为什么测试是对的，提交全WA

TD21260225 @ 2022-09-21 20:57:38

#include <bits/stdc++.h>
#include <math.h>
using namespace std;
int main(){
    int num,temp=0;
    int arr[100];
    int N ,W;
    cin>>N>>W;
    int array[N][N];
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            if(num== W){
                num=0;
                cin>>W;
                if(temp==1){
                    temp=0;
                }else{
                    temp =1;
                }
            }
            array[i][j]=temp;
            num++;
        }
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout <<array[i][j];
        }
        cout << endl;
    }
}

by TD21260225 @ 2022-09-21 20:58:12

输出是

7 3 1 6 1 6 4 3 1 6 1 6 1 3 7
0001000
0001000
0001111
0001000
0001000
0001000
1111111

by fortyyearslater @ 2022-09-21 21:13:44

@TD21260225 num没赋初值0

by Mr_RedStone @ 2022-09-21 21:14:21

你把那个array[N][N]改成[210][210],就能过了，因为数组定义时传长度得是const类型

by LeTu_Jun @ 2022-09-21 21:27:17

@TD21260225 不要在定义数组时用变量定义大小，这是一个 UB

by liwenxi114514 @ 2022-09-21 21:33:41

#include <bits/stdc++.h>
#include <math.h>
using namespace std;
int main(){
    int num=0,temp=0;
    int arr[100];
    int N ,W;
    cin>>N>>W;
    int array[210][210];
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            if(num== W){
                num=0;
                cin>>W;
                if(temp==1){
                    temp=0;
                }else{
                    temp =1;
                }
            }
            array[i][j]=temp;
            num++;
        }
    }
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout <<array[i][j];
        }
        cout << endl;
    }
}

by TD21260225 @ 2022-09-22 14:31:35

@liwenxi110720 谢谢啊

by TD21260225 @ 2022-09-22 14:31:55

@LeTu_Jun 谢谢

by TD21260225 @ 2022-09-22 14:32:14

@Mr_RedStone 谢谢

by TD21260225 @ 2022-09-22 14:32:45

@fortyyearslater 谢谢