c语言实现基数排序解析及代码示例

#include<cstdio> 
#include<cstring> 
#include<algorithm> 
using namespace std; 
 
int getDigitNum(int x){ 
  if(x == 0) return 1; 
  int res = 0; 
  while(x){ 
    res ++; 
    x /= 10; 
  } 
  return res; 
} 
void RadixSort(int data[], int n){ 
  //find the Maximum and its digit number 
  int Max = data[0]; 
  for(int i = 1; i < n; i++){ 
    if(Max < data[i]) Max = data[i]; 
  } 
  int maxNum = getDigitNum(Max); 
  //maxNum times radix sort 
  int divisor = 1; 
  for(int k = 0; k < maxNum; k++){ 
    vector<int> g[10];//g[i]中包含了"末位"数字是i的data[]数组中的元素 
    for(int i = 0; i < 10; i++) g[i].clear(); 
    for(int i = 0; i < n; i++){ 
      int tmp = data[i] / divisor % 10; 
      g[tmp].push_back(data[i]); 
    } 
    int cnt = 0; 
    for(int i = 0; i < 10; i++){ 
      for(int j = 0; j < g[i].size(); j++){ 
        data[cnt++] = g[i][j]; 
      } 
    } 
    divisor *= 10; 
  } 
} 
int main(){ 
  int Array[10] = {73,22,93,43,55,14,28,65,39,81}; 
  RadixSort(Array, 10); 
  for(int i = 0; i < 10; i++){ 
    printf("%d ", Array[i]); 
  } 
  printf("\n"); 
  return 0; 
}