int i=0; while(i<10){ i++; if(i<1) continue; if(i==5) break; }
时间: 2023-07-14 09:58:02 浏览: 101
这段代码会使变量 `i` 的值变为 5,因为当 `i` 的值等于 5 时,会执行 `break` 语句,跳出循环。
代码中使用了 `while` 循环来对变量 `i` 进行迭代,每次迭代会将 `i` 的值加 1。在循环体中,首先使用 `continue` 语句跳过 `i` 小于 1 的情况,然后判断 `i` 是否等于 5,如果等于 5,则执行 `break` 语句跳出循环。
因为变量 `i` 的初始值为 0,所以在第一次循环迭代中,`i` 的值会变成 1。然后进入循环体中,因为 `i` 大于等于 1,所以不会执行 `continue` 语句,然后判断 `i` 是否等于 5,因为 `i` 不等于 5,所以继续进行下一次循环迭代。在第二次循环迭代中,`i` 的值变成 2,依次类推,直到第五次循环迭代中,`i` 的值变成 5,执行 `break` 语句跳出循环。
因此,最后输出的 `i` 的值为 5。
相关问题
#include <iostream> #include <cstring> #include <algorithm> #include <vector> using namespace std; const int N = 10; int n, m; int a[N]; int main() { cout << "请输入结点数:" << endl; while (cin >> n >> m) //输入图1、2的结点数 { if (m != n) { cout << "两图不同构!!!" << endl; continue; } //根据结点数n、m,动态生成两个二维数组来存图(使用邻接矩阵的方式) vector<int> w1(n + 1, 0); vector<vector<int> > g1(n + 1, w1); vector<int> w2(m + 1, 0); vector<vector<int> > g2(m + 1, w2); for (int i = 1; i <= n; i++) a[i] = i; //初始化a数组 for (int i = 1; i <= n; i++) //输入图1的邻接矩阵 for (int j = 1; j <= n; j++) cin >> g1[i][j]; for (int i = 1; i <= m; i++) //输入图2的邻接矩阵 for (int j = 1; j <= m; j++) cin >> g2[i][j]; //全排列 do { bool f = 0; int temp[N][N]; memset(temp, 0, sizeof temp); for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { temp[i][j] = g1[a[i]][a[j]]; } } for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { if (temp[i][j] != g2[i][j]) { f = 1; break; } } if (f == 1) break; } if (f == 0) cout << "两图同构^-^" << endl; } while (next_permutation(a + 1, a + 1 + n)); cout << "两图不同构!!!" << endl; } return 0; }简化的完整代码
这是一个判断两个图是否同构的程序,输入两个图的邻接矩阵,通过枚举两个图的节点的排列顺序,判断它们是否同构。如果是同构的,则输出"两图同构^-^",否则输出"两图不同构!!!"。
```cpp
#include <iostream>
#include <cstring>
#include <algorithm>
#include <vector>
using namespace std;
const int N = 10;
int n, m;
int a[N];
int main() {
cout << "请输入结点数:" << endl;
while (cin >> n >> m) { //输入图1、2的结点数
if (m != n) {
cout << "两图不同构!!!" << endl;
continue;
}
//根据结点数n、m,动态生成两个二维数组来存图(使用邻接矩阵的方式)
vector<int> w1(n + 1, 0);
vector<vector<int> > g1(n + 1, w1);
vector<int> w2(m + 1, 0);
vector<vector<int> > g2(m + 1, w2);
for (int i = 1; i <= n; i++) a[i] = i; //初始化a数组
for (int i = 1; i <= n; i++) //输入图1的邻接矩阵
for (int j = 1; j <= n; j++)
cin >> g1[i][j];
for (int i = 1; i <= m; i++) //输入图2的邻接矩阵
for (int j = 1; j <= m; j++)
cin >> g2[i][j];
//全排列
do {
bool f = 0;
int temp[N][N];
memset(temp, 0, sizeof temp);
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
temp[i][j] = g1[a[i]][a[j]];
}
}
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= n; j++) {
if (temp[i][j] != g2[i][j]) {
f = 1;
break;
}
}
if (f == 1) break;
}
if (f == 0) cout << "两图同构^-^" << endl;
} while (next_permutation(a + 1, a + 1 + n));
cout << "两图不同构!!!" << endl;
}
return 0;
}
```
改写成python语言import java.util.LinkedList; import java.util.List; import java.util.Scanner; public class Main { private static final int N = 1000 + 10; private static int[] get_cost(){ int[] cost = new int[N]; boolean[] vis = new boolean[N]; for(int i=1;i<N;i++){ cost[i] = -1; vis[i] = false; } LinkedList<Integer> que = new LinkedList<>(); que.addLast(1); cost[1] = 0; vis[1] = true; while(!que.isEmpty()){ int cur = que.pollFirst(); for(int i=1;i<=cur;i++){ int nxt = cur + cur / i; if(nxt >= N){ continue; } if(vis[nxt]){ continue; } vis[nxt] = true; cost[nxt] = cost[cur] + 1; que.addLast(nxt); } } return cost; } public static void main(String[] args) { int[] cost = get_cost(); int[] b = new int[N]; int[] c = new int[N]; int[] w = new int[N]; int[] dp = new int[12 * N]; Scanner scanner = new Scanner(System.in); int T = scanner.nextInt(); while (T > 0) { int n = scanner.nextInt(); int k = scanner.nextInt(); for (int i = 1; i <= n; i++) { b[i] = scanner.nextInt(); } for (int i = 1; i <= n; i++) { c[i] = scanner.nextInt(); } for (int i = 1; i <= n; i++) { w[i] = cost[b[i]]; } int sum_w = 0; for (int i = 1; i <= n; i++) { sum_w += w[i]; } int sum_c = 0; for (int i = 1; i <= n; i++) { sum_c += c[i]; } if (k >= sum_w) { System.out.println(sum_c); } else { for (int i = 0; i <= k; i++) { dp[i] = 0; } for (int i = 1; i <= n; i++) { for (int j = k; j >= w[i]; j--) { int v = dp[j - w[i]] + c[i]; if (dp[j] < v) { dp[j] = v; } } } System.out.println(dp[k]); } T--; } } }
这是Java代码,可以使用Jython将其转换成Python代码,也可以手动将其改写成Python代码。以下是手动改写的Python代码:
```python
from collections import deque
N = 1010
def get_cost():
cost = [-1] * N
vis = [False] * N
que = deque([1])
cost[1] = 0
vis[1] = True
while que:
cur = que.popleft()
for i in range(1, cur+1):
nxt = cur + cur // i
if nxt >= N or vis[nxt]:
continue
vis[nxt] = True
cost[nxt] = cost[cur] + 1
que.append(nxt)
return cost
def main():
cost = get_cost()
dp = [0] * (12 * N)
T = int(input())
for _ in range(T):
n, k = map(int, input().split())
b = list(map(int, input().split()))
c = list(map(int, input().split()))
w = [cost[b[i]] for i in range(n)]
sum_w = sum(w)
sum_c = sum(c)
if k >= sum_w:
print(sum_c)
else:
for i in range(k+1):
dp[i] = 0
for i in range(n):
for j in range(k, w[i]-1, -1):
v = dp[j - w[i]] + c[i]
if dp[j] < v:
dp[j] = v
print(dp[k])
if __name__ == '__main__':
main()
```
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