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类
我试着写一个程序,但我得到的分割故障(核心转储)运行时。当我把一个定义的数组像array_2d [10] [1],问题就解决了,但我需要为我的项目做内存分配。这是我的代码的简单版本:指针多维数组中
#include <iostream>
#include <cmath>
#include <fstream>
#include <cstdlib>
#include <string>
using namespace std;
class Exam
{
private:
double** array_2d;
unsigned int num;
unsigned int num1;
public:
Exam();
void memoryallocation();
void show();
};
Exam::Exam()
{
num=10;
num1=1;
}
void Exam::memoryallocation()
{
double** array_2d = new double*[num];
for (unsigned int i = 0; i < num ;i++)
{
array_2d[i] = new double[num1];
}
}
void Exam::show()
{
ifstream file;
file.open("fish.txt");
for (unsigned int i = 0; i < num; i++)
{
for (unsigned int j = 0; j < num1; j++)
{
file >> array_2d[i][j];
cout<<array_2d[i][j]<<" ";
}
cout<<endl;
}
file.close();
}
int main()
{
Exam E;
E.memoryallocation();
E.show();
return 0;
}
请举报您正在使用的语言。 – crafter