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计数排序中计数容器重命名为 vecCount

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huihut
2018-11-06 22:13:00 +08:00
parent 433d20e0d9
commit 626c4952cd
1 changed files with 5 additions and 5 deletions
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10
Algorithm/CountSort.cpp
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@@ -32,19 +32,19 @@ void CountSort(vector<int>& vecRaw, vector<int>& vecObj)
// 使用 vecRaw 的最大值 + 1 作为计数容器 countVec 的大小 // 使用 vecRaw 的最大值 + 1 作为计数容器 countVec 的大小
int vecCountLength = (*max_element(begin(vecRaw), end(vecRaw))) + 1; int vecCountLength = (*max_element(begin(vecRaw), end(vecRaw))) + 1;
vector<int> countVec(vecCountLength, 0); vector<int> vecCount(vecCountLength, 0);
// 统计每个键值出现的次数 // 统计每个键值出现的次数
for (int i = 0; i < vecRaw.size(); i++) for (int i = 0; i < vecRaw.size(); i++)
countVec[vecRaw[i]]++; vecCount[vecRaw[i]]++;
// 后面的键值出现的位置为前面所有键值出现的次数之和 // 后面的键值出现的位置为前面所有键值出现的次数之和
for (int i = 1; i < vecCountLength; i++) for (int i = 1; i < vecCountLength; i++)
countVec[i] += countVec[i - 1]; vecCount[i] += vecCount[i - 1];
// 将键值放到目标位置 // 将键值放到目标位置
for (int i = vecRaw.size(); i > 0; i--) // 此处逆序是为了保持相同键值的稳定性 for (int i = vecRaw.size(); i > 0; i--) // 此处逆序是为了保持相同键值的稳定性
vecObj[--countVec[vecRaw[i - 1]]] = vecRaw[i - 1]; vecObj[--vecCount[vecRaw[i - 1]]] = vecRaw[i - 1];
} }
int main() int main()
@@ -57,6 +57,6 @@ int main()
for (int i = 0; i < vecObj.size(); ++i) for (int i = 0; i < vecObj.size(); ++i)
cout << vecObj[i] << " "; cout << vecObj[i] << " ";
cout << endl; cout << endl;
return 0; return 0;
} }