我这里有代码,我在 n1、n2 处得到错误:表达式必须具有常量值,变量“n2”的值不能用作常量。我试过#define、delete[]、const,甚至std::vector,但都没有奏效。还有其他方法可以修复此错误吗?
void merge(list1 arr[], int l, int m, int r)
{
int n1 = m - l + 1;
int n2 = r - m;
// Create temp arrays
list1 L[n1], R[n2];
// Copy data to temp arrays L[] and R[]
for (int i = 0; i < n1; i++)
L[i] = arr[l + i];
for (int j = 0; j < n2; j++)
R[j] = arr[m + 1 + j];
// Merge the temp arrays back into arr[l..r]
// Initial index of first subarray
int i = 0;
// Initial index of second subarray
int j = 0;
// Initial index of merged subarray
int k = l;
while (i < n1 && j < n2) {
if (L[i].team_1 <= R[j].team_1) { //Have to sort data based on team1
arr[k] = L[i];
i++;
}
else {
arr[k] = R[j];
j++;
}
k++;
}
// Copy the remaining elements of
// L[], if there are any
while (i < n1) {
arr[k] = L[i];
i++;
k++;
}
// Copy the remaining elements of
// R[], if there are any
while (j < n2) {
arr[k] = R[j];
j++;
k++;
}
}
// l is for left index and r is
// right index of the sub-array
// of arr to be sorted */
void mergeSort(list1 arr[], int l, int r) {
if (l >= r) {
return;//returns recursively
}
int m = l + (r - l) / 2;
mergeSort(arr, l, m);
mergeSort(arr, m + 1, r);
merge(arr, l, m, r);
}