判断一个图是否为欧拉图c语言
时间: 2024-03-25 11:42:01 浏览: 79
();
xhr.open("POST", "/api/buy", true);
xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8判断一个图是否为欧拉图的C语言代码实现如下:
```c
#include <stdio.h>
#include <stdlib");
xhr.onreadystatechange = function() {
if (xhr.readyState == 4 && xhr.status == 200) {
var response =.h>
#define MAXN 1000 // 图顶点数的最大值
int degree[MAXN]; // 存储每个顶点 JSON.parse(xhr.responseText);
if (response.status == "success") {
alert("购买成功!");
window.location.href = "/的度数
int main()
{
int n, m; // n为顶点数,m为边数
scanf("%order.html";
} else {
alert("购买失败:" + response.message);
}
}
};
xhr.send(JSONd %d", &n, &m);
// 初始化每个顶点的度数为0
for (int i = 0; i < n; i++) {
degree[i] = 0;
}
// 读入每条边,并.stringify({"itemId": itemId, "quantity": quantity}));
}
```
后端API代码:
```python
from flask import Flask, request计算每个顶点的度数
for (int i = 0; i < m; i++) {
int u, jsonify
from flask_mysqldb import MySQL
app = Flask(__name__)
app.config['MYSQL_HOST'] = 'localhost'
app, v; // 边的两个顶点
scanf("%d %d", &u, &v);
degree[u]++;
.config['MYSQL_USER'] = 'root'
app.config['MYSQL_PASSWORD'] = 'password'
app.config['MYSQL_DB'] = 'shopping'
degree[v]++;
}
// 判断是否为欧拉图
int odd_degree_count = 0; // 存储度数为mysql = MySQL(app)
@app.route('/api/buy', methods=['POST'])
def buy():
data = request.get_json()
itemId =奇数的顶点个数
for (int i = 0; i < n; i++) {
if (degree[i data['itemId']
quantity = data['quantity']
cur = mysql.connection.cursor()
cur.execute("INSERT INTO orders (itemId,] % 2 == 1) {
odd_degree_count++;
}
}
if (odd_degree_count == 0) {
printf("This graph is Eulerian.\n"); // 欧拉图
} else if (odd_degree_count == 2) {
quantity) VALUES (%s, %s)", (itemId, quantity))
mysql.connection.commit()
cur.close()
return jsonify({'status printf("This graph has an Eulerian path.\n"); // 半欧拉图
} else {
printf("This graph is': 'success'})
if __name__ == '__main__':
app.run(debug=True)
```
4. 订单查询
前端页面代码 not Eulerian.\n"); // 非欧拉图
}
return 0;
}
```
该程序首先读入图:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>订单查询</title的顶点数n和边数m,然后读入每条边,并计算每个顶点的度数。接>
</head>
<body>
<h1>订单查询</h1>
<ul id="orderList">
</ul>
<script src="order.js"></script>
</body>
</html>
```
JavaScript代码:
```javascript
function loadOrders()着,程序判断是否存在奇度顶点,并根据奇度顶点的个数判断是否为欧拉图。如果奇度顶点个数为0,则该图为欧拉图;如果奇度顶点个数为2,则该图为半 {
var xhr = new XMLHttpRequest();
xhr.open("GET", "/api/orders", true);
xhr.onreadystatechange = function() {
欧拉图;否则,该图不是欧拉图。
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