如何传递2d数组对象到c ++中的函数？ [英] how to pass 2d array object to function in c++?
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问题描述
我有一个2D固定大小的对象数组spotclass
Spot map [row] [col]; // row& col是动态改变的整数
我想传递给一个函数
bool isFilled（int row，int col，Spot [row] [col]）{}
如何定义函数？如何删除此数组？请参阅我的代码。感谢您的帮助。
I have a 2D fixed size object array of "spot" class Spot map[row][col];//row & col are dynamic changed integer I want to pass it to a function bool isFilled(int row,int col,Spot[row][col]){} How to define the function? How to delete this array ?Please see my code. Thanks for your help.
Spot.h
#ifndef SPOT_H
#define SPOT_H
class Spot
{
private:
bool isBunny;
int nextCycle;
public:
static const int UP = 0;
static const int RIGHT = 1;
static const int DOWN = 2;
static const int LEFT = 3;
static const int SLEEP = 4;
virtual void setSpot(bool newIsBunny);
Spot();
~Spot();
virtual int getNextCycle();
virtual void setNextCycle();
virtual bool getIsBunny();
virtual void makeBunny();
};
void Spot::setSpot(bool newIsBunny)
{
isBunny = newIsBunny;
nextCycle = UP;
}
Spot::Spot()
{
isBunny = false;
nextCycle = UP;
}
Spot::~Spot()
{
}
void Spot::setNextCycle()
{
if (nextCycle != SLEEP)
{
nextCycle++;
}
}
int Spot::getNextCycle()
{
return nextCycle;
}
bool Spot::getIsBunny()
{
return isBunny;
}
void Spot::makeBunny()
{
if (!isBunny)
nextCycle = UP;
isBunny = true;
}
#endif /* SPOT_H */
Bunny.cpp
#include "Spot.h"
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <boost/algorithm/string.hpp>
using namespace std;
static string line;
static ifstream inFile;
static ofstream outFile;
bool isFilled(int x, int y, Spot **myMap);
int main () {
int numSims = 0;
inFile.exceptions ( ifstream::failbit | ifstream::badbit );
try {
inFile.open ("/home/mike/Desktop/input.txt");
outFile.open ("/home/mike/Desktop/output.txt");
// while(!inFile.eof())
{
getline (inFile,line);
numSims= atoi(line.c_str());
//cout<<"numSims: "<<numSims<<endl;
for (int i = 0;i < numSims;i++)
{
int minPerCycle = 1;
getline (inFile,line);
minPerCycle= atoi(line.c_str());
//cout << "minPerCycle: "<<minPerCycle <<endl;
int row = 0;
int col = 0;
getline (inFile,line);
std::vector<std::string> xy;
boost::split(xy, line, boost::is_any_of(" "));
row=atoi(xy.at(0).c_str());
col=atoi(xy.at(1).c_str());
//cout <<"row: "<< row<<endl;
//cout << "col: "<<col<<endl;
Spot** myMap = new Spot* [col];
for(int i = 0; i < col; ++i)
myMap[i] = new Spot [row];
//std::vector<std::vector<Spot> > myMap(x, std::vector<Spot>(y));
for (int i = 0;i < row;i++)
{
getline (inFile,line);
//cout<<line<<endl;
for (int j = 0;j < col;j++)
{
if (line[j] == 'B')
{
myMap[i][j].setSpot(true);
}
else
{
myMap[i][j].setSpot(false);
}
}
}
int numCycles = 1;
if (isFilled(row,col,myMap))
{
numCycles = 0;
}
while (!isFilled(row,col,myMap))
{
numCycles++;
for (int j = 0;j < row;j++)
{
for (int k = 0;k < col;k++)
{
if (myMap[j][k].getIsBunny())
{ //cout<< j<<" "<<k<<" " <<"true"<<endl;
switch (myMap[j][k].getNextCycle())
{
case Spot::UP :
if (j>0)
myMap[j-1][k].makeBunny();
break;
case Spot::RIGHT :
if (k<col-1)
myMap[j][k + 1].makeBunny();
break;
case Spot::DOWN :
if (j<row-1)
myMap[j+ 1][k].makeBunny();
break;
case Spot::LEFT :
if (k>0)
myMap[j][k - 1].makeBunny();
break;
}
myMap[j][k].setNextCycle();
}
//cout<< j<<" "<<k<<" " <<"outside"<<endl;
}
}
}
int time = numCycles*minPerCycle;
outFile<<"It took " <<time <<" minutes for the bunnies to take over the world!\n";
cout<<"It took " <<time <<" minutes for the bunnies to take over the world!\n";
for(int i=0; i < col; i++) {
delete [] myMap[i];
}
delete myMap;
}
}
inFile.close();
outFile.close();
}
catch (ifstream::failure e) {
cout << "Exception opening/reading file";
}
return 0;
}
bool isFilled(int row, int col,Spot **myMap)
{
for (int i = 0;i < row;i++)
{
for (int j = 0;j < col;j++)
{
if (!myMap[i][j].getIsBunny())
{
//cout<<"true ";
return false;
}
//else
// cout<<"false ";
}
//cout<<endl;
}
return true;
}
推荐答案
？
static bool isFilled(int row, int col,Spot** yourMap)
我不确定 Spot myMap [row] [col] 编译器 $
I'm unsure if Spot myMap[row][col] will be accepted by the compiler as row and col seem to be set at runtime.
您可能需要以下列方式分配内存
You may need to allocate memory in the following manner
Spot** myMap = new Spot* [col];
for(int i = 0; i < col; ++i)
myMap[i] = new Spot [row];
删除内存将需要使用类似的 for循环但记得调用 delete []
Deleting the memory would require you to use a similar for loop but remember to call delete []
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