我正在上入门编程课，所以我希望这个问题不会太糟糕。到目前为止，我已经修复了 Main 函数中的所有问题，但后来我取消了 Blob 函数调用的注释，并且出现了一个我显然无法弄清楚的错误。我已经对其进行了研究，但没有找到任何适合我的问题的东西。
我相信它与我添加的**有关，以解决我的 2D 数组的先前问题（这是分配所必需的）。我在代码顶部包含了注释，以阐明程序的目标。
错误是：
错误 LNK2019：函数 _main c:\Users\Laura\documents\visual studio 2010\Projects\pr9_lt12e\ 中引用的未解析外部符号“void __cdecl Blob(char * *,int,int)”(?Blob@@YAXPAPADHH@Z) pr9_lt12e\p9_lt12e.obj
此外，输出的数组的第一行向左偏移 10 个空格。第 13 列应该有一个“X”，但它显示在 3。我已经手动更改了数组的值，以便 arr[0][12] = 'X'（在打印出数组之前）但位置确实没变。我仍然可以使用该程序而无需修复此问题，因为它只会减少几分。
我的整个代码是：
/*
SUMMARY
This program will read in data from a file and store it in a two-dimensional array.
From there it will detect all of the groupings of characters, or "blobs", in the file and count them.
INPUT
The program will read in information from a file called "blob.txt".
BAD DATA CHECKING:
N/A
OUTPUT
The program will output the amount of blobs in the file.
DATA STRUCTURES
N/A
ASSUMPTIONS
-The file will have 20 records. Each record will be 70 characters long and the character
will be either an X or a blank space/whitespace.
*/
#include <iostream>
#include <iomanip>
#include <cmath>
#include <fstream>
#include <string>
using namespace std;
//GLOBAL CONSTANTS
const int ONE_D = 22,
TWO_D = 72,
SEVEN = 7;
const char X = 'X',
B = ' ';
//FUNCTION PROTOTYPES
void Blob(char**, int, int); //Retrieves data from the file and places it into the array
//MAIN FUNCTION
int main()
{
//Declare variables
ifstream file;
string line;
// char character;
int index1 = 0,
index2 = 0,
col1 = 0,
col2 = 0,
blobCount = 0;
//Declare the 2D array. From course website.
char ** arr;
arr = new char * [ONE_D];
for (index1 = 0; index1 < ONE_D; index1++)
arr[index1] = new char [TWO_D];
//Welcome message
cout << "Welcome to the Recursive Blob Finder program!\n\n";
//Open the file
file.open("blob.txt");
//Check to see if file has been opened
if (file.is_open())
cout << "The file has been opened!\n\n";
else
cout << "The file has not been opened!\n\n";
//Read in data from the file and write to the array
for (index1 = 0; index1 < 20; index1++) {
getline(file, line);
strcpy_s(arr[index1], 72, line.c_str());
}
////Row 1 is offset by -10. Adjust first row.
//arr[0][2] = B;
//arr[0][12] = X;
//Clear non-'X' cells
for (index1 = 0; index1 < 22; index1++) {
for (index2 = 0; index2 < 72; index2++) {
if (arr[index1][index2] != X)
arr[index1][index2] = B;
}
}
//Print numbered lines
for (col1 = 1; col1 < 8; col1++)
cout << " " << col1;
cout << endl;
for (col2 = 1; col2 < 8; col2++)
cout << "1234567890";
cout << endl; //EDIT IS HERE
//Print array
for (index2 = 0; index2 < 20; index2++) {
for (index1 = 0; index1< 70; index1++)
cout << arr[index2][index1];
cout << endl;
}
//Search array for 'X' characters
for (index1 = 0; index1 < 20; index1++) {
for (index2 = 0; index2 < 70; index2++) {
//When X is found, add 1 to blob count. Blob function will clear out the remaining blob characters
if (arr[index1][index2] == X) {
blobCount++;
Blob(arr, index1, index2);
}
}
}
//Close the file
file.close();
return 0;
}
//OTHER FUNCTIONS
//Name: Blob
//Description: Recursive function to find and clear each blob.
void Blob(char **c[ONE_D][TWO_D], int row, int col)
{
//Eliminate one blob at a time
//Potential positions for 'X' after clearing the last X: Ox
// xxx
if (**c[row][col]==X) {
**c[row][col] = B;
//Test for X's connected to current blob
if (**c[row][col+1]==X)
Blob (c, row, col);
if (**c[row+1][col-1]==X)
Blob (c, row, col);
if (**c[row+1][col] == X)
Blob (c, row, col);
if (**c[row+1][col+1]==X)
Blob (c, row, col);
}
}
我尝试过的一些事情包括更改原型：
void Blob(char** c[ONE_D][TWO_D], int, int);
函数调用：
Blob(arr[][], index1, index2);
Blob(arr[][72], index1, index2);
Blob(arr[22][72], index1, index2);
和函数定义参数：
void Blob(char c[ONE_D][TWO_D], int row, int col)