为什么我会收到断言错误？
#include <iostream>
using namespace std;
int main ()
{
int size = 0;
int* myArray = new int [size + 1];
cout << "Enter the exponent of the first term: ";
cin >> size;
cout << endl;
for (int i = size; i >= 0; --i)
{
cout << "Enter the coefficient of the term with exponent "
<< i << ": ";
cin >> myArray[i];
}
for (int i = size; i >= 0; --i)
{
cout << i << endl;
}
return 0;
}
为什么输入大于 2 时会出现断言错误？这是多项式程序的前身，其中数组的下标是每一项的幂，而 array[下标] 处的元素是系数。
#include <iostream>
using namespace std;
int main ()
{
int size = 0;
int* myArray = new int [size + 1];
cout << "Enter the exponent of the first term: ";
cin >> size;
cout << endl;
for (int i = size; i >= 0; --i)
{
cout << "Enter the coefficient of the term with exponent "
<< i << ": ";
cin >> myArray[i];
}
for (int i = size; i >= 0; --i)
{
cout << i << endl;
}
return 0;
}
Why am I getting an assertion error on input greater than 2? This is the precursor to a polynomial program where the subscript of the array is the power of each term and the element at array[subscript] is the coefficient.
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您的数组被分配为 int[1]。它需要在您读取大小值之后分配。
Your array is allocated to be an int[1]. It needs to be allocated after you read in the size value.
当 size = 0 时，您正在初始化数组，数组大小为 1
当超出数组边界 (1) 时，您会收到断言错误。
You are initializing your array when size = 0, giving an array size of 1
You get your assertion error when you go outside of the array bounds (1).
myArray 的大小始终为 0 + 1 = 1。 i 从用户输入的任何内容开始，您进行的第一个数组访问是 myArray[i]。因此，假设用户输入 5，您的数组大小为 1，并且您访问 myArray[5]。它会失败！
我会在输入大小后分配数组。
myArray always has size 0 + 1 = 1. i starts out at whatever the user inputted, and the first array access you make is myArray[i]. So, say the user inputs 5, your array has size 1 and you access myArray[5]. It will fail!
I would allocate the array AFTER you input size.