]][0]] = 0;
            b[c[d][3]][3] = 0;
            index++;
        } else if(movesLeft >= 1) {
            chooseMove( a, b, empSpace);
            index = 0;
            for(int i=0; i<4; i++) {
                temp[i] = -1;
            }
        }
        d++;
        solveGame( a, b);
    }
}

解决方案

Your current declaration doesn't match the definition.

You probably have declared the function availableMoves() before you use it, but then you implement a different function:

int availableMoves(int* const a, int (* const)[4] , int);


//....
//....
//....
//code that uses available moves


int availableMoves(int a[15], int b[36][3],int openSpace)
{
    //....
}

Since the compiler sees that declaration first, it will use it to resolve the call in the block of code. However, that function is not exported, as it has a different signature.

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