#include
#include
using namespace std;
int findmid(int a, int b, int c, int d);
int intxt[401];
ofstream outfile;
int main() {
ifstream infile;
outfile.open(“D:\123\output.txt”);
infile.open(“D:\123\input.txt”);
if (!infile.is_open()||!outfile.is_open()) {
cout << “文件打开失败”;
return 0;
}
for (int i = 0; !infile.eof(); i++) {//读取数组
infile >> intxt[i];
}
int n = intxt[0];
findmid(1, n, n + 1, 2 * n);
infile.close();
outfile.close();
return 0;
}
//递归求中位数算法
int findmid(int a, int b, int c, int d) {
if (a == b) { //划分至每个数组只有一个数时
if (intxt[b] < intxt[c]) {
outfile << intxt[b];
cout << intxt[b];
}
else {
outfile << intxt[c];
cout << intxt[c];
}
return 0;
}
//比较两个数组中位数
int x = (a + b) / 2;
int y = (c + d) / 2;
int x1 = intxt[x];
int y1 = intxt[y];
if (x1 > y1) {
findmid(a, x, c + b - x, d);
}
else if (x1 < y1) {
findmid(a + d - y, b, c, y);
}
else {
outfile << x1;
cout << x1;
}
return 0;
}
中序数问题 分治法
最新推荐文章于 2019-09-17 20:07:36 发布
